Enum Class Opcode

java.lang.Object

java.lang.Enum<Opcode>

java.lang.classfile.Opcode

All Implemented Interfaces:: Serializable, Comparable<Opcode>, Constable

public enum Opcode extends Enum<Opcode>

Describes the opcodes of the JVM instruction set, as described in JVMS 6.5. This includes a few pseudo-opcodes modified by wide.

An opcode describes the operation of an instruction.

API Note:

The enum constants are named after the opcodes' mnemonics in uppercase. Wide pseudo-opcodes are named with the original opcodes' mnemonic plus a _W suffix. However, ldc_w, ldc2_w, goto_w, and jsr_w are legitimate opcodes instead of wide pseudo-opcodes.

See Java Virtual Machine Specification:

6.5 Instructions

Since:

See Also:

Nested Class Summary

Modifier and Type	Class	Description
`static enum`	`Opcode.Kind`	Kinds of opcodes.

Nested classes/interfaces declared in class Enum

Enum.EnumDesc<E>

Enum Constant Summary

Enum Constant	Description
`AALOAD`	Load `reference` from array.
`AASTORE`	Store into `reference` array.
`ACONST_NULL`	Push `null`.
`ALOAD`	Load `reference` from local variable.
`ALOAD_0`	Load `reference` from local variable slot `0`.
`ALOAD_1`	Load `reference` from local variable slot `1`.
`ALOAD_2`	Load `reference` from local variable slot `2`.
`ALOAD_3`	Load `reference` from local variable slot `3`.
`ALOAD_W`	Load `reference` from local variable (wide index).
`ANEWARRAY`	Create new array of `reference`.
`ARETURN`	Return `reference` from method.
`ARRAYLENGTH`	Get length of array.
`ASTORE`	Store `reference` into local variable.
`ASTORE_0`	Store `reference` into local variable slot `0`.
`ASTORE_1`	Store `reference` into local variable slot `1`.
`ASTORE_2`	Store `reference` into local variable slot `2`.
`ASTORE_3`	Store `reference` into local variable slot `3`.
`ASTORE_W`	Store `reference` into local variable (wide index).
`ATHROW`	Throw exception or error.
`BALOAD`	Load `byte` or `boolean` from array.
`BASTORE`	Store into `byte` or `boolean` array.
`BIPUSH`	Push `int` value from sign-extension of immediate `byte` value.
`CALOAD`	Load `char` from array.
`CASTORE`	Store into `char` array.
`CHECKCAST`	Check whether object is of given type.
`D2F`	Convert `double` to `float`.
`D2I`	Convert `double` to `int`.
`D2L`	Convert `double` to `long`.
`DADD`	Add `double`.
`DALOAD`	Load `double` from array.
`DASTORE`	Store into `double` array.
`DCMPG`	Compare `double`.
`DCMPL`	Compare `double`.
`DCONST_0`	Push `double` constant `0.0D`.
`DCONST_1`	Push `double` constant `1.0D`.
`DDIV`	Divide `double`.
`DLOAD`	Load `double` from local variable.
`DLOAD_0`	Load `double` from local variable slot `0`.
`DLOAD_1`	Load `double` from local variable slot `1`.
`DLOAD_2`	Load `double` from local variable slot `2`.
`DLOAD_3`	Load `double` from local variable slot `3`.
`DLOAD_W`	Load `double` from local variable (wide index).
`DMUL`	Multiply `double`.
`DNEG`	Negate `double`.
`DREM`	Remainder `double`.
`DRETURN`	Return `double` from method.
`DSTORE`	Store `double` into local variable.
`DSTORE_0`	Store `double` into local variable slot `0`.
`DSTORE_1`	Store `double` into local variable slot `1`.
`DSTORE_2`	Store `double` into local variable slot `2`.
`DSTORE_3`	Store `double` into local variable slot `3`.
`DSTORE_W`	Store `double` into local variable (wide index).
`DSUB`	Subtract `double`.
`DUP`	Duplicate the top operand stack value.
`DUP_X1`	Duplicate the top operand stack value and insert two values down.
`DUP_X2`	Duplicate the top operand stack value and insert two or three values down.
`DUP2`	Duplicate the top one or two operand stack values.
`DUP2_X1`	Duplicate the top one or two operand stack values and insert two or three values down.
`DUP2_X2`	Duplicate the top one or two operand stack values and insert two, three, or four values down.
`F2D`	Convert `float` to `double`.
`F2I`	Convert `float` to `int`.
`F2L`	Convert `float` to `long`.
`FADD`	Add `float`.
`FALOAD`	Load `float` from array.
`FASTORE`	Store into `float` array.
`FCMPG`	Compare `float`.
`FCMPL`	Compare `float`.
`FCONST_0`	Push `float` constant `0.0F`.
`FCONST_1`	Push `float` constant `1.0F`.
`FCONST_2`	Push `float` constant `2.0F`.
`FDIV`	Divide `float`.
`FLOAD`	Load `float` from local variable.
`FLOAD_0`	Load `float` from local variable slot `0`.
`FLOAD_1`	Load `float` from local variable slot `1`.
`FLOAD_2`	Load `float` from local variable slot `2`.
`FLOAD_3`	Load `float` from local variable slot `3`.
`FLOAD_W`	Load `float` from local variable (wide index).
`FMUL`	Multiply `float`.
`FNEG`	Negate `float`.
`FREM`	Remainder `float`.
`FRETURN`	Return `float` from method.
`FSTORE`	Store `float` into local variable.
`FSTORE_0`	Store `float` into local variable slot `0`.
`FSTORE_1`	Store `float` into local variable slot `1`.
`FSTORE_2`	Store `float` into local variable slot `2`.
`FSTORE_3`	Store `float` into local variable slot `3`.
`FSTORE_W`	Store `float` into local variable (wide index).
`FSUB`	Subtract `float`.
`GETFIELD`	Fetch field from object.
`GETSTATIC`	Get `static` field from class.
`GOTO`	Branch always.
`GOTO_W`	Branch always (wide index).
`I2B`	Convert `int` to `byte`.
`I2C`	Convert `int` to `char`.
`I2D`	Convert `int` to `double`.
`I2F`	Convert `int` to `float`.
`I2L`	Convert `int` to `long`.
`I2S`	Convert `int` to `short`.
`IADD`	Add `int`.
`IALOAD`	Load `int` from array.
`IAND`	Bitwise AND `int`.
`IASTORE`	Store into `int` array.
`ICONST_0`	Push `int` constant `0`.
`ICONST_1`	Push `int` constant `1`.
`ICONST_2`	Push `int` constant `2`.
`ICONST_3`	Push `int` constant `3`.
`ICONST_4`	Push `int` constant `4`.
`ICONST_5`	Push `int` constant `5`.
`ICONST_M1`	Push `int` constant `-1`.
`IDIV`	Divide `int`.
`IF_ACMPEQ`	Branch if `reference` comparison `operand1 == operand2` succeeds.
`IF_ACMPNE`	Branch if `reference` comparison `operand1 != operand2` succeeds.
`IF_ICMPEQ`	Branch if `int` comparison `operand1 == operand2` succeeds.
`IF_ICMPGE`	Branch if `int` comparison `operand1 >= operand2` succeeds.
`IF_ICMPGT`	Branch if `int` comparison `operand1 > operand2` succeeds.
`IF_ICMPLE`	Branch if `int` comparison `operand1 <= operand2` succeeds.
`IF_ICMPLT`	Branch if `int` comparison `operand1 < operand2` succeeds.
`IF_ICMPNE`	Branch if `int` comparison `operand1 != operand2` succeeds.
`IFEQ`	Branch if `int` comparison `== 0` succeeds.
`IFGE`	Branch if `int` comparison `>= 0` succeeds.
`IFGT`	Branch if `int` comparison `> 0` succeeds.
`IFLE`	Branch if `int` comparison `<= 0` succeeds.
`IFLT`	Branch if `int` comparison `< 0` succeeds.
`IFNE`	Branch if `int` comparison `!= 0` succeeds.
`IFNONNULL`	Branch if `reference` is not `null`.
`IFNULL`	Branch if `reference` is `null`.
`IINC`	Increment `int` local variable by constant.
`IINC_W`	Increment local variable by constant (wide index).
`ILOAD`	Load `int` from local variable.
`ILOAD_0`	Load `int` from local variable slot `0`.
`ILOAD_1`	Load `int` from local variable slot `1`.
`ILOAD_2`	Load `int` from local variable slot `2`.
`ILOAD_3`	Load `int` from local variable slot `3`.
`ILOAD_W`	Load `int` from local variable (wide index).
`IMUL`	Multiply `int`.
`INEG`	Negate `int`.
`INSTANCEOF`	Determine if object is of given type.
`INVOKEDYNAMIC`	Invoke a dynamically-computed call site.
`INVOKEINTERFACE`	Invoke interface method.
`INVOKESPECIAL`	Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes.
`INVOKESTATIC`	Invoke a class (`static`) method.
`INVOKEVIRTUAL`	Invoke instance method; dispatch based on class.
`IOR`	Bitwise OR `int`.
`IREM`	Remainder `int`.
`IRETURN`	Return `int` from method.
`ISHL`	Shift left `int`.
`ISHR`	Arithmetic shift right `int`.
`ISTORE`	Store `int` into local variable.
`ISTORE_0`	Store `int` into local variable slot `0`.
`ISTORE_1`	Store `int` into local variable slot `1`.
`ISTORE_2`	Store `int` into local variable slot `2`.
`ISTORE_3`	Store `int` into local variable slot `3`.
`ISTORE_W`	Store `int` into local variable (wide index).
`ISUB`	Subtract `int`.
`IUSHR`	Logical shift right `int`.
`IXOR`	Bitwise XOR `int`.
`JSR`	(Discontinued) Jump subroutine; last used in major version 50.
`JSR_W`	(Discontinued) Jump subroutine (wide index); last used in major version 50.
`L2D`	Convert `long` to `double`.
`L2F`	Convert `long` to `float`.
`L2I`	Convert `long` to `int`.
`LADD`	Add `long`.
`LALOAD`	Load `long` from array.
`LAND`	Bitwise AND `long`.
`LASTORE`	Store into `long` array.
`LCMP`	Compare `long`.
`LCONST_0`	Push `long` constant `0L`.
`LCONST_1`	Push `long` constant `1L`.
`LDC`	Push item from run-time constant pool.
`LDC_W`	Push item from run-time constant pool (wide index).
`LDC2_W`	Push `long` or `double` from run-time constant pool (wide index).
`LDIV`	Divide `long`.
`LLOAD`	Load `long` from local variable.
`LLOAD_0`	Load `long` from local variable slot `0`.
`LLOAD_1`	Load `long` from local variable slot `1`.
`LLOAD_2`	Load `long` from local variable slot `2`.
`LLOAD_3`	Load `long` from local variable slot `3`.
`LLOAD_W`	Load `long` from local variable (wide index).
`LMUL`	Multiply `long`.
`LNEG`	Negate `long`.
`LOOKUPSWITCH`	Access jump table by key match and jump.
`LOR`	Bitwise OR `long`.
`LREM`	Remainder `long`.
`LRETURN`	Return `long` from method.
`LSHL`	Shift left `long`.
`LSHR`	Arithmetic shift right `long`.
`LSTORE`	Store `long` into local variable.
`LSTORE_0`	Store `long` into local variable slot `0`.
`LSTORE_1`	Store `long` into local variable slot `1`.
`LSTORE_2`	Store `long` into local variable slot `2`.
`LSTORE_3`	Store `long` into local variable slot `3`.
`LSTORE_W`	Store `long` into local variable (wide index).
`LSUB`	Subtract `long`.
`LUSHR`	Logical shift right `long`.
`LXOR`	Bitwise XOR `long`.
`MONITORENTER`	Enter monitor for object.
`MONITOREXIT`	Exit monitor for object.
`MULTIANEWARRAY`	Create new multidimensional array.
`NEW`	Create new object.
`NEWARRAY`	Create new array.
`NOP`	Do nothing.
`POP`	Pop the top operand stack value.
`POP2`	Pop the top one or two operand stack values.
`PUTFIELD`	Set field in object.
`PUTSTATIC`	Set `static` field in class.
`RET`	(Discontinued) Return from subroutine; last used in major version 50.
`RET_W`	(Discontinued) Return from subroutine (wide index); last used in major version 50.
`RETURN`	Return `void` from method.
`SALOAD`	Load `short` from array.
`SASTORE`	Store into `short` array.
`SIPUSH`	Push `int` value from sign-extension of immediate `short` value.
`SWAP`	Swap the top two operand stack values.
`TABLESWITCH`	Access jump table by index and jump.

Method Summary

Modifier and Type	Method	Description
`int`	`bytecode()`	Returns the opcode value.
`boolean`	`isWide()`	Returns true if this is a pseudo-opcode modified by wide opcode.
`Opcode.Kind`	`kind()`	Returns operation kind.
`int`	`sizeIfFixed()`	Returns size of the instruction in bytes if fixed, or -1 otherwise.
`static Opcode`	`valueOf(String name)`	Returns the enum constant of this class with the specified name.
`static Opcode[]`	`values()`	Returns an array containing the constants of this enum class, in the order they are declared.

Methods declared in class Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods declared in class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

NOP

public static final Opcode NOP

Do nothing.

See Java Virtual Machine Specification:

6.5.nop nop

See Also:

ACONST_NULL

public static final Opcode ACONST_NULL

Push null.

See Java Virtual Machine Specification:

6.5.aconst_null aconst_null

See Also:

ICONST_M1

public static final Opcode ICONST_M1

Push int constant -1.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_0

public static final Opcode ICONST_0

Push int constant 0.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_1

public static final Opcode ICONST_1

Push int constant 1.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_2

public static final Opcode ICONST_2

Push int constant 2.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_3

public static final Opcode ICONST_3

Push int constant 3.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_4

public static final Opcode ICONST_4

Push int constant 4.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

ICONST_5

public static final Opcode ICONST_5

Push int constant 5.

See Java Virtual Machine Specification:

6.5.iconst_i iconst_

See Also:

LCONST_0

public static final Opcode LCONST_0

Push long constant 0L.

See Java Virtual Machine Specification:

6.5.lconst_l lconst_<l>

See Also:

LCONST_1

public static final Opcode LCONST_1

Push long constant 1L.

See Java Virtual Machine Specification:

6.5.lconst_l lconst_<l>

See Also:

FCONST_0

public static final Opcode FCONST_0

Push float constant 0.0F.

See Java Virtual Machine Specification:

6.5.fconst_f fconst_<f>

See Also:

FCONST_1

public static final Opcode FCONST_1

Push float constant 1.0F.

See Java Virtual Machine Specification:

6.5.fconst_f fconst_<f>

See Also:

FCONST_2

public static final Opcode FCONST_2

Push float constant 2.0F.

See Java Virtual Machine Specification:

6.5.fconst_f fconst_<f>

See Also:

DCONST_0

public static final Opcode DCONST_0

Push double constant 0.0D.

See Java Virtual Machine Specification:

6.5.dconst_d dconst_<d>

See Also:

DCONST_1

public static final Opcode DCONST_1

Push double constant 1.0D.

See Java Virtual Machine Specification:

6.5.dconst_d dconst_<d>

See Also:

BIPUSH

public static final Opcode BIPUSH

Push int value from sign-extension of immediate byte value.

See Java Virtual Machine Specification:

6.5.bipush bipush

See Also:

SIPUSH

public static final Opcode SIPUSH

Push int value from sign-extension of immediate short value.

See Java Virtual Machine Specification:

6.5.sipush sipush

See Also:

LDC

public static final Opcode LDC

Push item from run-time constant pool.

See Java Virtual Machine Specification:

6.5.ldc ldc

See Also:

LDC_W

public static final Opcode LDC_W

Push item from run-time constant pool (wide index).

See Java Virtual Machine Specification:

6.5.ldc_w ldc_w

See Also:

LDC2_W

public static final Opcode LDC2_W

Push long or double from run-time constant pool (wide index).

See Java Virtual Machine Specification:

6.5.ldc2_w ldc2_w

See Also:

ILOAD

public static final Opcode ILOAD

Load int from local variable.

See Java Virtual Machine Specification:

6.5.iload iload

See Also:

LLOAD

public static final Opcode LLOAD

Load long from local variable.

See Java Virtual Machine Specification:

6.5.lload lload

See Also:

FLOAD

public static final Opcode FLOAD

Load float from local variable.

See Java Virtual Machine Specification:

6.5.fload fload

See Also:

DLOAD

public static final Opcode DLOAD

Load double from local variable.

See Java Virtual Machine Specification:

6.5.dload dload

See Also:

ALOAD

public static final Opcode ALOAD

Load reference from local variable.

See Java Virtual Machine Specification:

6.5.aload aload

See Also:

ILOAD_0

public static final Opcode ILOAD_0

Load int from local variable slot 0.

See Java Virtual Machine Specification:

6.5.iload_n iload_<n>

See Also:

ILOAD_1

public static final Opcode ILOAD_1

Load int from local variable slot 1.

See Java Virtual Machine Specification:

6.5.iload_n iload_<n>

See Also:

ILOAD_2

public static final Opcode ILOAD_2

Load int from local variable slot 2.

See Java Virtual Machine Specification:

6.5.iload_n iload_<n>

See Also:

ILOAD_3

public static final Opcode ILOAD_3

Load int from local variable slot 3.

See Java Virtual Machine Specification:

6.5.iload_n iload_<n>

See Also:

LLOAD_0

public static final Opcode LLOAD_0

Load long from local variable slot 0.

See Java Virtual Machine Specification:

6.5.lload_n lload_<n>

See Also:

LLOAD_1

public static final Opcode LLOAD_1

Load long from local variable slot 1.

See Java Virtual Machine Specification:

6.5.lload_n lload_<n>

See Also:

LLOAD_2

public static final Opcode LLOAD_2

Load long from local variable slot 2.

See Java Virtual Machine Specification:

6.5.lload_n lload_<n>

See Also:

LLOAD_3

public static final Opcode LLOAD_3

Load long from local variable slot 3.

See Java Virtual Machine Specification:

6.5.lload_n lload_<n>

See Also:

FLOAD_0

public static final Opcode FLOAD_0

Load float from local variable slot 0.

See Java Virtual Machine Specification:

6.5.fload_n fload_<n>

See Also:

FLOAD_1

public static final Opcode FLOAD_1

Load float from local variable slot 1.

See Java Virtual Machine Specification:

6.5.fload_n fload_<n>

See Also:

FLOAD_2

public static final Opcode FLOAD_2

Load float from local variable slot 2.

See Java Virtual Machine Specification:

6.5.fload_n fload_<n>

See Also:

FLOAD_3

public static final Opcode FLOAD_3

Load float from local variable slot 3.

See Java Virtual Machine Specification:

6.5.fload_n fload_<n>

See Also:

DLOAD_0

public static final Opcode DLOAD_0

Load double from local variable slot 0.

See Java Virtual Machine Specification:

6.5.dload_n dload_<n>

See Also:

DLOAD_1

public static final Opcode DLOAD_1

Load double from local variable slot 1.

See Java Virtual Machine Specification:

6.5.dload_n dload_<n>

See Also:

DLOAD_2

public static final Opcode DLOAD_2

Load double from local variable slot 2.

See Java Virtual Machine Specification:

6.5.dload_n dload_<n>

See Also:

DLOAD_3

public static final Opcode DLOAD_3

Load double from local variable slot 3.

See Java Virtual Machine Specification:

6.5.dload_n dload_<n>

See Also:

ALOAD_0

public static final Opcode ALOAD_0

Load reference from local variable slot 0.

See Java Virtual Machine Specification:

6.5.aload_n aload_<n>

See Also:

ALOAD_1

public static final Opcode ALOAD_1

Load reference from local variable slot 1.

See Java Virtual Machine Specification:

6.5.aload_n aload_<n>

See Also:

ALOAD_2

public static final Opcode ALOAD_2

Load reference from local variable slot 2.

See Java Virtual Machine Specification:

6.5.aload_n aload_<n>

See Also:

ALOAD_3

public static final Opcode ALOAD_3

Load reference from local variable slot 3.

See Java Virtual Machine Specification:

6.5.aload_n aload_<n>

See Also:

IALOAD

public static final Opcode IALOAD

Load int from array.

See Java Virtual Machine Specification:

6.5.iaload iaload

See Also:

LALOAD

public static final Opcode LALOAD

Load long from array.

See Java Virtual Machine Specification:

6.5.laload laload

See Also:

FALOAD

public static final Opcode FALOAD

Load float from array.

See Java Virtual Machine Specification:

6.5.faload faload

See Also:

DALOAD

public static final Opcode DALOAD

Load double from array.

See Java Virtual Machine Specification:

6.5.daload daload

See Also:

AALOAD

public static final Opcode AALOAD

Load reference from array.

See Java Virtual Machine Specification:

6.5.aaload aaload

See Also:

BALOAD

public static final Opcode BALOAD

Load byte or boolean from array.

See Java Virtual Machine Specification:

6.5.baload baload

See Also:

CALOAD

public static final Opcode CALOAD

Load char from array.

See Java Virtual Machine Specification:

6.5.caload caload

See Also:

SALOAD

public static final Opcode SALOAD

Load short from array.

See Java Virtual Machine Specification:

6.5.saload saload

See Also:

ISTORE

public static final Opcode ISTORE

Store int into local variable.

See Java Virtual Machine Specification:

6.5.istore istore

See Also:

LSTORE

public static final Opcode LSTORE

Store long into local variable.

See Java Virtual Machine Specification:

6.5.lstore lstore

See Also:

FSTORE

public static final Opcode FSTORE

Store float into local variable.

See Java Virtual Machine Specification:

6.5.fstore fstore

See Also:

DSTORE

public static final Opcode DSTORE

Store double into local variable.

See Java Virtual Machine Specification:

6.5.dstore dstore

See Also:

ASTORE

public static final Opcode ASTORE

Store reference into local variable. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.astore astore

See Also:

ISTORE_0

public static final Opcode ISTORE_0

Store int into local variable slot 0.

See Java Virtual Machine Specification:

6.5.istore_n istore_<n>

See Also:

ISTORE_1

public static final Opcode ISTORE_1

Store int into local variable slot 1.

See Java Virtual Machine Specification:

6.5.istore_n istore_<n>

See Also:

ISTORE_2

public static final Opcode ISTORE_2

Store int into local variable slot 2.

See Java Virtual Machine Specification:

6.5.istore_n istore_<n>

See Also:

ISTORE_3

public static final Opcode ISTORE_3

Store int into local variable slot 3.

See Java Virtual Machine Specification:

6.5.istore_n istore_<n>

See Also:

LSTORE_0

public static final Opcode LSTORE_0

Store long into local variable slot 0.

See Java Virtual Machine Specification:

6.5.lstore_n lstore_<n>

See Also:

LSTORE_1

public static final Opcode LSTORE_1

Store long into local variable slot 1.

See Java Virtual Machine Specification:

6.5.lstore_n lstore_<n>

See Also:

LSTORE_2

public static final Opcode LSTORE_2

Store long into local variable slot 2.

See Java Virtual Machine Specification:

6.5.lstore_n lstore_<n>

See Also:

LSTORE_3

public static final Opcode LSTORE_3

Store long into local variable slot 3.

See Java Virtual Machine Specification:

6.5.lstore_n lstore_<n>

See Also:

FSTORE_0

public static final Opcode FSTORE_0

Store float into local variable slot 0.

See Java Virtual Machine Specification:

6.5.fstore_n fstore_<n>

See Also:

FSTORE_1

public static final Opcode FSTORE_1

Store float into local variable slot 1.

See Java Virtual Machine Specification:

6.5.fstore_n fstore_<n>

See Also:

FSTORE_2

public static final Opcode FSTORE_2

Store float into local variable slot 2.

See Java Virtual Machine Specification:

6.5.fstore_n fstore_<n>

See Also:

FSTORE_3

public static final Opcode FSTORE_3

Store float into local variable slot 3.

See Java Virtual Machine Specification:

6.5.fstore_n fstore_<n>

See Also:

DSTORE_0

public static final Opcode DSTORE_0

Store double into local variable slot 0.

See Java Virtual Machine Specification:

6.5.dstore_n dstore_<n>

See Also:

DSTORE_1

public static final Opcode DSTORE_1

Store double into local variable slot 1.

See Java Virtual Machine Specification:

6.5.dstore_n dstore_<n>

See Also:

DSTORE_2

public static final Opcode DSTORE_2

Store double into local variable slot 2.

See Java Virtual Machine Specification:

6.5.dstore_n dstore_<n>

See Also:

DSTORE_3

public static final Opcode DSTORE_3

Store double into local variable slot 3.

See Java Virtual Machine Specification:

6.5.dstore_n dstore_<n>

See Also:

ASTORE_0

public static final Opcode ASTORE_0

Store reference into local variable slot 0. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.astore_n astore_<n>

See Also:

ASTORE_1

public static final Opcode ASTORE_1

Store reference into local variable slot 1. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.astore_n astore_<n>

See Also:

ASTORE_2

public static final Opcode ASTORE_2

Store reference into local variable slot 2. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.astore_n astore_<n>

See Also:

ASTORE_3

public static final Opcode ASTORE_3

Store reference into local variable slot 3. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.astore_n astore_<n>

See Also:

IASTORE

public static final Opcode IASTORE

Store into int array.

See Java Virtual Machine Specification:

6.5.iastore iastore

See Also:

LASTORE

public static final Opcode LASTORE

Store into long array.

See Java Virtual Machine Specification:

6.5.lastore lastore

See Also:

FASTORE

public static final Opcode FASTORE

Store into float array.

See Java Virtual Machine Specification:

6.5.fastore fastore

See Also:

DASTORE

public static final Opcode DASTORE

Store into double array.

See Java Virtual Machine Specification:

6.5.dastore dastore

See Also:

AASTORE

public static final Opcode AASTORE

Store into reference array.

See Java Virtual Machine Specification:

6.5.aastore aastore

See Also:

BASTORE

public static final Opcode BASTORE

Store into byte or boolean array.

See Java Virtual Machine Specification:

6.5.bastore bastore

See Also:

CASTORE

public static final Opcode CASTORE

Store into char array.

See Java Virtual Machine Specification:

6.5.castore castore

See Also:

SASTORE

public static final Opcode SASTORE

Store into short array.

See Java Virtual Machine Specification:

6.5.sastore sastore

See Also:

POP

public static final Opcode POP

Pop the top operand stack value.

See Java Virtual Machine Specification:

6.5.pop pop

See Also:

POP2

public static final Opcode POP2

Pop the top one or two operand stack values.

See Java Virtual Machine Specification:

6.5.pop2 pop2

See Also:

DUP

public static final Opcode DUP

Duplicate the top operand stack value.

See Java Virtual Machine Specification:

6.5.dup dup

See Also:

DUP_X1

public static final Opcode DUP_X1

Duplicate the top operand stack value and insert two values down.

See Java Virtual Machine Specification:

6.5.dup_x1 dup_x1

See Also:

DUP_X2

public static final Opcode DUP_X2

Duplicate the top operand stack value and insert two or three values down.

See Java Virtual Machine Specification:

6.5.dup_x2 dup_x2

See Also:

DUP2

public static final Opcode DUP2

Duplicate the top one or two operand stack values.

See Java Virtual Machine Specification:

6.5.dup2 dup2

See Also:

DUP2_X1

public static final Opcode DUP2_X1

Duplicate the top one or two operand stack values and insert two or three values down.

See Java Virtual Machine Specification:

6.5.dup2_x1 dup2_x1

See Also:

DUP2_X2

public static final Opcode DUP2_X2

Duplicate the top one or two operand stack values and insert two, three, or four values down.

See Java Virtual Machine Specification:

6.5.dup2_x2 dup2_x2

See Also:

SWAP

public static final Opcode SWAP

Swap the top two operand stack values.

See Java Virtual Machine Specification:

6.5.swap swap

See Also:

IADD

public static final Opcode IADD

Add int.

See Java Virtual Machine Specification:

6.5.iadd iadd

See Also:

LADD

public static final Opcode LADD

Add long.

See Java Virtual Machine Specification:

6.5.ladd ladd

See Also:

FADD

public static final Opcode FADD

Add float.

See Java Virtual Machine Specification:

6.5.fadd fadd

See Also:

DADD

public static final Opcode DADD

Add double.

See Java Virtual Machine Specification:

6.5.dadd dadd

See Also:

ISUB

public static final Opcode ISUB

Subtract int.

See Java Virtual Machine Specification:

6.5.isub isub

See Also:

LSUB

public static final Opcode LSUB

Subtract long.

See Java Virtual Machine Specification:

6.5.lsub lsub

See Also:

FSUB

public static final Opcode FSUB

Subtract float.

See Java Virtual Machine Specification:

6.5.fsub fsub

See Also:

DSUB

public static final Opcode DSUB

Subtract double.

See Java Virtual Machine Specification:

6.5.dsub dsub

See Also:

IMUL

public static final Opcode IMUL

Multiply int.

See Java Virtual Machine Specification:

6.5.imul imul

See Also:

LMUL

public static final Opcode LMUL

Multiply long.

See Java Virtual Machine Specification:

6.5.lmul lmul

See Also:

FMUL

public static final Opcode FMUL

Multiply float.

See Java Virtual Machine Specification:

6.5.fmul fmul

See Also:

DMUL

public static final Opcode DMUL

Multiply double.

See Java Virtual Machine Specification:

6.5.dmul dmul

See Also:

IDIV

public static final Opcode IDIV

Divide int.

See Java Virtual Machine Specification:

6.5.idiv idiv

See Also:

LDIV

public static final Opcode LDIV

Divide long.

See Java Virtual Machine Specification:

6.5.ldiv ldiv

See Also:

FDIV

public static final Opcode FDIV

Divide float.

See Java Virtual Machine Specification:

6.5.fdiv fdiv

See Also:

DDIV

public static final Opcode DDIV

Divide double.

See Java Virtual Machine Specification:

6.5.ddiv ddiv

See Also:

IREM

public static final Opcode IREM

Remainder int.

See Java Virtual Machine Specification:

6.5.irem irem

See Also:

LREM

public static final Opcode LREM

Remainder long.

See Java Virtual Machine Specification:

6.5.lrem lrem

See Also:

FREM

public static final Opcode FREM

Remainder float.

See Java Virtual Machine Specification:

6.5.frem frem

See Also:

DREM

public static final Opcode DREM

Remainder double.

See Java Virtual Machine Specification:

6.5.drem drem

See Also:

INEG

public static final Opcode INEG

Negate int.

See Java Virtual Machine Specification:

6.5.ineg ineg

See Also:

LNEG

public static final Opcode LNEG

Negate long.

See Java Virtual Machine Specification:

6.5.lneg lneg

See Also:

FNEG

public static final Opcode FNEG

Negate float.

See Java Virtual Machine Specification:

6.5.fneg fneg

See Also:

DNEG

public static final Opcode DNEG

Negate double.

See Java Virtual Machine Specification:

6.5.dneg dneg

See Also:

ISHL

public static final Opcode ISHL

Shift left int.

See Java Virtual Machine Specification:

6.5.ishl ishl

See Also:

LSHL

public static final Opcode LSHL

Shift left long.

See Java Virtual Machine Specification:

6.5.lshl lshl

See Also:

ISHR

public static final Opcode ISHR

Arithmetic shift right int.

See Java Virtual Machine Specification:

6.5.ishr ishr

See Also:

LSHR

public static final Opcode LSHR

Arithmetic shift right long.

See Java Virtual Machine Specification:

6.5.lshr lshr

See Also:

IUSHR

public static final Opcode IUSHR

Logical shift right int.

See Java Virtual Machine Specification:

6.5.iushr iushr

See Also:

LUSHR

public static final Opcode LUSHR

Logical shift right long.

See Java Virtual Machine Specification:

6.5.lushr lushr

See Also:

IAND

public static final Opcode IAND

Bitwise AND int.

API Note:

This may be used to implement boolean AND.

See Java Virtual Machine Specification:

6.5.iand iand

See Also:

LAND

public static final Opcode LAND

Bitwise AND long.

See Java Virtual Machine Specification:

6.5.land land

See Also:

IOR

public static final Opcode IOR

Bitwise OR int.

API Note:

This may be used to implement boolean OR.

See Java Virtual Machine Specification:

6.5.ior ior

See Also:

LOR

public static final Opcode LOR

Bitwise OR long.

See Java Virtual Machine Specification:

6.5.lor lor

See Also:

IXOR

public static final Opcode IXOR

Bitwise XOR int.

API Note:

This may be used to implement boolean XOR.

See Java Virtual Machine Specification:

6.5.ixor ixor

See Also:

LXOR

public static final Opcode LXOR

Bitwise XOR long.

See Java Virtual Machine Specification:

6.5.lxor lxor

See Also:

IINC

public static final Opcode IINC

Increment int local variable by constant.

See Java Virtual Machine Specification:

6.5.iinc iinc

See Also:

I2L

public static final Opcode I2L

Convert int to long.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2l i2l

See Also:

I2F

public static final Opcode I2F

Convert int to float.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2f i2f

See Also:

I2D

public static final Opcode I2D

Convert int to double.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2d i2d

See Also:

L2I

public static final Opcode L2I

Convert long to int.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.l2i l2i

See Also:

L2F

public static final Opcode L2F

Convert long to float.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.l2f l2f

See Also:

L2D

public static final Opcode L2D

Convert long to double.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.l2d l2d

See Also:

F2I

public static final Opcode F2I

Convert float to int.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.f2i f2i

See Also:

F2L

public static final Opcode F2L

Convert float to long.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.f2l f2l

See Also:

F2D

public static final Opcode F2D

Convert float to double.

See Java Language Specification:

5.1.2 Widening Primitive Conversion

See Java Virtual Machine Specification:

6.5.f2d f2d

See Also:

D2I

public static final Opcode D2I

Convert double to int.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.d2i d2i

See Also:

D2L

public static final Opcode D2L

Convert double to long.

See Java Virtual Machine Specification:

6.5.d2l d2l

See Also:

D2F

public static final Opcode D2F

Convert double to float.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.d2f d2f

See Also:

I2B

public static final Opcode I2B

Convert int to byte. This is as if storing the computational int into a byte and loading it back.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2b i2b

See Also:

I2C

public static final Opcode I2C

Convert int to char. This is as if storing the computational int into a char and loading it back.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2c i2c

See Also:

I2S

public static final Opcode I2S

Convert int to short. This is as if storing the computational int into a short and loading it back.

See Java Language Specification:

5.1.3 Narrowing Primitive Conversion

See Java Virtual Machine Specification:

6.5.i2s i2s

See Also:

LCMP

public static final Opcode LCMP

Compare long.

See Java Virtual Machine Specification:

6.5.lcmp lcmp

See Also:

FCMPL

public static final Opcode FCMPL

Compare float. Produces -1 if any operand is NaN.

See Java Virtual Machine Specification:

6.5.fcmp_op fcmp<op>

See Also:

FCMPG

public static final Opcode FCMPG

Compare float. Produces 1 if any operand is NaN.

See Java Virtual Machine Specification:

6.5.fcmp_op fcmp<op>

See Also:

DCMPL

public static final Opcode DCMPL

Compare double. Produces -1 if any operand is NaN.

See Java Virtual Machine Specification:

6.5.dcmp_op dcmp<op>

See Also:

DCMPG

public static final Opcode DCMPG

Compare double. Produces 1 if any operand is NaN.

See Java Virtual Machine Specification:

6.5.dcmp_op dcmp<op>

See Also:

IFEQ

public static final Opcode IFEQ

Branch if int comparison == 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IFNE

public static final Opcode IFNE

Branch if int comparison != 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IFLT

public static final Opcode IFLT

Branch if int comparison < 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IFGE

public static final Opcode IFGE

Branch if int comparison >= 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IFGT

public static final Opcode IFGT

Branch if int comparison > 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IFLE

public static final Opcode IFLE

Branch if int comparison <= 0 succeeds.

See Java Virtual Machine Specification:

6.5.if_cond if_<cond>

See Also:

IF_ICMPEQ

public static final Opcode IF_ICMPEQ

Branch if int comparison operand1 == operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ICMPNE

public static final Opcode IF_ICMPNE

Branch if int comparison operand1 != operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ICMPLT

public static final Opcode IF_ICMPLT

Branch if int comparison operand1 < operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ICMPGE

public static final Opcode IF_ICMPGE

Branch if int comparison operand1 >= operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ICMPGT

public static final Opcode IF_ICMPGT

Branch if int comparison operand1 > operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ICMPLE

public static final Opcode IF_ICMPLE

Branch if int comparison operand1 <= operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_icmp_cond if_icmp<cond>

See Also:

IF_ACMPEQ

public static final Opcode IF_ACMPEQ

Branch if reference comparison operand1 == operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_acmp_cond if_acmp<cond>

See Also:

IF_ACMPNE

public static final Opcode IF_ACMPNE

Branch if reference comparison operand1 != operand2 succeeds.

See Java Virtual Machine Specification:

6.5.if_acmp_cond if_acmp<cond>

See Also:

GOTO

public static final Opcode GOTO

Branch always.

See Java Virtual Machine Specification:

6.5.goto goto

See Also:

JSR

public static final Opcode JSR

(Discontinued) Jump subroutine; last used in major version 50.

See Java Virtual Machine Specification:

4.9.1 Static Constraints
6.5.jsr jsr

See Also:

RET

public static final Opcode RET

(Discontinued) Return from subroutine; last used in major version 50.

See Java Virtual Machine Specification:

4.9.1 Static Constraints
6.5.ret ret

See Also:

TABLESWITCH

public static final Opcode TABLESWITCH

Access jump table by index and jump.

See Java Virtual Machine Specification:

6.5.tableswitch tableswitch

See Also:

LOOKUPSWITCH

public static final Opcode LOOKUPSWITCH

Access jump table by key match and jump.

See Java Virtual Machine Specification:

6.5.lookupswitch lookupswitch

See Also:

IRETURN

public static final Opcode IRETURN

Return int from method.

See Java Virtual Machine Specification:

6.5.ireturn ireturn

See Also:

LRETURN

public static final Opcode LRETURN

Return long from method.

See Java Virtual Machine Specification:

6.5.lreturn lreturn

See Also:

FRETURN

public static final Opcode FRETURN

Return float from method.

See Java Virtual Machine Specification:

6.5.freturn freturn

See Also:

DRETURN

public static final Opcode DRETURN

Return double from method.

See Java Virtual Machine Specification:

6.5.dreturn dreturn

See Also:

ARETURN

public static final Opcode ARETURN

Return reference from method.

See Java Virtual Machine Specification:

6.5.areturn areturn

See Also:

RETURN

public static final Opcode RETURN

Return void from method.

See Java Virtual Machine Specification:

6.5.return return

See Also:

GETSTATIC

public static final Opcode GETSTATIC

Get static field from class.

See Java Virtual Machine Specification:

6.5.getstatic getstatic

See Also:

PUTSTATIC

public static final Opcode PUTSTATIC

Set static field in class.

See Java Virtual Machine Specification:

6.5.putstatic putstatic

See Also:

GETFIELD

public static final Opcode GETFIELD

Fetch field from object.

See Java Virtual Machine Specification:

6.5.getfield getfield

See Also:

PUTFIELD

public static final Opcode PUTFIELD

Set field in object.

See Java Virtual Machine Specification:

6.5.putfield putfield

See Also:

INVOKEVIRTUAL

public static final Opcode INVOKEVIRTUAL

Invoke instance method; dispatch based on class.

See Java Virtual Machine Specification:

6.5.invokevirtual invokevirtual

See Also:

INVOKESPECIAL

public static final Opcode INVOKESPECIAL

Invoke instance method; direct invocation of instance initialization methods and methods of the current class and its supertypes.

See Java Virtual Machine Specification:

6.5.invokevirtual invokevirtual

See Also:

INVOKESTATIC

public static final Opcode INVOKESTATIC

Invoke a class (static) method.

See Java Virtual Machine Specification:

6.5.invokestatic invokestatic

See Also:

INVOKEINTERFACE

public static final Opcode INVOKEINTERFACE

Invoke interface method.

See Java Virtual Machine Specification:

6.5.invokeinterface invokeinterface

See Also:

INVOKEDYNAMIC

public static final Opcode INVOKEDYNAMIC

Invoke a dynamically-computed call site.

See Java Virtual Machine Specification:

6.5.invokedynamic invokedynamic

See Also:

NEW

public static final Opcode NEW

Create new object.

See Java Virtual Machine Specification:

6.5.new new

See Also:

NEWARRAY

public static final Opcode NEWARRAY

Create new array.

See Java Virtual Machine Specification:

6.5.newarray newarray

See Also:

ANEWARRAY

public static final Opcode ANEWARRAY

Create new array of reference.

See Java Virtual Machine Specification:

6.5.anewarray anewarray

See Also:

ARRAYLENGTH

public static final Opcode ARRAYLENGTH

Get length of array.

See Java Virtual Machine Specification:

6.5.arraylength arraylength

See Also:

ATHROW

public static final Opcode ATHROW

Throw exception or error.

See Java Virtual Machine Specification:

6.5.athrow athrow

See Also:

CHECKCAST

public static final Opcode CHECKCAST

Check whether object is of given type.

See Java Virtual Machine Specification:

6.5.checkcast checkcast

See Also:

INSTANCEOF

public static final Opcode INSTANCEOF

Determine if object is of given type.

See Java Virtual Machine Specification:

6.5.instanceof instanceof

See Also:

MONITORENTER

public static final Opcode MONITORENTER

Enter monitor for object.

See Java Virtual Machine Specification:

6.5.monitorenter monitorenter

See Also:

MONITOREXIT

public static final Opcode MONITOREXIT

Exit monitor for object.

See Java Virtual Machine Specification:

6.5.monitorexit monitorexit

See Also:

MULTIANEWARRAY

public static final Opcode MULTIANEWARRAY

Create new multidimensional array.

See Java Virtual Machine Specification:

6.5.multianewarray multianewarray

See Also:

IFNULL

public static final Opcode IFNULL

Branch if reference is null.

See Java Virtual Machine Specification:

6.5.ifnull ifnull

See Also:

IFNONNULL

public static final Opcode IFNONNULL

Branch if reference is not null.

See Java Virtual Machine Specification:

6.5.ifnonnull ifnonnull

See Also:

GOTO_W

public static final Opcode GOTO_W

Branch always (wide index).

See Java Virtual Machine Specification:

6.5.goto_w goto_w

See Also:

JSR_W

public static final Opcode JSR_W

(Discontinued) Jump subroutine (wide index); last used in major version 50.

See Java Virtual Machine Specification:

4.9.1 Static Constraints
6.5.jsr_w jsr_w

See Also:

ILOAD_W

public static final Opcode ILOAD_W

Load int from local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.iload iload

See Also:

LLOAD_W

public static final Opcode LLOAD_W

Load long from local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.lload lload

See Also:

FLOAD_W

public static final Opcode FLOAD_W

Load float from local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.fload fload

See Also:

DLOAD_W

public static final Opcode DLOAD_W

Load double from local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.dload dload

See Also:

ALOAD_W

public static final Opcode ALOAD_W

Load reference from local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.aload aload

See Also:

ISTORE_W

public static final Opcode ISTORE_W

Store int into local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.istore istore

See Also:

LSTORE_W

public static final Opcode LSTORE_W

Store long into local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.lstore lstore

See Also:

FSTORE_W

public static final Opcode FSTORE_W

Store float into local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.fstore fstore

See Also:

DSTORE_W

public static final Opcode DSTORE_W

Store double into local variable (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.dstore dstore

See Also:

ASTORE_W

public static final Opcode ASTORE_W

Store reference into local variable (wide index). This is a wide-modified pseudo-opcode. Can also store the returnAddress type.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.astore astore

See Also:

RET_W

public static final Opcode RET_W

(Discontinued) Return from subroutine (wide index); last used in major version 50. This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

4.9.1 Static Constraints
6.5.wide wide
6.5.ret ret

See Also:

IINC_W

public static final Opcode IINC_W

Increment local variable by constant (wide index). This is a wide-modified pseudo-opcode.

See Java Virtual Machine Specification:

6.5.wide wide
6.5.iinc iinc

See Also:

Method Details

values

public static Opcode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:: an array containing the constants of this enum class, in the order they are declared

valueOf

public static Opcode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:: name - the name of the enum constant to be returned.
Returns:: the enum constant with the specified name
Throws:: IllegalArgumentException - if this enum class has no constant with the specified name; NullPointerException - if the argument is null

bytecode

public int bytecode()

Returns the opcode value. For wide pseudo-opcodes, returns the first 2 bytes of the instruction, which are the wide opcode 196 (0xC4) and the functional opcode, as a U2 value.

Returns:: the opcode value

isWide

public boolean isWide()

Returns true if this is a pseudo-opcode modified by wide opcode.

wide extends local variable index by additional bytes.

Returns:

true if this is a pseudo-opcode modified by wide opcode

See Java Virtual Machine Specification:

6.5.wide wide

See Also:

sizeIfFixed

public int sizeIfFixed()

Returns size of the instruction in bytes if fixed, or -1 otherwise. This size includes the opcode itself.

Returns:

size of the instruction in bytes if fixed, or -1 otherwise

See Also:

kind

public Opcode.Kind kind()

Returns operation kind. Each kind of operation has its own modeling interface to model instructions belonging to that kind.

Returns:: operation kind

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/25/docs/api/java.base/java/lang/classfile/Opcode.html