JavaSwing图形界面编程之ListSelectionListener

package three.day.frame;

import java.awt.Color;

import java.awt.Container;

import java.awt.GridLayout;

import java.awt.HeadlessException;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JList;

import javax.swing.JScrollPane;

import javax.swing.event.ListSelectionEvent;

import javax.swing.event.ListSelectionListener;

public class ListSelectionEventDemo extends JFrame implements ListSelectionListener{

private JLabel lbTip;

private JList list;

private JScrollPane scrollPane;

String[] strScale = {"幼儿园","小学","初中","高中","研究生","硕士","博士"};

/**

* @param args

*/

public static void main(String[] args) {

new ListSelectionEventDemo("ListSelectionEvent Demo");

}

/**

* @param arg0

* @throws HeadlessException

*/

public ListSelectionEventDemo(String title) throws HeadlessException {

super(title);

Container panel = getContentPane();

panel.setLayout(new GridLayout(2,1));

lbTip = new JLabel("你选择的是：");

list = new JList(strScale);

list.setBorder(BorderFactory.createTitledBorder("请选择"));

list.setOpaque(true);

list.setBackground(new Color(180,255,0));

list.setVisibleRowCount(3);

list.addListSelectionListener(this);

scrollPane = new JScrollPane(list);

panel.add(lbTip);

panel.add(scrollPane);

setLocation(300,200);

pack();

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

setVisible(true);

}

@Override

public void valueChanged(ListSelectionEvent e) {

// TODO Auto-generated method stub

int[] selectedIndex = list.getSelectedIndices();

String str="你选择的是：";

for(int i=0;i<selectedIndex.length;i++)

{

str = str+" "+strScale[selectedIndex[i]];

}

lbTip.setText(str);

}

}