jlistdemo.java

学习Java的一些基本课件和源代码 对于初学者很有帮助的

//JListDemo.java
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;

public class JListDemo extends JFrame implements ListSelectionListener{
	private JList colorList;
	private Container container;
	private final String colorNames[]={"黑色","蓝色","蓝绿色","深灰色",
	"灰色","绿色","浅灰色","紫红色","橙色","粉红色","红色","白色","黄色"};
	
	private final Color colors[]={Color.BLACK,Color.BLUE,Color.CYAN,Color.darkGray,
	Color.GRAY,Color.GREEN,Color.LIGHT_GRAY,Color.MAGENTA,Color.ORANGE,Color.PINK,
	Color.RED,Color.WHITE,Color.YELLOW};
	
	JScrollPane scrollPane;
	
	public JListDemo()
	{
		super("JList测试");
		container=getContentPane();
		container.setLayout(null);
		
		colorList=new JList(colorNames);
		colorList.setVisibleRowCount(5);
		colorList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		
		//colorList.setBounds();
		scrollPane=new JScrollPane(colorList);
		scrollPane.setBounds(100,10,150,100);
		container.add(scrollPane);
		colorList.addListSelectionListener(this);
		
		setSize(350,150);
		setVisible(true);
		
	}
	
	public void valueChanged(ListSelectionEvent event)
	{
		container.setBackground(colors[colorList.getSelectedIndex()]);
		
	}
	
	public static void main(String args[])
	{
		JListDemo application=new JListDemo();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}