Technology is mine

/*
* Calculator.java
*
* Created on June 25, 2009, 1:13 PM
*/

package GUI;
import javax.swing.JOptionPane;
/**
*
* @author mariati
*/
public class Calculator extends javax.swing.JFrame {
String angka;
Double total, angka1, angka2;
int pilih;

/** Creates new form Calculator */
public Calculator() {
initComponents();
angka="";
}

/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {

jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
b7 = new javax.swing.JButton();
b8 = new javax.swing.JButton();
b9 = new javax.swing.JButton();
b4 = new javax.swing.JButton();
b5 = new javax.swing.JButton();
b6 = new javax.swing.JButton();
b2 = new javax.swing.JButton();
b3 = new javax.swing.JButton();
btitik = new javax.swing.JButton();
b0 = new javax.swing.JButton();
bC = new javax.swing.JButton();
b1 = new javax.swing.JButton();
jPanel3 = new javax.swing.JPanel();
btmbh = new javax.swing.JButton();
bminus = new javax.swing.JButton();
bkali = new javax.swing.JButton();
bbagi = new javax.swing.JButton();
bsamadengan = new javax.swing.JButton();
bpersen = new javax.swing.JButton();
bback = new javax.swing.JButton();
bexit = new javax.swing.JButton();
txtLayar = new javax.swing.JTextField();
jTextField1 = new javax.swing.JTextField();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Aplikasi Kaluklator Netbeans");

jPanel1.setBackground(new java.awt.Color(255, 0, 255));
jPanel1.setForeground(new java.awt.Color(255, 51, 255));

jPanel2.setBackground(new java.awt.Color(153, 153, 153));

b7.setText("7");
b7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b7ActionPerformed(evt);
}
});

b8.setText("8");
b8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b8ActionPerformed(evt);
}
});

b9.setText("9");
b9.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b9ActionPerformed(evt);
}
});

b4.setText("4");
b4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b4ActionPerformed(evt);
}
});

b5.setText("5");
b5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b5ActionPerformed(evt);
}
});

b6.setText("6");
b6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b6ActionPerformed(evt);
}
});

b2.setText("2");
b2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b2ActionPerformed(evt);
}
});

b3.setText("3");
b3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b3ActionPerformed(evt);
}
});

btitik.setText(".");
btitik.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btitikActionPerformed(evt);
}
});

b0.setText("0");
b0.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b0ActionPerformed(evt);
}
});

bC.setText("CLEAR");
bC.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bCActionPerformed(evt);
}
});

b1.setText("1");
b1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
b1ActionPerformed(evt);
}
});

javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(b1, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(b4, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(b5, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(b2, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(b7, javax.swing.GroupLayout.PREFERRED_SIZE, 53, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(b8, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(b6, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(b3, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE))
.addComponent(b9, javax.swing.GroupLayout.PREFERRED_SIZE, 54, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(b0, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btitik)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(bC, javax.swing.GroupLayout.PREFERRED_SIZE, 79, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap())
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(b1)
.addComponent(b2)
.addComponent(b3)))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(45, 45, 45)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(b5)
.addComponent(b4)
.addComponent(b6))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(b7)
.addComponent(b8)
.addComponent(b9))
.addGap(18, 18, 18)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(b0)
.addComponent(bC)
.addComponent(btitik))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);

jPanel3.setBackground(new java.awt.Color(153, 153, 153));

btmbh.setText("+");
btmbh.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btmbhActionPerformed(evt);
}
});

bminus.setText("-");
bminus.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bminusActionPerformed(evt);
}
});

bkali.setText("*");
bkali.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bkaliActionPerformed(evt);
}
});

bbagi.setText("/");
bbagi.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bbagiActionPerformed(evt);
}
});

bsamadengan.setText("=");
bsamadengan.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bsamadenganActionPerformed(evt);
}
});

bpersen.setText("%");

bback.setText("DEL");
bback.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bbackActionPerformed(evt);
}
});

bexit.setText("EXIT");
bexit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
bexitActionPerformed(evt);
}
});

javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(btmbh, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(bminus, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(bkali, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(bbagi, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(bsamadengan, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(bpersen, javax.swing.GroupLayout.PREFERRED_SIZE, 52, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(bback, javax.swing.GroupLayout.PREFERRED_SIZE, 56, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(bexit, javax.swing.GroupLayout.DEFAULT_SIZE, 62, Short.MAX_VALUE)))
.addContainerGap())
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGap(21, 21, 21)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btmbh)
.addComponent(bminus))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(bkali)
.addComponent(bbagi))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(bsamadengan)
.addComponent(bpersen))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(bback)
.addComponent(bexit))
.addContainerGap(20, Short.MAX_VALUE))
);

jTextField1.setBackground(new java.awt.Color(153, 153, 153));
jTextField1.setFont(new java.awt.Font("Verdana", 1, 12)); // NOI18N
jTextField1.setForeground(new java.awt.Color(255, 255, 255));
jTextField1.setText("CALCULATOR");

javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(txtLayar, javax.swing.GroupLayout.DEFAULT_SIZE, 346, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createSequentialGroup()
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(7, 7, 7)
.addComponent(txtLayar, javax.swing.GroupLayout.PREFERRED_SIZE, 36, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jPanel3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(11, Short.MAX_VALUE))
);

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()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 364, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);

pack();
}// </editor-fold>

private void bexitActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
int a;
a = JOptionPane.showConfirmDialog(null, "Apakah Yakin Akan Keluar Dari Aplikasi Kalkulator Ini ??", "Keluar", JOptionPane.YES_NO_OPTION);
if (a == JOptionPane.YES_OPTION) {
System.exit(0);
}
}
private void bbackActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if(txtLayar.getText().length() <= 1) {
angka = "";
txtLayar.setText("0");
}else{
angka = txtLayar.getText().substring(0, txtLayar.getText().length() - 1);
txtLayar.setText(angka);
}
}

private void btitikActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += ".";
txtLayar.setText(angka);
}

private void bbagiActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
//txtLayar.setText("/");
angka="";
pilih=4;
}

private void bkaliActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
//txtLayar.setText("*");
angka="";
pilih=3;
}

private void bminusActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
//txtLayar.setText("-");
angka="";
pilih=2;

}

private void bCActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=0.0;
angka2=0.0;
total=0.0;
angka="0";
txtLayar.setText("");

}

private void bsamadenganActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
switch(pilih){
case 1:
angka2=Double.parseDouble(angka);
total=angka1+angka2;
angka=Double.toString(total);
txtLayar.setText(angka);
break;
case 2:
angka2 = Double.parseDouble(angka);
total = angka1 - angka2;
angka = Double.toString(total);
txtLayar.setText(angka);
break;
case 3:
angka2 = Double.parseDouble(angka);
total = angka1 * angka2;
angka = Double.toString(total);
txtLayar.setText(angka);
break;
case 4:
angka2 = Double.parseDouble(angka);
total = angka1 / angka2;
angka = Double.toString(total);
txtLayar.setText(angka);
default:
break;

}
}

private void btmbhActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
//txtLayar.setText("+");
angka="";
pilih=1;
}

private void b0ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "0";
txtLayar.setText(angka);
}

private void b3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "3";
txtLayar.setText(angka);
}

private void b2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "2";
txtLayar.setText(angka);
}

private void b6ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "6";
txtLayar.setText(angka);
}

private void b5ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "5";
txtLayar.setText(angka);
}

private void b4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "4";
txtLayar.setText(angka);
}

private void b9ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "9";
txtLayar.setText(angka);
}

private void b8ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "8";
txtLayar.setText(angka);
}

private void b7ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "7";
txtLayar.setText(angka);
}

private void b1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka += "1";
txtLayar.setText(angka);
}

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Calculator().setVisible(true);
}
});
}

// Variables declaration - do not modify
private javax.swing.JButton b0;
private javax.swing.JButton b1;
private javax.swing.JButton b2;
private javax.swing.JButton b3;
private javax.swing.JButton b4;
private javax.swing.JButton b5;
private javax.swing.JButton b6;
private javax.swing.JButton b7;
private javax.swing.JButton b8;
private javax.swing.JButton b9;
private javax.swing.JButton bC;
private javax.swing.JButton bback;
private javax.swing.JButton bbagi;
private javax.swing.JButton bexit;
private javax.swing.JButton bkali;
private javax.swing.JButton bminus;
private javax.swing.JButton bpersen;
private javax.swing.JButton bsamadengan;
private javax.swing.JButton btitik;
private javax.swing.JButton btmbh;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField txtLayar;
// End of variables declaration

}