java的布局问题

[zr_dixuexiongying]

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.FlowLayout;

public class MyClass extends JFrame
{

private JPanel panel = new JPanel();


public MyClass()
{
setTitle("测试");
panel.add(new JButton("1"));
panel.add(new JButton("221"));
panel.add(new JButton("3"));
add(panel,BorderLayout.SOUTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new FlowLayout());
setResizable(false);


setSize(400,300);
setVisible(true);
}

public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
new MyClass();
}
}

上面这段程序的效果应该是按钮将沿窗体的底部从左至右排列啊!可是怎么得不到想要的结果啊?结果还是沿窗体的顶部从左至右排列.难道两个布局合在一起不起作用吗?

[free160]

import   javax.swing.JFrame; 
import   javax.swing.JButton; 
import   javax.swing.JPanel; 
import   java.awt.BorderLayout; 
import   java.awt.FlowLayout; 

public   class   MyClass   extends   JFrame 
{ 
    
      private   JPanel   panel   =   new   JPanel(); 
      

      public   MyClass() 
      { 
            setTitle("测试"); 
            panel.add(new   JButton("1")); 
            panel.add(new   JButton("221")); 
            panel.add(new   JButton("3")); 
            add(panel,BorderLayout.SOUTH); 
            setDefaultCloseOperation(EXIT_ON_CLOSE); 
            setLayout(new   FlowLayout(FlowLayout.LEFT));   //需要在这里设置一下就可以了
            setResizable(false); 
          
          
            setSize(400,300); 
            setVisible(true); 
      } 

        public   static   void   main(String[]   args) 
        { 
              JFrame.setDefaultLookAndFeelDecorated(true); 
              new   MyClass(); 
        } 
} 

[hahe7788]

按有几个群，你不妨加进去,可以和大家一起讨论啊.........46986340,28039577,4804620
在那里看看有无能回答你的,谢谢,LZ,甭忘了给俺分哦,谢谢LZ

[hahe7788]

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.FlowLayout;

public class MyClass extends JFrame
{

private JPanel panel = new JPanel();


public MyClass()
{
setTitle("测试");
panel.add(new JButton("1"));
panel.add(new JButton("221"));
panel.add(new JButton("3"));
add(panel,BorderLayout.SOUTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLayout(new FlowLayout(FlowLayout.LEFT)); //需要在这里设置一下就可以了
setResizable(false);


setSize(400,300);
setVisible(true);
}

public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
new MyClass();
}
}

[zr_dixuexiongying]

楼上的几位错了,你那样设置了也只是把FlowLayout布局的位置往左靠,并没有解决BorderLayout布局的问题啊,我现在关键是还要得到一个BorderLayout布局的设置效果.我就是要两个布局加在一起使用啊

[zr_dixuexiongying]

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import java.awt.FlowLayout;

public class MyClass extends JFrame
{

private JPanel panel = new JPanel();


public MyClass()
{
setTitle("测试");
setLayout(new BorderLayout());
panel.add(new JButton("1"));
panel.add(new JButton("221"));
panel.add(new JButton("3"));
add(panel,BorderLayout.SOUTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);

setResizable(false);


setSize(400,300);
setVisible(true);
}

public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
new MyClass();
}
}

这样就可以了,可是我想不通的是为什么FlowLayout布局不起作用

[dracularking]

一楼代码就等价于这样吧

add(panel);
setLayout(new FlowLayout());

layout被重置了