mycard.java

java小程序

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyCard extends JFrame implements ActionListener
{
private CardLayout cardLayout;
private String name[]={"注意落石","车辆事故","禁止左转","最高限速"};
private JLabel card[]=new JLabel[name.length];
private JPanel cp,sp;
private JButton previous=new JButton("上一张");
private JButton next=new JButton("下一张");
public MyCard()
{
super("MyCard.java:CardLayout版面配置");
Container c=getContentPane();
cardLayout=new CardLayout();
cp=new JPanel();
cp.setLayout(cardLayout);
for(int i=0;i<name.length;i++)
{
card[i]=new JLabel(name[i]);
cp.add(name[i],card[i]);
}
sp=new JPanel();
sp.add(previous);
sp.add(next);
c.setLayout(new FlowLayout(FlowLayout.CENTER));
c.add(sp);
c.add(cp);
previous.addActionListener(this);
next.addActionListener(this);
setSize(300,150);
setVisible(true);
}

public void actionPerformed(ActionEvent e)
{
String command=e.getActionCommand();
if(command.equals("上一张"))
cardLayout.previous(cp);
else if(command.equals("下一张"))
cardLayout.next(cp);
}
public static void main(String args[])
{
MyCard app=new MyCard();
app.addWindowListener(new MyWindowListener());
}


}