boxlayoutdemo1.java

来自「java 完全探索的随书源码」· Java 代码 · 共 44 行

// BoxLayoutDemo1.java

import javax.swing.*;

import java.awt.event.*;

class BoxLayoutDemo1 extends JFrame
{
   BoxLayoutDemo1 (String title)
   {
      super (title);

      addWindowListener (new WindowAdapter ()
                         {
                             public void windowClosing (WindowEvent e)
                             {
                                System.exit (0);
                             }
                         });

      JPanel jp = new JPanel ();
      jp.setLayout (new BoxLayout (jp, BoxLayout.Y_AXIS));

      JButton jb = new JButton ("Top row");
      jp.add (jb);

      JLabel jl = new JLabel ("Middle row");
      jp.add (jl);

      jb = new JButton ("Bottom row");
      jp.add (jb);

      getContentPane ().add (jp);

      setSize (300, 100);
      setVisible (true);
   }

   public static void main (String [] args)
   {
      new BoxLayoutDemo1 ("Box Layout Demo1");
   }
}