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Membuat Kalkulator sederhana dengan menggunakan Java NetBeans
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package kalkulator;
/**
*
* @author User
*/
public class kalkulator_sederhana extends javax.swing.JFrame {
String angka;
Double total, angka1, angka2;
int pilih;
/**
* Creates new form kalkulator_sederhana
*/
public kalkulator_sederhana() {
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.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
cmd7 = new javax.swing.JButton();
cmdtampil = new javax.swing.JTextField();
cmd8 = new javax.swing.JButton();
cmd9 = new javax.swing.JButton();
cmdplusmin = new javax.swing.JButton();
cmdclear = new javax.swing.JButton();
cmd4 = new javax.swing.JButton();
cmd5 = new javax.swing.JButton();
cmd6 = new javax.swing.JButton();
cmd1 = new javax.swing.JButton();
cmd2 = new javax.swing.JButton();
cmd3 = new javax.swing.JButton();
cmdpersen = new javax.swing.JButton();
cmd0 = new javax.swing.JButton();
cmdkoma = new javax.swing.JButton();
cmdkurang = new javax.swing.JButton();
cmdtambah = new javax.swing.JButton();
cmdbagi = new javax.swing.JButton();
cmdkali = new javax.swing.JButton();
cmdsamadengan = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
cmd7.setText("7");
cmd7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd7ActionPerformed(evt);
}
});
cmd8.setText("8");
cmd8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd8ActionPerformed(evt);
}
});
cmd9.setText("9");
cmd9.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd9ActionPerformed(evt);
}
});
cmdplusmin.setText("+/-");
cmdclear.setText("C");
cmdclear.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdclearActionPerformed(evt);
}
});
cmd4.setText("4");
cmd4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd4ActionPerformed(evt);
}
});
cmd5.setText("5");
cmd5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd5ActionPerformed(evt);
}
});
cmd6.setText("6");
cmd6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd6ActionPerformed(evt);
}
});
cmd1.setText("1");
cmd1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd1ActionPerformed(evt);
}
});
cmd2.setText("2");
cmd2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd2ActionPerformed(evt);
}
});
cmd3.setText("3");
cmd3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd3ActionPerformed(evt);
}
});
cmdpersen.setText("%");
cmdpersen.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdpersenActionPerformed(evt);
}
});
cmd0.setText("0");
cmd0.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd0ActionPerformed(evt);
}
});
cmdkoma.setText(",");
cmdkurang.setText("-");
cmdkurang.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdkurangActionPerformed(evt);
}
});
cmdtambah.setText("+");
cmdtambah.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdtambahActionPerformed(evt);
}
});
cmdbagi.setText("/");
cmdbagi.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdbagiActionPerformed(evt);
}
});
cmdkali.setText("*");
cmdkali.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdkaliActionPerformed(evt);
}
});
cmdsamadengan.setText("=");
cmdsamadengan.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmdsamadenganActionPerformed(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, false)
.addComponent(cmdtampil)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(cmd7)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(cmd8)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(cmd9, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(cmd4)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(cmd5))
.addGroup(layout.createSequentialGroup()
.addComponent(cmd1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(cmd2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(12, 12, 12)
.addComponent(cmd6))
.addGroup(layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(cmd3)))))
.addGroup(layout.createSequentialGroup()
.addComponent(cmdpersen)
.addGap(2, 2, 2)
.addComponent(cmd0, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(cmdkoma, javax.swing.GroupLayout.PREFERRED_SIZE, 39, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(40, 40, 40)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(cmdplusmin)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(cmdclear, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(cmdtambah, javax.swing.GroupLayout.DEFAULT_SIZE, 49, Short.MAX_VALUE)
.addComponent(cmdkurang, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(cmdbagi)
.addComponent(cmdkali)))
.addComponent(cmdsamadengan, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addComponent(cmdtampil, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmd7)
.addComponent(cmd8)
.addComponent(cmd9)
.addComponent(cmdplusmin)
.addComponent(cmdclear))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmd4)
.addComponent(cmd5)
.addComponent(cmd6)
.addComponent(cmdkurang)
.addComponent(cmdkali))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmd1)
.addComponent(cmd2)
.addComponent(cmd3)
.addComponent(cmdtambah)
.addComponent(cmdbagi))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(cmdpersen)
.addComponent(cmd0)
.addComponent(cmdkoma)
.addComponent(cmdsamadengan))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void cmd7ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="7";
cmdtampil.setText("7");
}
private void cmd8ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="8";
cmdtampil.setText("8");
}
private void cmd2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="2";
cmdtampil.setText("2");
}
private void cmd1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="1";
cmdtampil.setText("1");
}
private void cmd0ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="0";
cmdtampil.setText("0");
}
private void cmd3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="3";
cmdtampil.setText("3");
}
private void cmd4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="4";
cmdtampil.setText("4");
}
private void cmd5ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="5";
cmdtampil.setText("5");
}
private void cmd6ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="6";
cmdtampil.setText("6");
}
private void cmd9ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka+="9";
cmdtampil.setText("9");
}
private void cmdtambahActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
cmdtampil.setText("+");
angka="";
pilih=1;
}
private void cmdsamadenganActionPerformed(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);
cmdtampil.setText(angka);
break;
default:
break;
case 2:
angka2=Double.parseDouble(angka);
total=angka1-angka2;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
case 3:
angka2=Double.parseDouble(angka);
total=angka1*angka2;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
case 4:
angka2=Double.parseDouble(angka);
total=angka1/angka2;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
}
}
private void cmdclearActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=0.0;
angka2=0.0;
total=0.0;
angka="";
cmdtampil.setText("");
}
private void cmdkurangActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
cmdtampil.setText("-");
angka="";
pilih=2;
}
private void cmdkaliActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
cmdtampil.setText("*");
angka="";
pilih=3;
}
private void cmdbagiActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
angka1=Double.parseDouble(angka);
cmdtampil.setText("/");
angka="";
pilih=4;
}
private void cmdpersenActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
switch(pilih)
{
case 1:
angka2=Double.parseDouble(angka);
total=angka1+angka2*0.01;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
default:
break;
case 2:
angka2=Double.parseDouble(angka);
total=angka1-angka2*0.01;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
case 3:
angka2=Double.parseDouble(angka);
total=angka1*angka2*0.01;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
case 4:
angka2=Double.parseDouble(angka);
total=angka1/angka2*0.01;
angka=Double.toString(total);
cmdtampil.setText(angka);
break;
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(kalkulator_sederhana.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(kalkulator_sederhana.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(kalkulator_sederhana.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(kalkulator_sederhana.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new kalkulator_sederhana().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton cmd0;
private javax.swing.JButton cmd1;
private javax.swing.JButton cmd2;
private javax.swing.JButton cmd3;
private javax.swing.JButton cmd4;
private javax.swing.JButton cmd5;
private javax.swing.JButton cmd6;
private javax.swing.JButton cmd7;
private javax.swing.JButton cmd8;
private javax.swing.JButton cmd9;
private javax.swing.JButton cmdbagi;
private javax.swing.JButton cmdclear;
private javax.swing.JButton cmdkali;
private javax.swing.JButton cmdkoma;
private javax.swing.JButton cmdkurang;
private javax.swing.JButton cmdpersen;
private javax.swing.JButton cmdplusmin;
private javax.swing.JButton cmdsamadengan;
private javax.swing.JButton cmdtambah;
private javax.swing.JTextField cmdtampil;
// End of variables declaration
}
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