Tutorial Membuat Aplikasi Konversi Berat Menggunakan Java (dilengkapi sourcecode)

Aplikasi ini sangat cocok untuk anda yang gemar membuat aplikasi berbasis java, Tutorial kali ini tentang membuat aplikasi konversi ukuran berat menggunakan java netbean. Melalui aplikasi ini kita bisa melihat konversi dari kilogram ke gram dan sebaliknya dengan cara memasukkan ukuran yang ingin dikonversi. Logika aplikasi ini hampir sama dengan aplikasi java yang sempat kami posting sebelumnya, yaitu aplikasi konversi kapasitas berbasis java.

Berikut ini adalah source code aplikasinya :

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JTextField;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.ImageIcon;
import java.awt.Font;
import java.awt.Color;
 
@SuppressWarnings("serial")
public class KonversiBeratApp extends JFrame {
 
    private JPanel contentPane;
    private JLabel lblKilogram;
    private JLabel lblGram;
    private JLabel lblOns;
    private JTextField txtKg;
    private JTextField txtGram;
    private JTextField txtOns;
    double kg, gram, ons;
    private JLabel lblIcon;
 
    /**
     * Create the frame.
     */    public KonversiBeratApp() {
        setTitle("Konversi Berat");
        setResizable(false);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBackground(new Color(245, 222, 179));
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
 
        lblKilogram = new JLabel("Kilogram");
        lblKilogram.setFont(new Font("Tahoma", Font.BOLD, 10));
        lblKilogram.setBounds(87, 80, 46, 14);
        contentPane.add(lblKilogram);
 
        lblGram = new JLabel("Gram");
        lblGram.setFont(new Font("Tahoma", Font.BOLD, 10));
        lblGram.setBounds(87, 111, 46, 14);
        contentPane.add(lblGram);
 
        lblOns = new JLabel("Ons");
        lblOns.setFont(new Font("Tahoma", Font.BOLD, 10));
        lblOns.setBounds(87, 142, 46, 14);
        contentPane.add(lblOns);
 
        txtKg = new JTextField();
        txtKg.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                gram = Double.parseDouble(txtKg.getText()) * 1000;
                ons = Double.parseDouble(txtKg.getText()) / 10;
                txtGram.setText("" + gram);
                txtOns.setText("" + ons);
 
            }
        });
        txtKg.setBounds(143, 77, 117, 20);
        contentPane.add(txtKg);
        txtKg.setColumns(10);
 
        txtGram = new JTextField();
        txtGram.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                kg = Double.parseDouble(txtGram.getText()) / 1000;
                ons = Double.parseDouble(txtGram.getText()) / 100;
                txtKg.setText("" + kg);
                txtOns.setText("" + ons);
            }
        });
        txtGram.setBounds(143, 108, 117, 20);
        contentPane.add(txtGram);
        txtGram.setColumns(10);
 
        txtOns = new JTextField();
        txtOns.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                kg = Double.parseDouble(txtOns.getText()) / 10;
                gram = Double.parseDouble(txtOns.getText()) * 100;
                txtKg.setText("" + kg);
                txtGram.setText("" + gram);
            }
        });
        txtOns.setBounds(143, 139, 117, 20);
        contentPane.add(txtOns);
        txtOns.setColumns(10);
 
        lblIcon = new JLabel("");
        lblIcon.setIcon(new ImageIcon(KonversiBeratApp.class
                .getResource("/KonversiBerat/truck.png")));
        lblIcon.setBounds(72, 47, 333, 201);
        contentPane.add(lblIcon);
        setLocationRelativeTo(null);
    }
 
    /**
     * Launch the application.
     */    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    KonversiBeratApp frame = new KonversiBeratApp();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
}