Contoh Program Penilaian Sederhana Menggunakan Java

SOURCE CODE

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class penilaian extends JFrame implements ActionListener

{

 

                JLabel lb1 = new JLabel("NIM                     :");

                JLabel lb2 = new JLabel("NAMA                 :");

                JLabel lb3 = new JLabel("Nilai UTS            :");

                JLabel lb4 = new JLabel("Nilai UAS      :");

                JLabel lb5 = new JLabel("Nilai Akhir          :");

                JLabel lb6 = new JLabel("Nilai Huruf          :");

                JLabel lb7 = new JLabel("SISTEM INFORMASI NILAI MAHASISWA");

   

                JTextField tfNIM = new JTextField();

                JTextField tfNama = new JTextField();

                JTextField tfUTS = new JTextField();

                JTextField tfUAS = new JTextField();

                JTextField tfakhir = new JTextField();

                JTextField tfhuruf = new JTextField();

   

                JButton btnHITUNG = new JButton("HITUNG");

                JButton btnINPUTLAGI = new JButton("INPUT LAGI");

                JButton btnSELESAI = new JButton("SELESAI");

                JPanel panel = new JPanel();

 

    penilaian()

    {

                setTitle("15.01.53.0044 / DHIKA BAGAS WHISNU AJI / A2");

                setDefaultCloseOperation(JFrame.EXITONCLOSE);

                setSize(520,490);

                setLocationRelativeTo(null);

                panel.setLayout(null);

       

                lb7.setBounds(30,40,500,30);

                lb7.setFont(new Font("DigifaceWide", Font.PLAIN, 20));

                add(lb7, BorderLayout.CENTER);

     

                lb1.setBounds(10,100,120,30);

                tfNIM.setBounds(120,100,290,30);

                lb2.setBounds(10,140,120,30);

                tfNama.setBounds(120,140,290,30);

                lb3.setBounds(10,180,120,30);

                tfUTS.setBounds(120,180,80,30);

                lb4.setBounds(240,180,120,30);

                tfUAS.setBounds(330,180,80,30);

                lb5.setBounds(10,220,120,30);

                tfakhir.setBounds(120,220,80,30);

                lb6.setBounds(10,260,120,30);

                tfhuruf.setBounds(120,260,80,30);

     

                btnHITUNG.setBounds(90,400,100,30);

                btnINPUTLAGI.setBounds(200,400,100,30);

                btnSELESAI.setBounds(310,400,100,30);

       

                panel.add(lb7);

                panel.add(lb1);

                panel.add(tfNIM);

                panel.add(lb2);

                panel.add(tfNama);

                panel.add(lb3);

                panel.add(tfUTS);

                panel.add(lb4);

                panel.add(tfUAS);

                panel.add(lb5);

                panel.add(tfakhir);

                panel.add(lb6);

                panel.add(tfhuruf);

       

                panel.add(btnHITUNG);

                panel.add(btnINPUTLAGI);

                panel.add(btnSELESAI);

       

                btnHITUNG.addActionListener(this);

                btnINPUTLAGI.addActionListener(this);

                btnSELESAI.addActionListener(this);

       

                add(panel);

    }

public void actionPerformed(ActionEvent e)

{

                Object objek = e.getSource();

               

    if(objek==btnHITUNG)

    {

                String d1 = tfUTS.getText();

                String d2 = tfUAS.getText();

       

                double a = Integer.parseInt(d1);

                double b = Integer.parseInt(d2);

       

                int akhir = (int) ((0.4 * a) + (0.6 * b) );

                char huruf = (char) akhir;

         

                tfakhir.setText(new String().valueOf(akhir));

       

                akhir=Integer.parseInt(tfakhir.getText());

       

            if (akhir>=80) 

            {

                                huruf='A';

            }

            else if(akhir>=65) 

            {

                                huruf='B';

            }

else if(akhir>=50)

{

                                huruf='C';

            }

            else if(akhir>=40)

            {

                                huruf='D';

            }

            else  

            {

                huruf='E';

            }

           

                tfhuruf.setText(new String().valueOf(huruf));

    }

    else if(objek==btnINPUTLAGI)

    {

                tfNIM.setText("");

                tfNama.setText("");

                tfUTS.setText("");

                tfUAS.setText("");

                tfakhir.setText("");

                tfhuruf.setText("");

                tfNIM.requestFocus();

       

                JOptionPane.showMessageDialog(null, "Silahkan Input Lagi ");

    }

    else if (objek==btnSELESAI)

    {

                JOptionPane.showMessageDialog(null,"Terima kasih telah melihat program saya ");

                System.exit(1);

    }

}

public static void main(String[]args)

                {

                penilaian frame=new penilaian();

                frame.setSize(520,490);

                frame.setVisible(true);

                }

}

TAMPILAN OUTPUT PROGRAM