Program ini menggunakan netbeans 6.8. Pembuatan form dari JFrame Form, lalu design form seperti program dibawah. Lalu Kode program ditambahkan seperti dibawah ini.
/*
* JFrame.java
*
* Created on 07 Mar 12, 6:45:28
*/
package javagui;
/**
*
* @author diodavid.co.cc
*/
public class JFrame extends javax.swing.JFrame {
/** Creates new form JFrame */
public JFrame() {
initComponents();
}
private double a;
private double b;
@SuppressWarnings("unchecked")
//
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
tf1 = new javax.swing.JTextField();
tf2 = new javax.swing.JTextField();
tf3 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("HARGA AWAL");
jLabel2.setText("DISKON");
jLabel3.setText("HARGA AKHIR");
tf1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
tf1ActionPerformed(evt);
}
});
tf2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
tf2ActionPerformed(evt);
}
});
tf3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
tf3ActionPerformed(evt);
}
});
jButton1.setText("PROCESS");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jButton2.setText("EXIT");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
});
jButton3.setText("CLEAR");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 49, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 76, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(tf2, javax.swing.GroupLayout.DEFAULT_SIZE, 264, Short.MAX_VALUE)
.addComponent(tf3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(tf1, javax.swing.GroupLayout.PREFERRED_SIZE, 264, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(layout.createSequentialGroup()
.addComponent(jButton1)
.addGap(18, 18, 18)
.addComponent(jButton3)
.addGap(18, 18, 18)
.addComponent(jButton2)))
.addGap(23, 23, 23))
);
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jButton1, jButton2, jButton3});
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {tf1, tf2, tf3});
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {jLabel1, jLabel2, jLabel3});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(24, 24, 24)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(tf2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(22, 22, 22)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 26, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(tf3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addComponent(tf1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(45, 45, 45)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton2)
.addComponent(jButton3)
.addComponent(jButton1))
.addContainerGap())
);
layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {tf1, tf3});
layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jLabel1, jLabel2, jLabel3});
layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {jButton1, jButton2, jButton3});
jLabel1.getAccessibleContext().setAccessibleName("jlabel1");
pack();
}//
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
System.exit(0);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
a = Integer.parseInt(tf1.getText());
b = Integer.parseInt(tf2.getText());
double diskon = b*0.01;
double hdiskon = a * diskon;
double hbayar = a - hdiskon;
tf3.setText(""+hbayar);
}
private void tf1ActionPerformed(java.awt.event.ActionEvent evt) {
tf1.requestFocusInWindow();
tf1.transferFocus();
}
private void tf2ActionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
tf2.transferFocus();
}
private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
tf1.setText("");
tf2.setText("");
tf3.setText("");
tf1.requestFocusInWindow();
jButton3ActionPerformed(evt);
}
private void tf3ActionPerformed(java.awt.event.ActionEvent evt) {
jButton3.transferFocus();
jButton3ActionPerformed(evt);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new JFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JTextField tf1;
private javax.swing.JTextField tf2;
private javax.swing.JTextField tf3;
// End of variables declaration
}
Dalam coding diatas proses perhitungan ada di
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
a = Integer.parseInt(tf1.getText());
b = Integer.parseInt(tf2.getText());
double diskon = b*0.01;
double hdiskon = a * diskon;
double hbayar = a - hdiskon;
tf3.setText(""+hbayar);
Integer.parseInt, digunakan untuk merubah input field yang defaultnya string, menjadi integer agar bisa dioperasikan.
