import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Safe extends JFrame implements ActionListener {private JLabel greetingLabel;private JTextField codeField;private JButton Button;private JTextField outcomeTextField;public static void main(String[]args){Safe demo = new Safe();demo.setSize(100,150);demo.createGUI();demo.show();}private void createGUI() {setDefaultCloseOperation(EXIT_ON_CLOSE);Container window = getContentPane();Window.setLayout(new FlowLayout());greetingLabel = new JLabel("enter code");window.add(greetingLabel);codeField = new JTextField(5);Window.add(codeField);Button = new JButton("unlock");Window.add(Button);Button.addActionListener(this);outcomeTextField = new JTextField(5);Window.add(outcomeTextField);}public void actionPerformed(ActionEvent Event) {String codeString;int code;codeString = codeField.getText();code = Integer.parseInt(codeString);if (code ==123) {outcomeTextField.setText("unlocked");}}}