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POJMenu Item Action Listener is not being detected
 

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    <p>I am making a library database for a school project and am having a little trouble with my menu. So the main problem is that in the Action Listener method when I write </p> <pre><code>(e.getSource()==m1Frame1) </code></pre> <p>my program does not detect the menu item and gives me an error. I have looked at multiple tutorials etc. online but cannot seem to find any way to fix it and make it so that if a specific item is clicked a specific action occurs. Any help/resolution regarding this issue would be much appreciated.</p> <pre><code>import javax.swing.*; import java.awt.Graphics; import java.awt.Toolkit; import java.awt.event.*; import javax.swing.JFrame; import java.awt.event.ActionEvent; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.JTextField; import javax.swing.JPasswordField; import javax.swing.JOptionPane; import java.awt.event.*; import javax.swing.Icon; import java.awt.*; import javax.swing.JLabel; import javax.swing.ImageIcon; import javax.swing.JPanel; import java.awt.Color; public class m1 extends JFrame { JPanel pane = new JPanel(); JFrame a = new JFrame("Main Frame"); JFrame b = new JFrame("Sub Frame"); JButton checkOutButton = new JButton("check"); JButton returnButton = new JButton("return"); JMenu mb2 = new JMenu("Books"); // mb2.setForeground(Color.white); JMenu open = new JMenu("Students"); // open.setForeground(Color.white); public m1() { JMenuBar mb; mb = new JMenuBar() { public void paintComponent(Graphics g) { g.drawImage(Toolkit.getDefaultToolkit().getImage("G:"), 0, 0, this); } }; setSize(400, 400); setBackground(Color.BLACK); setTitle("Screen 2"); setLocationRelativeTo(null); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); mb.add(open); JMenuItem m1Frame1 = new JMenuItem("Create"); JMenuItem m1Frame2 = new JMenuItem("Delete"); JMenu m1Frame3 = new JMenu("Look-Up"); JMenuItem m1Frame4 = new JMenuItem("Check Fine"); JMenuItem m1Frame5 = new JMenuItem("Check Borrowed Books"); JMenuItem subM1 = new JMenuItem("Name"); JMenuItem subM2 = new JMenuItem("Student #"); open.add(m1Frame1); open.add(m1Frame2); open.add(m1Frame3); open.add(m1Frame4); open.add(m1Frame5); m1Frame3.add(subM1); m1Frame3.add(subM2); mb.add(mb2); JMenuItem m2Frame1 = new JMenuItem("Create"); JMenuItem m2Frame2 = new JMenuItem("Delete"); JMenu m2Frame3 = new JMenu("Look-Up"); JMenuItem subB1 = new JMenuItem("Title"); JMenuItem subB2 = new JMenuItem("Author"); JMenuItem subB3 = new JMenuItem("Category"); JMenuItem subB4 = new JMenuItem("ISBN"); JMenuItem m2Frame4 = new JMenuItem("Compare Star Rating"); JMenuItem m2Frame5 = new JMenuItem("Check If Checked Out"); JMenuItem m2Frame6 = new JMenuItem("Lost Book"); mb2.add(m2Frame1); mb2.add(m2Frame2); mb2.add(m2Frame3); mb2.add(m2Frame4); mb2.add(m2Frame5); mb2.add(m2Frame6); m2Frame3.add(subB1); m2Frame3.add(subB2); m2Frame3.add(subB3); m2Frame3.add(subB4); a.setJMenuBar(mb); a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); a.setSize(1280, 720); a.setVisible(true); b.setSize(600, 400); m handler = new m(); pane.add(checkOutButton); pane.add(returnButton); add(pane); checkOutButton.setVisible(false); returnButton.setVisible(false); checkOutButton.setBounds(60, 440, 220, 30); returnButton.setBounds(60, 404, 100, 50); checkOutButton.addActionListener(handler); returnButton.addActionListener(handler); } public class m implements ActionListener, ItemListener { public void actionPerformed(ActionEvent e) { (e.getSource() == m1Frame1) { a.setVisible(false); setVisible(true); checkOutButton.setVisible(true); returnButton.setVisible(true); } } public void itemStateChanged(ItemEvent e) { } } public static void main(String[] args) { m1 aa = new m1(); } } </code></pre>
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