//**************************************
// Name: Calculator
// Description:My first calculator
// By: AhmedNassar
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=7015&lngWId=2//for details.//**************************************
package Swings;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class Calculator extends JFrame{
static double number_1; // First input
static double number_2; // Second input
static String operator; // Operator value
static boolean checkOperator; // Check: if one of the operators clicked, the screen will be cleaned
static double input;// Input from the screen
static String result;// Result of the math operation
static JTextArea text_screen = new JTextArea("0",2,15);
JButton btn_1 = new JButton(" 1 ");
JButton btn_2 = new JButton(" 2 ");
JButton btn_3 = new JButton(" 3 ");
JButton btn_4 = new JButton(" 4 ");
JButton btn_5 = new JButton(" 5 ");
JButton btn_6 = new JButton(" 6 ");
JButton btn_7 = new JButton(" 7 ");
JButton btn_8 = new JButton(" 8 ");
JButton btn_9 = new JButton(" 9 ");
JButton btn_0 = new JButton(" 0 ");
JButton btn_square = new JButton("x^2");
JButton btn_inverse = new JButton("1/x");
JButton btn_sqrt = new JButton("sqrt");
JButton btn_plus_minus = new JButton("+/-");
JButton btn_float = new JButton(" . ");
JButton btn_plus = new JButton(" + ");
JButton btn_minus = new JButton(" - ");
JButton btn_multi = new JButton(" × ");
JButton btn_divide = new JButton(" / ");
JButton btn_equal = new JButton(" = ");
JButton btn_mod = new JButton(" % ");
JButton btn_backspace = new JButton(" Backspace ");
JButton btn_clean = new JButton("C");
JButton btn_pow = new JButton("x^n");
JButton btn_pi = new JButton("pi");
JButton btn_exp= new JButton("e");
JButton btn_log= new JButton("log");
JButton btn_sin= new JButton("sin");
JButton btn_cos= new JButton("cos");
JButton btn_tan= new JButton("tan");
JPanel panel_1 = new JPanel(new GridLayout());
JPanel panel_2 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_3 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_5 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_6 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_7 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_8 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_9 = new JPanel(new GridLayout(1,1,5,5));
JPanel panel_10 = new JPanel(new GridLayout(1,1,5,5));
public static void main(String[] args) {
Calculator cal = new Calculator();
cal.setCalculator();
cal.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
private void setCalculator(){
text_screen.setLineWrap(true);
text_screen.setEditable(false);
text_screen.setFont(new Font("Algerian",Font.PLAIN,20));
setSize(300, 430);
setVisible(true);
setResizable(false);
setTitle("Calculator");
setLocation(350, 250);
setLayout(new GridLayout(9,4,5,5));
addComponent();
}
private void addComponent() {
panel_1.add(text_screen);
panel_2.add(btn_backspace);
panel_2.add(btn_clean);
panel_3.add(btn_sin);
panel_3.add(btn_cos);
panel_3.add(btn_tan);
panel_5.add(btn_pow);
panel_5.add(btn_log);
panel_5.add(btn_exp);
panel_5.add(btn_pi);
panel_6.add(btn_square);
panel_6.add(btn_inverse);
panel_6.add(btn_sqrt);
panel_6.add(btn_plus_minus);
panel_7.add(btn_plus);
panel_7.add(btn_minus);
panel_7.add(btn_multi);
panel_7.add(btn_divide);
panel_7.add(btn_mod);
panel_8.add(btn_9);
panel_8.add(btn_8);
panel_8.add(btn_7);
panel_8.add(btn_6);
panel_9.add(btn_5);
panel_9.add(btn_4);
panel_9.add(btn_3);
panel_9.add(btn_2);
panel_10.add(btn_1);
panel_10.add(btn_0);
panel_10.add(btn_float);
panel_10.add(btn_equal);
add(panel_1);
add(panel_2);
add(panel_3);
add(panel_5);
add(panel_6);
add(panel_7);
add(panel_8);
add(panel_9);
add(panel_10);
btn_0.addActionListener(new MyLisetner());
btn_1.addActionListener(new MyLisetner());
btn_2.addActionListener(new MyLisetner());
btn_3.addActionListener(new MyLisetner());
btn_4.addActionListener(new MyLisetner());
btn_5.addActionListener(new MyLisetner());
btn_6.addActionListener(new MyLisetner());
btn_7.addActionListener(new MyLisetner());
btn_8.addActionListener(new MyLisetner());
btn_9.addActionListener(new MyLisetner());
btn_float.addActionListener(new MyLisetner());
btn_plus.addActionListener(new MyLisetner());
btn_minus.addActionListener(new MyLisetner());
btn_multi.addActionListener(new MyLisetner());
btn_divide.addActionListener(new MyLisetner());
btn_mod.addActionListener(new MyLisetner());
btn_plus_minus.addActionListener(new MyLisetner());
btn_equal.addActionListener(new MyLisetner());
btn_clean.addActionListener(new MyLisetner());
btn_backspace.addActionListener(new MyLisetner());
btn_square.addActionListener(new MyLisetner());
btn_sqrt.addActionListener(new MyLisetner());
btn_inverse.addActionListener(new MyLisetner());
btn_pi.addActionListener(new MyLisetner());
btn_exp.addActionListener(new MyLisetner());
btn_log.addActionListener(new MyLisetner());
btn_pow.addActionListener(new MyLisetner());
btn_sin.addActionListener(new MyLisetner());
btn_cos.addActionListener(new MyLisetner());
btn_tan.addActionListener(new MyLisetner());
}
public static void addDigit(int digit) {// Add digit to screen
if (checkOperator) {// Check: if one of the operators clicked, the screen will be cleaned
text_screen.setText("0");
checkOperator = false;
}
if (Double.parseDouble(text_screen.getText()) == 0) { //(To prevent the appearance of the useless left 0)
text_screen.setText("");
text_screen.setText(text_screen.getText() + digit); // Add digit
}else {
text_screen.setText(text_screen.getText() + digit); // Add digit
}
input = Double.parseDouble(text_screen.getText()); // save the last screen input as double
}
public void addOperator(String mathOp) {// Choose the operators
operator = mathOp;
checkOperator = true;
}
public void changeScreen(double input) {// Add the new result to screen
text_screen.setText(Double.toString(input));
}
public class MyLisetner implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
operationButtons(e);
numberButtons(e);
equal(e);
}
public void numberButtons(ActionEvent e) {
JButton button = (JButton) e.getSource() ;
if (button == btn_0) {
addDigit(0);
}else if (button == btn_1) {
addDigit(1);
}else if (button == btn_2) {
addDigit(2);
}else if (button == btn_3) {
addDigit(3);
}else if (button == btn_4) {
addDigit(4);
}else if (button == btn_5) {
addDigit(5);
}else if (button == btn_6) {
addDigit(6);
}else if (button == btn_7) {
addDigit(7);
}else if (button == btn_8) {
addDigit(8);
}else if (button == btn_9) {
addDigit(9);
}else if (button == btn_float) {
if (!text_screen.getText().contains("."))
text_screen.append(".");
}else if (button == btn_plus_minus) {
input *= -1;
changeScreen(input);
}else if (button == btn_square) {
input *= input;
changeScreen(input);
}else if (button == btn_inverse) {
input = 1/input;
changeScreen(input);
}else if (button == btn_sqrt) {
input = Math.sqrt(input);
changeScreen(input);
}else if (button == btn_pi) {
input = Math.PI;
changeScreen(input);
}else if (button == btn_exp) {
input = Math.exp(number_1);
changeScreen(input);
}else if (button == btn_log) {
input = Math.log10(number_1);
changeScreen(input);
}else if (button == btn_sin) {
input = Math.sin(number_1/ 180*Math.PI);
changeScreen(input);
}else if (button == btn_cos) {
input = Math.cos(number_1/ 180 *Math.PI);
changeScreen(input);
}else if (button == btn_tan) {
input = Math.tan(number_1/ 180*Math.PI);
changeScreen(input);
}
if (operator != null) {
number_2 = input;
}
if (operator == null) {
number_1 = input;
}
if (button == btn_clean) {
text_screen.setText("0");
number_1 = 0;
number_2 = 0;
operator = null;
}
if (button == btn_backspace) {
text_screen.setText(text_screen.getText().substring (0,text_screen.getText().length () - 1));
if (text_screen.getText ().length ()<=0 ) {
text_screen.setText("0");
}
}
}
public void operationButtons(ActionEvent e){
JButton button = (JButton) e.getSource() ;
if (button == btn_plus) {
addOperator("+");
}else if (button == btn_minus) {
addOperator("-");
}else if (button == btn_multi) {
addOperator("*");
}else if (button == btn_divide) {
addOperator("/");
}else if (button == btn_mod) {
addOperator("%");
}else if (button == btn_pow) {
addOperator("pow");
}
}
public void equal(ActionEvent e) {
JButton button = (JButton) e.getSource() ;
if (button ==btn_equal) {
if (operator == "+") {
result = Double.toString(number_1 + number_2);
text_screen.setText(result);
number_1 = Double.parseDouble(result);
}else if (operator == "-") {
result = Double.toString(number_1 - number_2);
text_screen.setText(result);
number_1 = Double.parseDouble(result);
}else if (operator == "*") {
result = Double.toString(number_1 * number_2);
text_screen.setText(result);
number_1 = Double.parseDouble(result);
}else if (operator == "/") {
if (number_2 == 0) {
JOptionPane.showMessageDialog(null, "Can't divide by zero..");
text_screen.setText("0");
numberButtons(e);
}else if (number_2 !=0 ) {
result = Double.toString(number_1 / number_2);
text_screen.setText(result);
number_1 = Double.parseDouble(result);
}
}else if (operator == "%") {
result = Double.toString(number_1 + number_2);
text_screen.setText(result);
number_1 = Double.parseDouble(result);
}else if (operator == "pow") {
input = Math.pow(number_1, number_2);
changeScreen(input);
number_1 = input;
}
input = Double.parseDouble(text_screen.getText());
}
}
}
}
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