Java知多少（91）对话框

 1 import java.applet.*
 2 import javax.swing.*;
 3 import java.awt.*;
 4 import java.awt.event.*;
 5 class MyWindow extends JFrame implements ActionListener{
 6     private JButton button1,button2;
 7     private static int flg=0;
 8     private static JTextField text1,text2;
 9     Mywindow(String s){
10         super(s);
11         Container con = this.getContentPane();
12         con.setLayout(new GridLayout(2,2));
13         this.setSize(200,100);
14         this setLocation(100,100);
15         button1 = new JButton("选择水果");
16         button2 = new JButton("选择食品");
17         button1.addActionListener(this);
18         button2.addActionListener(this);
19         text1 = new JTextField(20);
20         text2 = new JTextField(20);
21         con.add(button1);
22         con.add(button2);
23         con.add(text1);
24         con.add(text2);
25         this.setVisible(true);
26         this.pack();
27     }
28     public static void returnName(String s){
29         if(flg ==1)
30             text1.setText("选择的水果是："+s);
31         else if(flg == 2)
32             text2.setText("选择的食品是："+s);
33     }
34     public void actionPerformed(ActionEvent e){
35         MyDialog dialog;
36         if(e.getSource()==button1){
37             dialog = new MyDialog(this,"水果");
38             dialog.setVisible(true);
39             flg =1;
40         }
41         else if(e.getSource()==button2){
42             dialog =new MyDialog(this,"食品");
43             dialog.setVisible(true);
44             flg=2;
45         }
46     }
47 }
48 class MyDialog extends JDialog implements ActionListener{
49     JLabel title;
50     JTextField text;
51     JButton done;
52     Mydialog(JFrame F,String s){
53         super(F,s,true);//模态
54         Container con = this.getContentPane();
55         title = new JLabel("输入"+s+"名称");
56         text = new JTextField(10);
57         text.setEditable(true);
58         con.setLayout(new FlowLayout());
59         con.setSize(200,100);
60         setModal(false);
61         done = new JButton("确定");
62         done.addActionListener(this);
63         con.setVisible(true);
64         this.pack();
65     }
66     public void actionPerformed(ActionEvent e){
67         MyWindow.returnName(text.getText());
68         setVisible(false);
69         dispose();
70     }
71 }
72 public class Example6_6 extends Applet{
73     MyWindow window;
74     MyDialog dialog;
75     public void init(){
76         window = new MyWindow("带对话框窗口");
77     }
78 }

 1 public void actionPerformed(ActionEvent e){
 2     if(e.getSource()==text){
 3         MyWindow.returnName(text.getText());
 4     }
 5     else if(e.getSource()==done){
 6         MyWindow.returnName(text.getText());
 7         setVisible(false);
 8         dispose();//清除资源
 9     }
10 }