GridLayout 可使容器中的各个组件呈网格状布局

 1 package TomAwt;
 2 
 3 
 4 import java.awt.*;
 5 import java.awt.event.*;
 6 public class TomAwt_15 extends Frame implements ActionListener{
 7     Button b=new Button("打开对话框");
 8     //create a model dialog object whose owner is this frame
 9     Dialog dlg=new Dialog(this,"你好",true);
10     public TomAwt_15(){
11         super("对话框示例");
12         add(b);
13         b.addActionListener(this);
14         pack();        //使框架尺寸适应组件的大小
15         setVisible(true);
16     }
17     //handle the button_click events
18     public void actionPerformed(ActionEvent e){
19         dlg.setLayout(new FlowLayout());
20         dlg.add(new Label("你好"));
21         dlg.add(new Button("确定"));
22         dlg.setSize(100,60);
23             //show the dialog
24         dlg.show();
25     }
26     public static void main(String[] args){
27         new TomAwt_15();
28     }
29 }