Simulated student information input interface

A student information input interface is attached
`package cy;

import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

@SuppressWarnings(“serial”)
public class StudentLogin extends JFrame implements ActionListener{
JButton jb1=new JButton(“ determine ”);
JButton jb2=new JButton(“ sign out ”);
JLabel jl1= new JLabel(“ The student's name ：”);
JTextField jtf = new JTextField(20);
JLabel jl2= new JLabel(“ sex other ：”);
// JTextField jpf = new JTextField(20);
String[] listData = new String[]{“ male ”,“ Woman ”};
final JComboBox comboBox = new JComboBox(listData);

public StudentLogin(){
	JFrame jf=new JFrame(" Student information input window ");
	jf.setSize(400, 300);
	JPanel mainpanel=new JPanel();
	JLayeredPane layeredPane = new JLayeredPane();
	layeredPane.setBounds(0, 0, 600, 544);
	mainpanel.setBounds(5, 50, 400, 190);
	mainpanel.setLayout(new GridLayout(4,1));

// GridLayout layout = new GridLayout(1,2);

    //  Set up   level   and   vertical   The gap 

// layout.setHgap(10);
JPanel jp1=new JPanel();
JPanel jp2=new JPanel();
// JPanel jp3=new JPanel(layout);
JPanel jp3=new JPanel();
Font font = new Font(“ In black ”,Font.PLAIN,20);
jl1.setFont(font);
jtf.setFont(font);
jl2.setFont(font);
jp3.setFont(font);
jp1.add(jl1);
jp1.add(jtf);
jp2.add(jl2);
comboBox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
// Process only the selected status
if (e.getStateChange() == ItemEvent.SELECTED) {
// System.out.println(" Choose : " + comboBox.getSelectedIndex() + " = " + comboBox.getSelectedItem());
}
}
});

     //  Set the default selected entry 
     comboBox.setSelectedIndex(0);

     //  Add to content panel 
     jp2.add(comboBox);
	jp3.add(jb1);
	jp3.add(jb2);
	mainpanel.add(jp1);
	mainpanel.add(jp2);
	mainpanel.add(jp3);
	layeredPane.add(mainpanel);
	jf.add(layeredPane);
	jf.setLocationRelativeTo(null);
	jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	jf.setVisible(true);
	jf.setResizable(false);
	jb1.addMouseListener(new MouseAdapter(){

		@Override
		public void mouseClicked(MouseEvent e) {
			// TODO Auto-generated method stub
			message();
		}
	});
	jb2.addMouseListener(new MouseAdapter(){

		@Override
		public void mouseClicked(MouseEvent e) {
			// TODO Auto-generated method stub
			System.exit(0);
		}
	});

	
}
public void message(){
	String str= " The student's name ："+ jtf.getText()+
            ";   Gender :"+ comboBox.getSelectedItem();
	JOptionPane.showMessageDialog(this,str);
}
@SuppressWarnings("unused")
public static void main(String[] args) {
	// TODO Auto-generated method stub
	StudentLogin Student_Login=new StudentLogin();
}

@Override
public void actionPerformed(ActionEvent e) {
	// TODO Auto-generated method stub
	
}

}
`