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package javax.swing.border;

import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.Component;


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.



Author:David Kloba, Amy Fowler
See Also:
/**
 * Interface describing an object capable of rendering a border
 * around the edges of a swing component.
 * For examples of using borders see
 * <a href="http://docs.oracle.com/javase/tutorial/uiswing/components/border.html">How to Use Borders</a>,
 * a section in <em>The Java Tutorial.</em>
 * <p>
 * In the Swing component set, borders supercede Insets as the
 * mechanism for creating a (decorated or plain) area around the
 * edge of a component.
 * <p>
 * Usage Notes:
 * <ul>
 * <li>Use EmptyBorder to create a plain border (this mechanism
 *     replaces its predecessor, <code>setInsets</code>).
 * <li>Use CompoundBorder to nest multiple border objects, creating
 *     a single, combined border.
 * <li>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.
 * <li>Additional border styles include BevelBorder, SoftBevelBorder,
 *     EtchedBorder, LineBorder, TitledBorder, and MatteBorder.
 * <li>To create a new border class, subclass AbstractBorder.
 * </ul>
 *
 * @author David Kloba
 * @author Amy Fowler
 * @see javax.swing.BorderFactory
 * @see EmptyBorder
 * @see CompoundBorder
 */
public interface Border
{
    
Paints the border for the specified component with the specified
position and size.

Params:
  • 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
/**
     * Paints the border for the specified component with the specified
     * position and size.
     *
     * @param c the component for which this border is being painted
     * @param g the paint graphics
     * @param x the x position of the painted border
     * @param y the y position of the painted border
     * @param width the width of the painted border
     * @param height the height of the painted border
     */
    void paintBorder(Component c, Graphics g, int x, int y, int width, int height);

    
Returns the insets of the border.

Params:
  • c – the component for which this border insets value applies
Returns:an Insets object containing the insets from top, left, bottom and right of this Border
/**
     * Returns the insets of the border.
     *
     * @param c the component for which this border insets value applies
     * @return an {@code Insets} object containing the insets from top, left,
     *         bottom and right of this {@code Border}
     */
    Insets getBorderInsets(Component c);

    
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.

Returns:true if this Border is opaque
/**
     * 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.
     *
     * @return true if this {@code Border} is opaque
     */
    boolean isBorderOpaque();
}