import java.awt.*;
import java.awt.event.*;
class c {
public static void main(String arg[])
{
Frame f=new Frame("GridLayout");//設置框架窗口標題
f.setLayout(new GridLayout(4,4));//設置4行4列的網格布局
f.add(new Button("7"));
f.add(new Button("8"));
f.add(new Button("9"));
f.add(new Button("/"));
f.add(new Button("4"));
f.add(new Button("5"));
f.add(new Button("6"));
f.add(new Button("*"));
f.add(new Button("1"));
f.add(new Button("2"));
f.add(new Button("3"));
f.add(new Button("-"));
f.add(new Button("0"));
f.add(new Button("."));
f.add(new Button("="));
f.add(new Button("+"));
f.setSize(200,200);//設置組件尺寸
f.setVisible(true);//顯示框架窗口
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}

}

窗口關閉事件