似乎无法使用java移动我的对象

Question

我似乎无法移动我带入课堂的任何对象，当我设置界限时，其他类似乎功能正常，但不是这个。

我想知道为什么它在工作和功能上都不像我的其他课程。

有些界限是极端的，因为我确保我能注意到是否有任何物体在移动;他们不是。

package student.information.in.java;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.sql.*;

public class CreatedBy extends JFrame {

    JButton btnJoelHogg, btnAndrewCameron, btnConorElliman, btnTiarnanByrne, btnproject;
    JLabel lblJoel, lblAndrew, lblConor, lblTiarnan, lbl_title, lbl_Info;

    public CreatedBy() {

        super("Project team and information");
        setLayout(null);

        lbl_title = new JLabel("Information about the system & its creators", JLabel.CENTER);
        add(lbl_title);
        lbl_title.setBounds(200, 200, 200, 200);
        lbl_title.setFont(new Font("Calibri", Font.PLAIN, 30));
        lbl_title.setForeground(Color.BLACK);

        lblJoel = new JLabel("Joel Hogg");
        add(lblJoel);
        lblJoel.setBounds(30, 140, 200, 30);
        lblJoel.setFont(new Font("Calibri", Font.PLAIN, 14));
        lblJoel.setForeground(Color.BLACK);

        btnJoelHogg = new JButton("About Joel");
        btnJoelHogg.setFont(new Font("Calibri", Font.PLAIN, 14));
        btnJoelHogg.setBackground(Color.LIGHT_GRAY);
        btnJoelHogg.setForeground(Color.BLACK);

        lblAndrew = new JLabel("Andrew Cameron");
        add(lblAndrew);
        lblAndrew.setBounds(80, 50, 400, 30);
        lblAndrew.setFont(new Font("Calibri", Font.PLAIN, 14));
        lblAndrew.setForeground(Color.BLACK);

        btnAndrewCameron = new JButton("About Andrew");
        btnAndrewCameron.setFont(new Font("Calibri", Font.PLAIN, 14));
        btnAndrewCameron.setBackground(Color.LIGHT_GRAY);
        btnAndrewCameron.setForeground(Color.BLACK);

        lblJoel = new JLabel("Conor Elliman");
        add(lblJoel);
        lblJoel.setBounds(20, 540, 170, 380);
        lblJoel.setFont(new Font("Calibri", Font.PLAIN, 14));
        lblJoel.setForeground(Color.BLACK);

        btnConorElliman = new JButton("About Conor");
        btnConorElliman.setFont(new Font("Calibri", Font.PLAIN, 14));
        btnConorElliman.setBackground(Color.LIGHT_GRAY);
        btnConorElliman.setForeground(Color.BLACK);

        lblTiarnan = new JLabel("Tiarnán");
        add(lblTiarnan);
        lblTiarnan.setBounds(202, 506, 170, 30);
        lblTiarnan.setFont(new Font("Calibri", Font.PLAIN, 14));
        lblTiarnan.setForeground(Color.BLACK);

        btnTiarnanByrne = new JButton("About Tiarnán");
        btnTiarnanByrne.setFont(new Font("Calibri", Font.PLAIN, 14));
        btnTiarnanByrne.setBackground(Color.LIGHT_GRAY);
        btnTiarnanByrne.setForeground(Color.BLACK);

        Container c = getContentPane();

        FlowLayout fl = new FlowLayout(FlowLayout.LEFT);

        c.setLayout(fl);

        c.add(btnJoelHogg);
        c.add(btnAndrewCameron);
        c.add(btnConorElliman);
        c.add(btnTiarnanByrne);

        ButtonHandler handler = new ButtonHandler();

        btnJoelHogg.addActionListener(handler);
        btnAndrewCameron.addActionListener(handler);
        btnConorElliman.addActionListener(handler);
        btnTiarnanByrne.addActionListener(handler);
        setSize(600, 400);

        show();

    }

    public static void main(String[] args) {

        // Make frame
        CreatedBy f = new CreatedBy();

        f.addWindowListener(
                new WindowAdapter() {

                    public void windowClosing(WindowEvent e) {

                        System.out.println("Exit via windowClosing.");

                        System.exit(0);

                    }

                }
        );

    } // end of main

    // inner class for button event handling
    private class ButtonHandler implements ActionListener {

        public void actionPerformed(ActionEvent e) {

            if (e.getSource() == btnJoelHogg) {
                System.out.println(
                        "Joel Hogg button pressed");
            }

            if (e.getSource() == btnAndrewCameron) {
                System.out.println(
                        "Andrew Cameron button pressed");
            }

            if (e.getSource() == btnTiarnanByrne) {
                System.out.println("Tiarnan Byrne button pressed");
            }
            if (e.getSource() == btnConorElliman) {
                System.out.println("Conor Elliman button pressed");
            }

        }

    } // end of inner class

} // end of outer class