Aplikasi Konversi Berat Sederhana

KonversiBeratApp.java

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();
}
}
});
}
}