Simple Calculator using Java and NetBeans
This is a simple calculator which can do basic arithmetic operations. It has been built using Java and used the NetBeans platform to write code.
Requirements:-
Java
Java Swing
NetBeans IDE
Function:-
It can do addition, substraction, multiplication, division and change the sign of number. We can also enter decimal number.
Code:-
package calculations;
/**
*
* @author HP
*/
public class calculators extends javax.swing.JFrame {
double firstNumber;
double secondNumber;
double result;
String operations;
/**
* Creates new form calculators
*/
public calculators() {
initComponents();
}
/**
* 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")
//
private void initComponents() {
display = new javax.swing.JTextField();
jbtn1 = new javax.swing.JButton();
jbtn2 = new javax.swing.JButton();
jbtn3 = new javax.swing.JButton();
jbtn4 = new javax.swing.JButton();
jbtn5 = new javax.swing.JButton();
jbtn6 = new javax.swing.JButton();
jbtn7 = new javax.swing.JButton();
jbtn8 = new javax.swing.JButton();
jbtn9 = new javax.swing.JButton();
jbtn10 = new javax.swing.JButton();
jbtn11 = new javax.swing.JButton();
jbtn12 = new javax.swing.JButton();
jbtn13 = new javax.swing.JButton();
jbtn14 = new javax.swing.JButton();
jbtn15 = new javax.swing.JButton();
jbtn16 = new javax.swing.JButton();
jbtn17 = new javax.swing.JButton();
jbtn18 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
display.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
display.setHorizontalAlignment(javax.swing.JTextField.RIGHT);
jbtn1.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn1.setText("1");
jbtn1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn1ActionPerformed(evt);
}
});
jbtn2.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn2.setText("2");
jbtn2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn2ActionPerformed(evt);
}
});
jbtn3.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn3.setText("3");
jbtn3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn3ActionPerformed(evt);
}
});
jbtn4.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn4.setText("4");
jbtn4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn4ActionPerformed(evt);
}
});
jbtn5.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn5.setText("5");
jbtn5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn5ActionPerformed(evt);
}
});
jbtn6.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn6.setText("6");
jbtn6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn6ActionPerformed(evt);
}
});
jbtn7.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn7.setText("7");
jbtn7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn7ActionPerformed(evt);
}
});
jbtn8.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn8.setText("8");
jbtn8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn8ActionPerformed(evt);
}
});
jbtn9.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn9.setText("9");
jbtn9.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn9ActionPerformed(evt);
}
});
jbtn10.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn10.setText("0");
jbtn10.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn10ActionPerformed(evt);
}
});
jbtn11.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn11.setText("+");
jbtn11.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn11ActionPerformed(evt);
}
});
jbtn12.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn12.setText("-");
jbtn12.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn12ActionPerformed(evt);
}
});
jbtn13.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn13.setText("*");
jbtn13.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn13ActionPerformed(evt);
}
});
jbtn14.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn14.setText("/");
jbtn14.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn14ActionPerformed(evt);
}
});
jbtn15.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn15.setText("+/-");
jbtn15.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn15ActionPerformed(evt);
}
});
jbtn16.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn16.setText(".");
jbtn16.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn16ActionPerformed(evt);
}
});
jbtn17.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn17.setText("C");
jbtn17.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn17ActionPerformed(evt);
}
});
jbtn18.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
jbtn18.setText("=");
jbtn18.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jbtn18ActionPerformed(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()
.addGap(20, 20, 20)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(display)
.addGroup(layout.createSequentialGroup()
.addComponent(jbtn1, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn2, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn3, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn4, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addComponent(jbtn5, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn6, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn7, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn8, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addComponent(jbtn9, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn10, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn11, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn12, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(jbtn13, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn14, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jbtn17, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jbtn18, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(jbtn15, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jbtn16, javax.swing.GroupLayout.PREFERRED_SIZE, 60, javax.swing.GroupLayout.PREFERRED_SIZE)))))
.addContainerGap(20, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(17, 17, 17)
.addComponent(display, javax.swing.GroupLayout.PREFERRED_SIZE, 47, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jbtn1, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn2, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn3, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn4, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jbtn5, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn6, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn7, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn8, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jbtn9, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn10, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn11, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn12, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jbtn13, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn14, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn15, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn16, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jbtn17, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jbtn18, javax.swing.GroupLayout.PREFERRED_SIZE, 59, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(21, Short.MAX_VALUE))
);
pack();
}//
private void jbtn18ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String answer;
secondNumber = Double.parseDouble(display.getText());
if(operations == "+")
{
result = firstNumber + secondNumber ;
answer = String.format("%.0f",result);
display.setText(answer);
}
else if(operations == "-")
{
result = firstNumber - secondNumber ;
answer = String.format("%.0f",result);
display.setText(answer);
}
else if(operations == "*")
{
result = firstNumber * secondNumber ;
answer = String.format("%.0f",result);
display.setText(answer);
}
else if(operations == "/")
{
result = firstNumber / secondNumber ;
answer = String.format("%.0f",result);
display.setText(answer);
}
}
private void jbtn3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn3.getText();
display.setText(EnterNumber);
}
private void jbtn1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn1.getText();
display.setText(EnterNumber);
}
private void jbtn2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn2.getText();
display.setText(EnterNumber);
}
private void jbtn4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn4.getText();
display.setText(EnterNumber);
}
private void jbtn5ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn5.getText();
display.setText(EnterNumber);
}
private void jbtn6ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn6.getText();
display.setText(EnterNumber);
}
private void jbtn7ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn7.getText();
display.setText(EnterNumber);
}
private void jbtn8ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn8.getText();
display.setText(EnterNumber);
}
private void jbtn9ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn9.getText();
display.setText(EnterNumber);
}
private void jbtn10ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn10.getText();
display.setText(EnterNumber);
}
private void jbtn11ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
firstNumber = Double.parseDouble(display.getText());
display.setText("");
operations = "+";
}
private void jbtn12ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
firstNumber = Double.parseDouble(display.getText());
display.setText("");
operations = "-";
}
private void jbtn13ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
firstNumber = Double.parseDouble(display.getText());
display.setText("");
operations = "*";
}
private void jbtn14ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
firstNumber = Double.parseDouble(display.getText());
display.setText("");
operations = "/";
}
private void jbtn16ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String EnterNumber = display.getText() + jbtn16.getText();
display.setText(EnterNumber);
}
private void jbtn15ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
double ops = Double.parseDouble(String.valueOf(display.getText()));
ops = ops*(-1);
display.setText(String.valueOf(ops));
}
private void jbtn17ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
display.setText("");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//
/* 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(calculators.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(calculators.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(calculators.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(calculators.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new calculators().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextField display;
private javax.swing.JButton jbtn1;
private javax.swing.JButton jbtn10;
private javax.swing.JButton jbtn11;
private javax.swing.JButton jbtn12;
private javax.swing.JButton jbtn13;
private javax.swing.JButton jbtn14;
private javax.swing.JButton jbtn15;
private javax.swing.JButton jbtn16;
private javax.swing.JButton jbtn17;
private javax.swing.JButton jbtn18;
private javax.swing.JButton jbtn2;
private javax.swing.JButton jbtn3;
private javax.swing.JButton jbtn4;
private javax.swing.JButton jbtn5;
private javax.swing.JButton jbtn6;
private javax.swing.JButton jbtn7;
private javax.swing.JButton jbtn8;
private javax.swing.JButton jbtn9;
// End of variables declaration
}
Output:-
-1677584947-1583.png)
Submitted by Salvia Fatma (SalviaFatma123)
Download packets of source code on Coders Packet
Comments