JAVA GUI 做一个学生信息窗口

package gui;
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.Icon;
import javax.swing.ImageIcon;
public class LabelFrame extends JFrame {
    private final JLabel label1;
    private final JLabel label2;
    private final JLabel label3;
    private final JLabel label4;
    public LabelFrame()
    {
        super("Student information");
        setLayout(new FlowLayout());
        label1 = new JLabel("Student name: Amy");
        label1.setToolTipText("studentA");
        add(label1);

        Icon photo = new ImageIcon(getClass().getResource( "photo.gif"));
        label2 = new JLabel("student photo:", photo,SwingConstants.RIGHT);
        label2.setHorizontalTextPosition(SwingConstants.LEFT);
        //Icon photo = new ImageIcon(getClass().getResource( "photo.gif"));
        add(label2);

        label3 = new JLabel("Student number: 123456");
        label3.setToolTipText("123456");
        add(label3);

        label4 = new JLabel("Student major: CS");
        add(label4);
    }
    public static void main(String[] args)
    {
        LabelFrame labelFrame = new LabelFrame();
        labelFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        labelFrame.setSize(260,180);
        labelFrame.setVisible(true);
    }
}