1. import java.awt.*;
   
2. import java.awt.event.*;
   
3. import javax.swing.*;
   
4. public class GridBagLayoutDemo
   
5. {
   
6. public GridBagLayoutDemo()
   
7. {
   
8.   JFrame j=new JFrame("我的GridBagLayoutDemo面板");
   
9.   GridBagLayout g=new GridBagLayout();
   
10.   j.getContentPane().setLayout(g);
    
11.   GridBagConstraints c;
    
12.   int gridx,gridy,gridwidth,gridheight,anchor,fill,ipadx,ipady;
    
13.   double weightx,weighty;
    
14.   Insets inset;
    
15.   JButton b=new JButton("你好呀！");
    
16.   gridx=0;
    
17.   gridy=0;
    
18.   gridwidth=1;
    
19.   gridheight=1;
    
20.   weightx=10;
    
21.   weighty=1;
    
22.   anchor=GridBagConstraints.CENTER;
    
23.   fill=GridBagConstraints.HORIZONTAL;
    
24.   inset=new Insets(0,0,0,0);
    
25.   ipadx=0;
    
26.   ipady=0;
    
27.   c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,fill,inset,ipadx,ipady);
    
28.   g.setConstaints(b,c);//为何这有错呢？
    
29.   j.getContentPane().add(b);
    
30.   j.pack();
    
31.   j.setVisible(true);
    
32.   j.addWindowListener(new WindowAdapter()
    
33.   {
    
34.    public void windClosing(WindowEvent e)
    
35.    {
    
36.     System.exit(0);
    
37.    }
    
38.   }
    
39.   );
    
40. }
    
41. public static void main(String[] args)
    
42. {
    
43.   new GridBagLayout();
    
44. }
    
45. }
    
46. 
    
47. <p> </p>

复制代码

设置约束，这里错在哪里？

1. import java.awt.*;
   
2. import java.awt.event.*;
   
3. import javax.swing.*;
   
4. public class GridBagLayoutDemo
   
5. {
   
6. public GridBagLayoutDemo()
   
7. {
   
8.   JFrame j=new JFrame("我的GridBagLayoutDemo面板");
   
9.   GridBagLayout g=new GridBagLayout();
   
10.   j.getContentPane().setLayout(g);
    
11.   GridBagConstraints c;
    
12.   int gridx,gridy,gridwidth,gridheight,anchor,fill,ipadx,ipady;
    
13.   double weightx,weighty;
    
14.   Insets inset;
    
15.   JButton b=new JButton("你好呀！");
    
16.   gridx=0;
    
17.   gridy=0;
    
18.   gridwidth=1;
    
19.   gridheight=1;
    
20.   weightx=10;
    
21.   weighty=1;
    
22.   anchor=GridBagConstraints.CENTER;
    
23.   fill=GridBagConstraints.HORIZONTAL;
    
24.   inset=new Insets(0,0,0,0);
    
25.   ipadx=0;
    
26.   ipady=0;
    
27.   c=new GridBagConstraints(gridx,gridy,gridwidth,gridheight,weightx,weighty,anchor,fill,inset,ipadx,ipady);
    
28.   g.setConstaints(b,c);//为何这有错呢？
    
29.   j.getContentPane().add(b);
    
30.   j.pack();
    
31.   j.setVisible(true);
    
32.   j.addWindowListener(new WindowAdapter()
    
33.   {
    
34.    public void windClosing(WindowEvent e)
    
35.    {
    
36.     System.exit(0);
    
37.    }
    
38.   }
    
39.   );
    
40. }
    
41. public static void main(String[] args)
    
42. {
    
43.   new GridBagLayout();
    
44. }
    
45. }
    
46. 
    
47. <p> </p>

复制代码

设置约束，这里错在哪里？