ch9_40.java

来自「java图形用户界面设计 包括如何创建窗体 设计界面 管理布局 绘制图形 」· Java 代码 · 共 49 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Vector;
import javax.swing.event.*;
public class ch9_40 extends JFrame implements ListSelectionListener
{
	JList lt=null;
	JLabel jb=null;
	String [] s={"西瓜","苹果","草莓","西红柿","香蕉","葡萄"};
	public ch9_40()
	{
		super("测试窗口");
		setBounds(20,20,500,300);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String [] args)
	{
		ch9_40 f=new ch9_40();
		
		
		f.lt=new JList(f.s);
		f.lt.setVisibleRowCount(5);
		f.lt.setBorder(BorderFactory.createTitledBorder("水果"));
		f.lt.addListSelectionListener(f);
		
		f.jb=new JLabel();
		
		f.getContentPane().add(f.jb,BorderLayout.NORTH);
		f.getContentPane().add(new JScrollPane(f.lt),BorderLayout.CENTER);
				
		
		f.pack();
		f.show();
	}
	public void valueChanged(ListSelectionEvent e)
	{
		int tmp=0;
		String stmp="你目前选取是:";
		int [] index=lt.getSelectedIndices();
		for(int i=0;i<index.length;i++)
		{
			tmp=index[i];
			stmp=stmp+s[tmp]+"  ";
		}
		jb.setText(stmp);
	}
}