java中ＧＵＩ编程　求大手看下错误怎么修改
下面是代码：
import javax.swing.*;
import java.awt.*;

public class exe1 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
  JFrame f=new JFrame();
  f.setTitle("FirstFream");
  f.setSize(300,300);
  JLabel LabOne=new JLabel("这是标签");
  JTextField txtOne=new JTextField("这是文本框");
  JPanel p=new JPanel();
  p.add(LabOne);
  p.add(txtOne);
  Border border=BorderFactory.createEtchedBorder();
  p.setBorder(border);
  Container contentPane=f.getContentPane();
  contentPane.add(p);
  f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  f.show();
}

}


------解决方案--------------------

Java code

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

public class Exe1 {

    /**
      * @param args
      */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        JFrame f = new JFrame("FirstFream");
        f.setSize(300,300);
        JLabel LabOne = new JLabel("这是标签");
        JTextField txtOne = new JTextField("这是文本框");
        JPanel p = new JPanel();
        p.add(LabOne);
        p.add(txtOne);
        p.setBorder(BorderFactory.createEtchedBorder());
        Container contentPane = f.getContentPane();
        contentPane.add(p);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }
}