到底是太简单还是太难啊，怎么问了三次都没人答呢？

Question

GridBagLayout gridbag=new GridBagLayout();
-->
GridLayout gridbag=new GridLayout();

Answer 1

想知道为何使用一般的布置器GridBagLayout  GridLayout为何不行呢？

Answer 2

是因为weightx和weighty没有设置!import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ManagerAgentFrame extends Frame{
Panel leftPanel=new Panel();
Panel rightPanel=new Panel();
Color color1 =new Color(255,0,0);
Color color2 =new Color(255,250,0);
ManagerAgentFrame(){
setSize(550,400);
setResizable(false);
leftPanel.setBackground(color1);
GridBagLayout gridbag=new GridBagLayout();
GridBagConstraints gbc=new GridBagConstraints();
setLayout(gridbag);

gbc.fill=GridBagConstraints.BOTH;
gbc.weightx=1.0;
gbc.weighty=1.0;
add(leftPanel,gbc);

    rightPanel.setBackground(color2);
   
gbc.weightx=2.0;
        add(rightPanel,gbc);
}
public static void main(String[] args){
ManagerAgentFrame frame=new ManagerAgentFrame();
frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
        });               
         frame.setVisible(true);       
        }
}