Class EmptyBorder

java.lang.Object

javax.swing.border.AbstractBorder

javax.swing.border.EmptyBorder

All Implemented Interfaces:: Serializable, Border

Direct Known Subclasses:: BorderUIResource.EmptyBorderUIResource, MatteBorder

public class EmptyBorder extends AbstractBorder implements Serializable

A class which provides an empty, transparent border which takes up space but does no drawing.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans has been added to the java.beans package. Please see XMLEncoder.

Field Summary

Modifier and Type	Field	Description
`protected int`	`bottom`	The bottom inset of the border.
`protected int`	`left`	The left inset of the border.
`protected int`	`right`	The right inset of the border.
`protected int`	`top`	The top inset of the border.

Constructor Summary

Constructor	Description
`EmptyBorder(int top, int left, int bottom, int right)`	Creates an empty border with the specified insets.
`EmptyBorder(Insets borderInsets)`	Creates an empty border with the specified insets.

Method Summary

Modifier and Type	Method	Description
`Insets`	`getBorderInsets()`	Returns the insets of the border.
`Insets`	`getBorderInsets(Component c, Insets insets)`	Reinitialize the insets parameter with this Border's current Insets.
`boolean`	`isBorderOpaque()`	Returns whether or not the border is opaque.
`void`	`paintBorder(Component c, Graphics g, int x, int y, int width, int height)`	Does no drawing by default.

Methods declared in class AbstractBorder

getBaseline, getBaselineResizeBehavior, getBorderInsets, getInteriorRectangle, getInteriorRectangle

Modifier and Type	Method	Description
`int`	`getBaseline(Component c, int width, int height)`	Returns the baseline.
`Component.BaselineResizeBehavior`	`getBaselineResizeBehavior(Component c)`	Returns an enum indicating how the baseline of a component changes as the size changes.
`Insets`	`getBorderInsets(Component c)`	This default implementation returns a new `Insets` object that is initialized by the `AbstractBorder.getBorderInsets(Component,Insets)` method.
`Rectangle`	`getInteriorRectangle(Component c, int x, int y, int width, int height)`	This convenience method calls the static method.
`static Rectangle`	`getInteriorRectangle(Component c, Border b, int x, int y, int width, int height)`	Returns a rectangle using the arguments minus the insets of the border.

Methods declared in class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Field Details

left

protected int left

The left inset of the border.

right

protected int right

The right inset of the border.

top

protected int top

The top inset of the border.

bottom

protected int bottom

The bottom inset of the border.

Constructor Details

EmptyBorder

public EmptyBorder(int top, int left, int bottom, int right)

Creates an empty border with the specified insets.

Parameters:: top - the top inset of the border; left - the left inset of the border; bottom - the bottom inset of the border; right - the right inset of the border

EmptyBorder

@ConstructorProperties("borderInsets") public EmptyBorder(Insets borderInsets)

Creates an empty border with the specified insets.

Parameters:: borderInsets - the insets of the border
Throws:: NullPointerException - if the specified borderInsets is null

Method Details

paintBorder

public void paintBorder(Component c, Graphics g, int x, int y, int width, int height)

Does no drawing by default.

Specified by:: paintBorder in interface Border
Overrides:: paintBorder in class AbstractBorder
Parameters:: c - the component for which this border is being painted; g - the paint graphics; x - the x position of the painted border; y - the y position of the painted border; width - the width of the painted border; height - the height of the painted border

getBorderInsets

public Insets getBorderInsets(Component c, Insets insets)

Reinitialize the insets parameter with this Border's current Insets.

Overrides:: getBorderInsets in class AbstractBorder
Parameters:: c - the component for which this border insets value applies; insets - the object to be reinitialized
Returns:: the insets object
Throws:: NullPointerException - if the specified insets is null

getBorderInsets

public Insets getBorderInsets()

Returns the insets of the border.

Returns:: an Insets object containing the insets from top, left, bottom and right
Since:: 1.3

isBorderOpaque

public boolean isBorderOpaque()

Returns whether or not the border is opaque. Returns false by default.

Specified by:: isBorderOpaque in interface Border
Overrides:: isBorderOpaque in class AbstractBorder
Returns:: false

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