实现接口出错
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Example25_1 implements WindowListener//为什么这个实现windowlistenr接口会出错呢
{
public static void main(String args[])
{
JButton button=new JButton("轻组件按钮");
JTextArea text=new JTextArea("轻组件",20,20);
JFrame jframe=new JFrame("根窗体");
jframe.setSize(200,300);
jframe.setBackground(Color.blue);
jframe.setVisible(true);
jframe.pack();
jframe.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
Container contentpane=jframe.getContentPane();
contentpane.add(button,BorderLayout.SOUTH);
contentpane.add(text,BorderLayout.CENTER);
jframe.pack();
}
}