可以直接替换
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Student extends JFrame {
public Student(){
super("登陆界面");
JPanel p1 =new JPanel();
JPanel p2 =new JPanel();
JButton j =new JButton("登陆");
JLabel l1 =new JLabel("用户名");
JLabel l2 =new JLabel("密码");
JTextField t1 =new JTextField(10);
JTextField t2 =new JTextField(10);
p1.add(l1);
p1.add(t1);
p2.add(l2);
p2.add(t2);
setLayout(new GridLayout(3,1,3,3));
add(p1);
add(p2);
add(j);
setBounds(300,200,300,200);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setVisible(true);
}
public static void main(String args[]){
new Student();
}
}