import javax.swing.*;import java.awt.*;import java.awt.event.*;public class FrameDemo1{ public static void main(String args[]) {  JFrame frame=new JFrame("My frame");  Container c=frame.getContentPane();  c.setLayout(new FlowLayout());  JLabel lb=new JLabel("FrameDemo");  JTextField tf=new JTextField("我是菜鸟 但我要飞!!!");  JButton bt1=new JButton("Botton1");  JButton bt2=new JButton("Botton2");  JButton jButton1=new JButton("Botton11");  jButton1.setBackground(Color.pink);  jButton1.setBorder(BorderFactory.createRaisedBevelBorder());  jButton1.setToolTipText("click me");  jButton1.setText("I have been changde ");  c.add(lb);  c.add(tf);  c.add(bt1);  c.add(bt2);  frame.setSize(400,100);   frame.show();  frame.addWindowListener(new WindowAdapter()  {   public void windowClosing(WindowEvent e)   {    System.exit(0);   }  }); }}

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