listtest.java

来自「这是清华大学编写的JAVA教材中所有题目的源代码！」· Java 代码 · 共 55 行

import java.awt.*;
import java.awt.event.*;

class ListTest extends Frame implements ItemListener,ActionListener
{
	TextArea ta=new TextArea(5,30);
	TextField tf=new TextField(30);
	List moviestars=new List(6,true);	
	
	public ListTest(String title) 
	{
		super(title);

		moviestars.add("安东尼奥.班德拉斯");
		moviestars.add("莱昂纳多.迪卡普尼奥");
		moviestars.add("桑德.布洛克");
		moviestars.add("休.葛兰特");
		moviestars.add("朱莉亚.罗泊茨");
		
		moviestars.addItemListener(this);
		moviestars.addActionListener(this);
					
		setLayout(new GridLayout(3,1));
		add(ta);
		add(tf);
		add(moviestars);
		
		setSize(350,300);
		setVisible(true);
	}

	public void itemStateChanged(ItemEvent e)
	{
		List l=(List)e.getSource();
		int index[]=l.getSelectedIndexes();
		String str[]=l.getSelectedItems();
		
		ta.setText("你选择了\n");
		for(int i=0;i<index.length;i++)
			ta.append("第"+index[i]+"项："+str[i]+"\n");
	}

	public void actionPerformed(ActionEvent e)
	{
		List l=(List)e.getSource();
		tf.setText("你双击了第"+l.getSelectedIndex()+"项："+l.getSelectedItem());
	}

	public static void main(String args[])
	{
		new ListTest("列表框示例");
	}
}