鼠标的移入移出效果

      继承JButton，使用borderFactory类，当鼠标移入、移出、被点击时有不同的外观。  

import javax.swing.*; 
import javax.swing.border.*; 
import java.awt.event.*; 
import java.awt.*; 
/** *//** 
 * JButton类按钮的一种扩展，当鼠标移入、移出、被点击时有不同的外观 
 */ 
public class ZButton extends JButton 
{ 
    private Border borderOut; 
    private Border borderIn; 
    private Border borderPressed; 

    public ZButton() 
    { 
        init(); 
    } 
    /** *//**初始化*/ 
    private void init() 
    { 
        borderOut     = BorderFactory.createEmptyBorder();         borderIn=BorderFactory.createTitledBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED,Color.white,Color.white, new Color(148, 145, 140),new Color(103, 101, 98)),"鼠标进入",TitledBorder.CENTER,TitledBorder.BELOW_TOP);
borderPressed=BorderFactory.createTitledBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.white,Color.white,new Color(148, 145, 140),new Color(103, 101, 98)),"鼠标摁下",TitledBorder.CENTER,TitledBorder.BELOW_TOP);
        this.setBorder( borderOut ); 

        this.addMouseListener(new java.awt.event.MouseAdapter() 
        { 
            public void mouseEntered(MouseEvent e) { 
                thisButton_mouseEntered(e); 
            } 

            public void mouseExited(MouseEvent e) { 
                thisButton_mouseExited(e); 
            } 

            public void mousePressed(MouseEvent e) { 
                thisButton_mousePressed(e); 
            } 

            public void mouseReleased(MouseEvent e) { 
                thisButton_mouseReleased(e); 
            } 

        }); 
    } 
    /** *//**鼠标移入时的外观*/ 
    void thisButton_mouseEntered(MouseEvent e){ 
        if( this.isEnabled() ) 
            this.setBorder( borderIn ); 
    } 
    /** *//**鼠标移出时的外观*/ 
    void thisButton_mouseExited(MouseEvent e){ 
        this.setBorder( borderOut ); 
    } 
    /** *//**鼠标被点击时的外观*/ 
    void thisButton_mousePressed(MouseEvent e){ 
        if( this.isEnabled()) 
            this.setBorder( borderPressed ); 
    } 
    /** *//**鼠标被释放时的外观*/ 
    void thisButton_mouseReleased(MouseEvent e) 
    { 
        if( (this.getBounds().contains(e.getX(), e.getY())) && this.isEnabled() ) 
            this.setBorder( borderIn ); 
        else 
            this.setBorder( borderOut ); 
    } 


}

       ZButton继承了JButton，可以直接使用ZButton,下面是测试程序，一定要把ZButton的源文件和测试程序放在同一个目录，否则须设置环境变量.

import javax.swing.*; 
import javax.swing.border.*; 
import java.awt.event.*; 
import java.awt.*;

public class Test{
      public Test(){
     JFrame f= new JFrame();
     Container contentPane=f.getContentPane();
     ZButton a=new ZButton();
     contentPane.add(a);
     f.setTitle("just a test");
     f.setSize(new Dimension(200,80));
     f.setVisible(true);

}
 

     public static void main(String []args){
          Test q=new Test();
}
}