ｊａｖａ颜色控制二－－－JColorChooser

//ShowColors2.java
//Demonstrating JColorChooser.

//Java core packages
import java.awt.*;
import java.awt.event.*;

//Java extension packages
import javax.swing.*;

public class ShowColors2 extends JFrame
{
 private JButton changeColorButton;
 private Color color = Color.lightGray;
 private Container container;
 
 //set up GUI
 public ShowColors2()
 {
  super("Using JColorChooser");
  
  container = getContentPane();
  container.setLayout(new FlowLayout());
  
  //set up changeColorButton and register its event handler
  changeColorButton = new JButton( "Change Color" );
  
  changeColorButton.addActionListener(
   //anonymous inner class
   new ActionListener()
   {
    public void actionPerformed(ActionEvent event )
    {
     color = JColorChooser.showDialog(ShowColors2.this,"Choose a color",color);
     
     //set default color,if no color is returned
     if(color == null )
     color = Color.lightGray;
     
     //container.setBackground( color );
    }//end actionPerformd
    
   }//end of ActionListioner
           );//end call to addActionListener
  container.add( changeColorButton );
  
  setSize( 400,130 );
  setVisible( true );
 }
 
 //execute application
 public static void main(String arges[] )
 {
  ShowColors2 application = new ShowColors2();
  
  application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
 }
}

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