Menghitung Nilai Mahasiswa menggunakan GUI

 1. Listing

/**

 * @(#)datamahasiswa.java

 *

 *

 * @author

 * @version 1.00 2012/4/15

 */

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class datamahasiswa extends JFrame implements ActionListener

 {

private JTextField jTFinput1,jTFinput2,jTFinput3,jTFinput4,jTFinput5,jTFinput6,jTFinput7,jTFhasil;

private JButton btnhitungnilai, btnkeluar;

public static void main(String[] args)

{

datamahasiswa frame = new datamahasiswa();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.pack();

frame.setVisible(true);

}

public datamahasiswa()

{

                setTitle("FORM DATA KELOLAH NILAI NILAI MAHASISWA ");

                setBackground(Color.yellow);

                setForeground(Color.black);

                JPanel p1= new JPanel();

                p1.setLayout( new GridLayout(5,1));

                p1.add(new JLabel("NIM     :"));

                p1.add(jTFinput1= new JTextField(3));

                p1.add(new JLabel("Nama     :"));

                p1.add(jTFinput1= new JTextField(3));

                p1.add(new JLabel("Kelas     :"));

                p1.add(jTFinput2= new JTextField(3));

                p1.add(new JLabel("Absensi 10%     :"));

                p1.add(jTFinput3= new JTextField(3));

                p1.add(new JLabel("Nilai Tugas 20%     :"));

                p1.add(jTFinput4= new JTextField(3));

                p1.add(new JLabel("Nilai UTS 30%     :"));

                p1.add(jTFinput5= new JTextField(3));

                p1.add(new JLabel("Nilai UAS 40%     :"));

                p1.add(jTFinput6= new JTextField(3));

                p1.add(new JLabel("Hasil Nilai     :"));

                p1.add(jTFhasil= new JTextField(5));

                jTFhasil.setEditable(false);

                Dimension dim= new Dimension(900,150);

                p1.setPreferredSize(dim);

                JPanel p2= new JPanel();

                p2.setLayout(new FlowLayout());

                p2.add(btnhitungnilai = new JButton("Hitung"));

                p2.add(btnkeluar=new JButton("Selesai"));

                getContentPane().setLayout(new BorderLayout());

                getContentPane().add(p1,BorderLayout.CENTER);

                getContentPane().add(p2,BorderLayout.SOUTH);

                btnhitungnilai.addActionListener(this);

                btnkeluar.addActionListener(this);

}

public void actionPerformed(ActionEvent e){

                if (e.getSource()==btnhitungnilai){

                                int bilangan3=(Integer.parseInt(jTFinput3.getText().trim()));

                                int bilangan4=(Integer.parseInt(jTFinput4.getText().trim()));

                                int bilangan5=(Integer.parseInt(jTFinput5.getText().trim()));

                                int bilangan6=(Integer.parseInt(jTFinput6.getText().trim()));

                                int hasil=(bilangan3*10/100)+(bilangan4*20/100)+(bilangan5*30/100)+(bilangan6*40/100);

                                jTFhasil.setText(String.valueOf(hasil));

                                }

                                else if (e.getSource()==btnkeluar)

                                {System.exit(0);}

                                }

}

 2. Tampilan