Border (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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javax.swing.border
Interface Border

All Known Implementing Classes:: AbstractBorder, BasicBorders.SplitPaneBorder, BorderUIResource

public interface Border

Interface describing an object capable of rendering a border around the edges of a swing component. For examples of using borders see How to Use Borders, a section in The Java Tutorial.

In the Swing component set, borders supercede Insets as the mechanism for creating a (decorated or plain) area around the edge of a component.

Usage Notes:

Use EmptyBorder to create a plain border (this mechanism replaces its predecessor, setInsets).
Use CompoundBorder to nest multiple border objects, creating a single, combined border.
Border instances are designed to be shared. Rather than creating a new border object using one of border classes, use the BorderFactory methods, which produces a shared instance of the common border types.
Additional border styles include BevelBorder, SoftBevelBorder, EtchedBorder, LineBorder, TitledBorder, and MatteBorder.
To create a new border class, subclass AbstractBorder.

See Also:: BorderFactory, EmptyBorder, CompoundBorder

Method Summary

Insets getBorderInsets(Component c)
          Returns the insets of the border.

boolean isBorderOpaque()
          Returns whether or not the border is opaque.

void paintBorder(Component c, Graphics g, int x, int y, int width, int height)
          Paints the border for the specified component with the specified position and size.

Method Detail

paintBorder

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

Paints the border for the specified component with the specified position and size.

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)

Returns the insets of the border.

Parameters:: c - the component for which this border insets value applies

isBorderOpaque

public boolean isBorderOpaque()

Returns whether or not the border is opaque. If the border is opaque, it is responsible for filling in it's own background when painting.