1. import javax.swing.*;
   
2. import java.awt.FlowLayout;
   
3. import javax.swing.JTextField;
   
4. import java.awt.event.ActionListener;
   
5. import java.awt.event.ActionEvent;
   
6. 
   
7. 
   
8. 
   
9. 
   
10. public class text extends JFrame implements ActionListener{
    
11. int a ;
    
12. JTextField jfd1=new JTextField(9);
    
13. JTextField jfd2=new JTextField(9);
    
14. JButton jbt1=new JButton("确定");
    
15. FlowLayout fly=new FlowLayout();
    
16. text(){
    
17. super("测试");
    
18. setSize(300,300);
    
19. setLocation(300,300);
    
20. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
21. this.getContentPane().add(jfd1);
    
22. this.getContentPane().add(jfd2);
    
23. this.getContentPane().add(jbt1);
    
24. this.getContentPane().setLayout(fly);
    
25. jbt1.addActionListener(this);
    
26. show();
    
27. }
    
28. public void actionPerformed(ActionEvent actionEvent) {
    
29. }
    
30. 
    
31. public void actionPerformes(ActionEvent e){
    
32. if(e.getSource()==jbt1){
    
33. String str =jfd1.getText();
    
34. 
    
35. try {
    
36. a = Integer.parseInt(str);
    
37. }
    
38. catch (Exception ex) {
    
39. ex.printStackTrace();
    
40. }
    
41. 
    
42. Double b = new Double(a);
    
43. jfd2.setText(b.toString());
    
44. 
    
45. }
    
46. 
    
47. }
    
48. 
    
49. public static void main(String[] args) {
    
50. text tex=new text();
    
51. }
    
52. 
    
53. 
    
54. }
    
55. 
    
56. 
    
57. 怎样修改，才能从jfd2中输出jfd1中的值

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1. import javax.swing.*;
   
2. import java.awt.FlowLayout;
   
3. import javax.swing.JTextField;
   
4. import java.awt.event.ActionListener;
   
5. import java.awt.event.ActionEvent;
   
6. 
   
7. 
   
8. 
   
9. 
   
10. public class text extends JFrame implements ActionListener{
    
11. int a ;
    
12. JTextField jfd1=new JTextField(9);
    
13. JTextField jfd2=new JTextField(9);
    
14. JButton jbt1=new JButton("确定");
    
15. FlowLayout fly=new FlowLayout();
    
16. text(){
    
17. super("测试");
    
18. setSize(300,300);
    
19. setLocation(300,300);
    
20. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
21. this.getContentPane().add(jfd1);
    
22. this.getContentPane().add(jfd2);
    
23. this.getContentPane().add(jbt1);
    
24. this.getContentPane().setLayout(fly);
    
25. jbt1.addActionListener(this);
    
26. show();
    
27. }
    
28. public void actionPerformed(ActionEvent actionEvent) {
    
29. }
    
30. 
    
31. public void actionPerformes(ActionEvent e){
    
32. if(e.getSource()==jbt1){
    
33. String str =jfd1.getText();
    
34. 
    
35. try {
    
36. a = Integer.parseInt(str);
    
37. }
    
38. catch (Exception ex) {
    
39. ex.printStackTrace();
    
40. }
    
41. 
    
42. Double b = new Double(a);
    
43. jfd2.setText(b.toString());
    
44. 
    
45. }
    
46. 
    
47. }
    
48. 
    
49. public static void main(String[] args) {
    
50. text tex=new text();
    
51. }
    
52. 
    
53. 
    
54. }
    
55. 
    
56. 
    
57. 怎样修改，才能从jfd2中输出jfd1中的值

复制代码