关于GridBagLayout 布局管理

Question

java api 文档 我看过了GridBagLayout 的例子了，那个例子最后的button8 是在前面跨列的，我想知道怎么在后面跨列，
更改成从右到左的顺序也能实现在后面跨列，但是我不知道怎么改顺序，希望哪位高人指点一下，谢谢！

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;public class GridBagLayoutDemo {
     
    public GridBagLayoutDemo() {
        
        JFrame f = new JFrame();
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    
        JButton b1 = new JButton("Button1");
        JButton b2 = new JButton("Button2");
        JButton b3 = new JButton("Button3");
        JButton b4 = new JButton("Button4");
        JButton b5 = new JButton("Button5");
        JButton b6 = new JButton("Button6");
        JButton b7 = new JButton("Button7");
        JButton b8 = new JButton("Button8");
        JButton b9 = new JButton("Button9");
        JButton b10 = new JButton("Button10");
 
        GridBagConstraints c = new GridBagConstraints();
     GridBagLayout gridbag = new GridBagLayout();
        f.setLayout(gridbag);
        
              
        c.weightx = 1.0 ;
        c.fill = GridBagConstraints.BOTH;
        gridbag.setConstraints(b1,c); 
        gridbag.setConstraints(b2,c);
        gridbag.setConstraints(b3,c);
        
        f.add(b1);
        f.add(b2);
        f.add(b3);
        
        c.gridwidth = GridBagConstraints.REMAINDER;
        gridbag.setConstraints(b4,c);
        gridbag.setConstraints(b5,c);
        f.add(b4);
        f.add(b5);
        
        c.gridwidth = GridBagConstraints.RELATIVE;
        gridbag.setConstraints(b6,c);
        f.add(b6);
        
        c.gridwidth = GridBagConstraints.REMAINDER ;
        gridbag.setConstraints(b7,c);
        f.add(b7);
        
        c.gridwidth = GridBagConstraints.RELATIVE;
        gridbag.setConstraints(b9,c);
        f.add(b9);
        
        c = new GridBagConstraints();        
        c.fill = GridBagConstraints.BOTH;
        c.gridx = 3;                         //可以用数字来表示
        c.gridy = 3;
        c.gridheight = 2;
        gridbag.setConstraints(b8,c);
        f.add(b8);
        
        c = new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;
        c.gridx = 0;
        c.gridy = 4;
        c.gridwidth = 3;
        c.gridheight = 1;
        gridbag.setConstraints(b10,c);
        f.add(b10);
        
               
        f.pack();
        f.show();
       
        
    }    public static void main(String args[]) {
    
        new GridBagLayoutDemo();
    }
}