is the method to create simple login wrong

I am a newbie in Java GUI development and I am stuck in the following code.
I am open to suggestions. I am actually trying to create a simple login that gives OK if the password is matched to the number 3124, and otherwise shows the error message. Please help me.

	import java.awt.EventQueue;
	
	    import javax.swing.JFrame;
	    import javax.swing.JOptionPane;
	    import javax.swing.JButton;
	    import java.awt.event.ActionListener;
	    import java.awt.event.ActionEvent;
	    import javax.swing.JTextField;
	
	public class testing {
	
		private JFrame frame;
		private JTextField username;
		private JTextField password;
	
		/**
		 * Launch the application.
		 */
		public static void main(String[] args) {
			EventQueue.invokeLater(new Runnable() {
				public void run() {
					try {
						testing window = new testing();
						window.frame.setVisible(true);
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			});
		}
	
		/**
		 * Create the application.
		 */
		public testing() {
			initialize();
		}
	
		/**
		 * Initialize the contents of the frame.
		 */
		private void initialize() {
			frame = new JFrame();
			frame.setBounds(100, 100, 450, 300);
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			frame.getContentPane().setLayout(null);
			
			JButton btnNewButton_1 = new JButton("cancel");
			btnNewButton_1.setBounds(266, 181, 109, 56);
			frame.getContentPane().add(btnNewButton_1);
			
			username = new JTextField();
			username.setBounds(227, 11, 128, 39);
			frame.getContentPane().add(username);
			username.setColumns(10);
			
			password = new JTextField();
			password.setBounds(227, 76, 128, 39);
			frame.getContentPane().add(password);
				final int num;
				num=Integer.parseInt(password);
			password.setColumns(10);
			
			JButton btnNewButton = new JButton("login");
			btnNewButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					if(num==3124)
						{JOptionPane.showMessageDialog(null, "correct");}
					else
						{JOptionPane.showMessageDialog(null, "wrong");}
				}
			});
			btnNewButton.setBounds(62, 181, 123, 56);
			frame.getContentPane().add(btnNewButton);
		}
	}

You were checking the password even before the user has had the chance to enter anything into the text box. You need to get and check the value of num in the event listener code i.e. in actionPerformed. Also, don't convert the password to int (someone may enter some non-numeric string).

This code below works better.

	import javax.swing.JFrame;
	import javax.swing.JOptionPane;
	import javax.swing.JButton;
	import java.awt.event.ActionListener;
	import java.awt.EventQueue;
	import java.awt.event.ActionEvent;
	import javax.swing.JTextField;
	
	public class Testing {
	
		private JFrame frame;
		private JTextField username;
		private JTextField password;
	
		/**
		 * Launch the application.
		 */
		public static void main(String[] args) {
			EventQueue.invokeLater(new Runnable() {
				public void run() {
					try {
						Testing window = new Testing();
						window.frame.setVisible(true);
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			});
		}
	
		/**
		 * Create the application.
		 */
		public Testing() {
			initialize();
		}
	
		/**
		 * Initialize the contents of the frame.
		 */
		private void initialize() {
			frame = new JFrame();
			frame.setBounds(100, 100, 450, 300);
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			frame.getContentPane().setLayout(null);
	
			JButton btnNewButton_1 = new JButton("cancel");
			btnNewButton_1.setBounds(266, 181, 109, 56);
			frame.getContentPane().add(btnNewButton_1);
	
			username = new JTextField();
			username.setBounds(227, 11, 128, 39);
			frame.getContentPane().add(username);
			username.setColumns(10);
	
			password = new JTextField();
			password.setBounds(227, 76, 128, 39);
			frame.getContentPane().add(password);
			password.setColumns(10);
	
			JButton btnNewButton = new JButton("login");
			btnNewButton.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
	
					final String num;
					num = (password.getText());
	
					if (num.equalsIgnoreCase("3124")) {
						JOptionPane.showMessageDialog(null, "correct");
					} else {
						JOptionPane.showMessageDialog(null, "wrong");
					}
				}
			});
			btnNewButton.setBounds(62, 181, 123, 56);
			frame.getContentPane().add(btnNewButton);
		}
	}