swing中几种layout示例

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;


import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;


public class test extends JFrame {
  public test() {
    super("Common Layout Managers");
    setSize(500, 380);


    JPanel desktop = new JPanel();
    getContentPane().add(desktop);


    JPanel fr1 = new JPanel();
    fr1.setBorder(new TitledBorder("FlowLayout"));
    fr1.setLayout(new FlowLayout());
    fr1.add(new JButton("1"));
    fr1.add(new JButton("2"));
    fr1.add(new JButton("3"));
    fr1.add(new JButton("4"));
    desktop.add(fr1, 0);


    JPanel fr2 = new JPanel();
    fr2.setBorder(new TitledBorder("GridLayout"));
    fr2.setLayout(new GridLayout(2, 2));
    fr2.add(new JButton("1"));
    fr2.add(new JButton("2"));
    fr2.add(new JButton("3"));
    fr2.add(new JButton("4"));
    desktop.add(fr2, 0);


    JPanel fr3 = new JPanel();
    fr3.setBorder(new TitledBorder("BorderLayout"));
    fr3.setLayout(new BorderLayout(1, 5));
    fr3.add(new JButton("1"), BorderLayout.NORTH);
    fr3.add(new JButton("2"), BorderLayout.EAST);
    fr3.add(new JButton("3"), BorderLayout.SOUTH);
    fr3.add(new JButton("4"), BorderLayout.WEST);
    fr3.add(new JButton("5"),BorderLayout.CENTER);
    desktop.add(fr3, 0);


    JPanel fr4 = new JPanel();
    fr4.setBorder(new TitledBorder("BoxLayout - X"));
    fr4.setLayout(new BoxLayout(fr4, BoxLayout.X_AXIS));
    fr4.add(new JButton("1"));
    fr4.add(Box.createHorizontalStrut(12));
    fr4.add(new JButton("2"));
    fr4.add(Box.createGlue());
    fr4.add(new JButton("3"));
    fr4.add(Box.createHorizontalGlue());
    fr4.add(new JButton("4"));
    desktop.add(fr4, 0);


    JPanel fr5 = new JPanel();
    fr5.setBorder(new TitledBorder("BoxLayout - Y"));
    fr5.setLayout(new BoxLayout(fr5, BoxLayout.Y_AXIS));
    fr5.add(new JButton("1"));
    fr5.add(Box.createVerticalStrut(10));
    fr5.add(new JButton("2"));
    fr5.add(Box.createGlue());
    fr5.add(new JButton("3"));
    fr5.add(Box.createVerticalGlue());
    fr5.add(new JButton("4"));
    desktop.add(fr5, 0);


    WindowListener wndCloser = new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    };
    addWindowListener(wndCloser);
    setVisible(true);
  }


  public static void main(String argv[]) {
    new test();
  }

}