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Added a GUI app Calculator using java Swing and AWT #36

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Added a GUI app Calculator using java Swing and AWT #36

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215 changes: 215 additions & 0 deletions GUIapps/java/calculator.java
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Original file line number Diff line number Diff line change
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package GUIapps.java;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.BorderFactory;
import javax.swing.border.Border;

public class calculator implements ActionListener {
JFrame f;
JLabel title;
JTextField tf;
JButton b1, b2, b3, b4, b5, b6, b7, b8, b9, b0, sum, sub, multi, divi, per, clr, equal, deci, del;
static double a = 0, b = 0, result = 0;
static int operator = 0;

calculator() {
f = new JFrame("Calculator Application");
title = new JLabel("Calculator By Vikash");
tf = new JTextField("");
b1 = new JButton("1");
b2 = new JButton("2");
b3 = new JButton("3");
b4 = new JButton("4");
b5 = new JButton("5");
b6 = new JButton("6");
b7 = new JButton("7");
b8 = new JButton("8");
b9 = new JButton("9");
b0 = new JButton("0");
sum = new JButton("+");
sub = new JButton("-");
multi = new JButton("*");
divi = new JButton("/");
per = new JButton("%");
clr = new JButton("AC");
equal = new JButton("=");
deci = new JButton(".");
del = new JButton("Del");
title.setBounds(70, 20, 300, 40);
title.setFont(new Font("Times New Roman", Font.BOLD, 30));
title.setForeground(Color.BLUE);
tf.setBounds(50, 100, 300, 50);
tf.setFont(new Font("Arial", Font.BOLD, 20));
tf.setHorizontalAlignment(JTextField.RIGHT);
Border border = BorderFactory.createLineBorder(Color.RED, 5);
tf.setBorder(border);
b7.setBounds(50, 160, 60, 30);
b8.setBounds(130, 160, 60, 30);
b9.setBounds(210, 160, 60, 30);
divi.setBounds(290, 160, 60, 30);
b4.setBounds(50, 210, 60, 30);
b5.setBounds(130, 210, 60, 30);
b6.setBounds(210, 210, 60, 30);
multi.setBounds(290, 210, 60, 30);
b1.setBounds(50, 260, 60, 30);
b2.setBounds(130, 260, 60, 30);
b3.setBounds(210, 260, 60, 30);
sub.setBounds(290, 260, 60, 30);
b0.setBounds(50, 310, 60, 30);
deci.setBounds(130, 310, 60, 30);
sum.setBounds(210, 310, 60, 30);
clr.setBounds(290, 310, 60, 30);
per.setBounds(50, 360, 60, 30);
del.setBounds(130, 360, 60, 30);
equal.setBounds(210, 360, 140, 30);
f.add(title);
f.add(tf);
f.add(b1);
f.add(b2);
f.add(b3);
f.add(b4);
f.add(b5);
f.add(b6);
f.add(b7);
f.add(b8);
f.add(b9);
f.add(b0);
f.add(sum);
f.add(sub);
f.add(multi);
f.add(divi);
f.add(per);
f.add(clr);
f.add(equal);
f.add(deci);
f.add(del);
f.setSize(430, 450);
f.setLayout(null);
f.setVisible(true);
f.setResizable(false);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b0.addActionListener(this);
sum.addActionListener(this);
sub.addActionListener(this);
multi.addActionListener(this);
divi.addActionListener(this);
per.addActionListener(this);
clr.addActionListener(this);
equal.addActionListener(this);
deci.addActionListener(this);
del.addActionListener(this);
}

public void actionPerformed(ActionEvent e) {
if (e.getSource() == b1) {
tf.setText(tf.getText().concat("1"));
}
if (e.getSource() == b2) {
tf.setText(tf.getText().concat("2"));
}
if (e.getSource() == b3) {
tf.setText(tf.getText().concat("3"));
}
if (e.getSource() == b4) {
tf.setText(tf.getText().concat("4"));
}
if (e.getSource() == b5) {
tf.setText(tf.getText().concat("5"));
}
if (e.getSource() == b6) {
tf.setText(tf.getText().concat("6"));
}
if (e.getSource() == b7) {
tf.setText(tf.getText().concat("7"));
}
if (e.getSource() == b8) {
tf.setText(tf.getText().concat("8"));
}
if (e.getSource() == b9) {
tf.setText(tf.getText().concat("9"));
}
if (e.getSource() == b0) {
tf.setText(tf.getText().concat("0"));
}
if (e.getSource() == deci) {
tf.setText(tf.getText().concat("."));
}
if (e.getSource() == sum) {
a = Double.parseDouble(tf.getText());
operator = 1;
tf.setText(null);
}
if (e.getSource() == sub) {
a = Double.parseDouble(tf.getText());
operator = 2;
tf.setText(null);
}
if (e.getSource() == multi) {
a = Double.parseDouble(tf.getText());
operator = 3;
tf.setText(null);
}
if (e.getSource() == divi) {
a = Double.parseDouble(tf.getText());
operator = 4;
tf.setText(null);
}
if (e.getSource() == per) {
b = Double.parseDouble(tf.getText());
operator = 5;
switch (operator) {
case 5:
result = a * b / 100;
break;
}

tf.setText("" + result);
}
if (e.getSource() == equal) {
b = Double.parseDouble(tf.getText());
switch (operator) {
case 1:
result = a + b;
break;
case 2:
result = a - b;
break;
case 3:
result = a * b;
break;
case 4:
result = a / b;
break;
}

tf.setText("" + result);
}
if (e.getSource() == clr) {
tf.setText(null);
}
if (e.getSource() == del) {
String s = tf.getText();
tf.setText("");
for (int i = 0; i < s.length() - 1; i++)
tf.setText(tf.getText() + s.charAt(i));
}
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new calculator();
}
});
}
}