JPanel

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTextField;

/**
 *
 * @author admin
 */
public class MainNo1 extends JFrame {

    private static final int FRAME_WIDTH = 500;
    private static final int FRAME_HEIGHT = 400;
    private static final int FRAME_X_ORIGIN = 150;
    private static final int FRAME_Y_ORIGIN = 250;
    private JMenu utama1;
    private JMenu utama2;
    private JMenuItem utama1a, utama1b, utama1c;
    private JButton okButton;
    private static final int BUTTON_WIDTH = 80;
    private static final int BUTTON_HEIGHT = 30;

    public MainNo1() {

        setTitle("UTS Satu");
        setSize(FRAME_WIDTH, FRAME_HEIGHT);
        setResizable(false);
        setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
        Container contentPane = getContentPane();
        contentPane.setLayout(new FlowLayout());

        createpanel1();
        createpanel2();
        //and add them to the menubar
        JLabel input = new JLabel();
        input.setText("Input Password:");
        JTextField input2 = new JTextField();
        input2.setColumns(20);
        okButton = new JButton("OK");
        okButton.setSize(BUTTON_WIDTH, BUTTON_HEIGHT);

        JMenuBar menuBar = new JMenuBar();
        setJMenuBar(menuBar);
        menuBar.add(utama1);
        menuBar.add(utama2);

        contentPane.add(input);
        contentPane.add(input2);
        contentPane.add(okButton);
        setDefaultCloseOperation(EXIT_ON_CLOSE);


    }

    public void quitAction() {

        System.exit(0);

    }

    private void createpanel1() {
        utama1 = new JMenu("Utama 1");

        utama1a = new JMenuItem("Utama1A");
        utama1.add(utama1a);
        utama1b = new JMenuItem("Utama1B");
        utama1.add(utama1b);
        utama1.addSeparator();
        utama1c = new JMenuItem("Utama1C");
        utama1.add(utama1c);

    }

    private void createpanel2() {
        utama2 = new JMenu("Utama2");
    }
}

kelas mainnya :

public class UtsNo1 {

    public static void main(String[] args) {
        MainNo1 no1 = new MainNo1();
        no1.setVisible(true);
    }
}