以後還是要用Eclipse 作為GUI的Framework:)

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class LookAndFeel extends JFrame{
 
 public LookAndFeel()
 {
  super("Look And Feel");
  Container cp = getContentPane();
  cp.setLayout(new FlowLayout());
  cp.add(new JButton("JButton"));
  cp.add(new JButton("JTextField"));
  
 }
 
 
 public static void main(String[] args)
 {
  try{
   UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
  }
  catch(Exception e) {
   
  }
  
  LookAndFeel f = new LookAndFeel();
  f.setSize(200,200);
  f.setVisible(true);    
 }

}