Membuat Aplikasi Number Format Converter Menggunakan Java

Ini adalah contoh sebuah program untuk menkonversi number antara Integer, Biner, Oktal, Hexa.

<br /> <br /> package chapter02;<br /> import java.awt.BorderLayout;<br /> import java.awt.event.ActionEvent;<br /> import java.awt.event.ActionListener;<br /> import javax.swing.JButton;<br /> import javax.swing.JComboBox;<br /> import javax.swing.JLabel;<br /> import javax.swing.JOptionPane;<br /> import javax.swing.JPanel;<br /> import javax.swing.JTextField;<br /> import javax.swing.WindowConstants;<br /> import javax.swing.SwingUtilities;<br /> /**<br /> * @author echo<br /> *<br /> */<br /> @SuppressWarnings(“serial”)<br /> public class NumberConverter extends javax.swing.JFrame {<br /> private JPanel jPanel1;<br /> private JTextField text_result;<br /> private JComboBox combo_result;<br /> private JComboBox combo_input;<br /> private JLabel jLabel2;<br /> private JButton button_proses;<br /> private JTextField text_input;<br /> private JLabel jLabel1;<br /> private String[] formatNumber;<br /> public static void main(String[] args) {<br /> SwingUtilities.invokeLater(new Runnable() {<br /> public void run() {<br /> NumberConverter inst = new NumberConverter();<br /> inst.setLocationRelativeTo(null);<br /> inst.setVisible(true);<br /> }<br /> });<br /> }<br /> public NumberConverter() {<br /> super();<br /> initVariable();<br /> initGUI();<br /> }<br /> private void initVariable() {<br /> formatNumber = new String[] { “Integer”, “Biner”, “Oktal”, “Hexa” };<br /> }<br /> private void initGUI() {<br /> try {<br /> setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);<br /> this.setTitle(“Number Converter”);<br /> {<br /> jPanel1 = new JPanel();<br /> getContentPane().add(jPanel1, BorderLayout.CENTER);<br /> jPanel1.setLayout(null);<br /> {<br /> jLabel1 = new JLabel();<br /> jPanel1.add(jLabel1);<br /> jLabel1.setText(“Input”);<br /> jLabel1.setBounds(12, 12, 58, 16);<br /> }<br /> {<br /> text_input = new JTextField();<br /> jPanel1.add(text_input);<br /> text_input.setBounds(70, 10, 172, 20);<br /> }<br /> {<br /> button_proses = new JButton();<br /> jPanel1.add(button_proses);<br /> button_proses.setText(“CONVERT”);<br /> button_proses.setBounds(70, 42, 89, 26);<br /> button_proses.addActionListener(new ActionListener() {<br /> @Override<br /> public void actionPerformed(ActionEvent e) {<br /> try {<br /> convertTheNumber();<br /> } catch (NumberFormatException t) {<br /> JOptionPane.showMessageDialog(<br /> NumberConverter.this, “ILLEGAL INPUT”);<br /> }<br /> }<br /> });<br /> }<br /> {<br /> jLabel2 = new JLabel();<br /> jPanel1.add(jLabel2);<br /> jLabel2.setText(“Result”);<br /> jLabel2.setBounds(12, 82, 58, 16);<br /> }<br /> {<br /> text_result = new JTextField();<br /> jPanel1.add(text_result);<br /> text_result.setBounds(70, 80, 172, 20);<br /> text_result.setEditable(false);<br /> }<br /> {<br /> combo_input = new JComboBox(formatNumber);<br /> jPanel1.add(combo_input);<br /> combo_input.setBounds(254, 7, 128, 25);<br /> }<br /> {<br /> combo_result = new JComboBox(formatNumber);<br /> jPanel1.add(combo_result);<br /> combo_result.setBounds(254, 76, 128, 25);<br /> }<br /> }<br /> pack();<br /> this.setSize(402, 144);<br /> } catch (Exception e) {<br /> e.printStackTrace();<br /> }<br /> }<br /> protected void convertTheNumber() throws NumberFormatException {<br /> String str_input = text_input.getText();<br /> if (str_input.length() < 1) { return; } int number_input; String type = combo_input.getSelectedItem().toString(); if (type.equals(formatNumber[0])) { number_input = Integer.valueOf(str_input); } else if (type.equals(formatNumber[1])) { number_input = Integer.valueOf(str_input, 2); } else if (type.equals(formatNumber[2])) { number_input = Integer.valueOf(str_input, 8); } else if (type.equals(formatNumber[3])) { number_input = Integer.valueOf(str_input, 16); } else { number_input = 0; } String result; type = combo_result.getSelectedItem().toString(); if (type.equals(formatNumber[0])) { result = String.valueOf(number_input); } else if (type.equals(formatNumber[1])) { result = Integer.toBinaryString(number_input); } else if (type.equals(formatNumber[2])) { result = Integer.toOctalString(number_input); } else if (type.equals(formatNumber[3])) { result = Integer.toHexString(number_input); } else { result = “0″; } text_result.setText(result); } }

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sumber : http://eecchhoo.wordpress.com/2007/10/29/membuat-aplikasi-number-format-converter-menggunakan-java/