# Java Calculator HELP!

**960425**Oct 2, 2012 8:55 AM

I am making a calculator for my school project and i finished and it doesn't give me the result. there isent a = button you insert your number and then you push the opperation that you want to do. please help me its due on friday.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator extends JFrame {

JButton add ,subtract, multiply, divide;

JTextField num1 , num2 ;

JLabel result , enter1 , enter2 ;

public Calculator () {

setLayout (new GridBagLayout());

GridBagConstraints c = new GridBagConstraints ();

enter1 = new JLabel ("lst: ");

c.fill = GridBagConstraints.HORIZONTAL;

c.gridx = 0;

c.gridy = 0;

add(enter1,c);

num1 = new JTextField(10);

c.fill = GridBagConstraints.HORIZONTAL;

c.gridx = 1;

c.gridy = 0;

c.gridwidth = 3;

add(num1 , c ) ;

enter2 = new JLabel ("2nd: ") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 1;

c.gridwidth = 1;

add (enter2 , c ) ;

num2 = new JTextField(10);

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 1;

c.gridy = 1;

c.gridwidth = 3;

add (num2 , c ) ;

add = new JButton ("+");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 2;

c.gridwidth = 1;

add (add , c ) ;

subtract = new JButton ("-") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 1;

c.gridx = 2;

add (subtract , c ) ;

multiply = new JButton ("*") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 2;

c.gridy = 2;

add (multiply , c );

divide = new JButton ("/");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 3;

c.gridy = 2;

add (divide , c);

result = new JLabel("");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 4;

c.gridwidth = 4;

event a = new event () ;

add.addActionListener(a) ;

subtract.addActionListener(a) ;

multiply.addActionListener(a) ;

divide.addActionListener(a) ;

}

public class event implements ActionListener {

public void actionPreformed (ActionEvent a) {

double number1 , number2 ;

try {

number1 = Double.parseDouble(num1.getText()) ;

} catch (NumberFormatException e) {

result.setText("Illegal Data");

result.setForeground(Color.RED) ;

return;

}

try {

number2 = Double.parseDouble(num2.getText()) ;

}catch (NumberFormatException e) {

result.setText("illegal data");

result.setForeground(Color.RED);

return;

}

String op = a.getActionCommand();

if (op.equals("+")) {

double sum = number1 + number2 ;

result.setText(number1 + "+" + number2 + "=" + sum ) ;

result.setForeground(Color.RED) ;

} else if (op.equals("-")) {

double diff = number1 - number2 ;

result.setText (number1 + "-" + number2 + "=" + diff) ;

result.setForeground(Color.RED);

} else if (op.equals("*")) {

double factor = number1 * number2 ;

result.setText (number1 + "*" + number2 + "=" + factor) ;

result.setForeground(Color.RED);

}else if (op.equals("/")) {

if (number2 == 0) {

result.setText("Cannot Divide by 0") ;

result.setForeground(Color.RED);

} else {

double quotient = number1 / number2 ;

result.setText(number1 + "/" + number2 + "=" + quotient);

result.setForeground(Color.RED);

}

}

}

}

public static void main (String args []) {

Calculator gui = new Calculator ();

gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

gui.setVisible(true);

gui.setSize(250,175);

gui.setTitle("Event Night Product!");

}

}

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Calculator extends JFrame {

JButton add ,subtract, multiply, divide;

JTextField num1 , num2 ;

JLabel result , enter1 , enter2 ;

public Calculator () {

setLayout (new GridBagLayout());

GridBagConstraints c = new GridBagConstraints ();

enter1 = new JLabel ("lst: ");

c.fill = GridBagConstraints.HORIZONTAL;

c.gridx = 0;

c.gridy = 0;

add(enter1,c);

num1 = new JTextField(10);

c.fill = GridBagConstraints.HORIZONTAL;

c.gridx = 1;

c.gridy = 0;

c.gridwidth = 3;

add(num1 , c ) ;

enter2 = new JLabel ("2nd: ") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 1;

c.gridwidth = 1;

add (enter2 , c ) ;

num2 = new JTextField(10);

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 1;

c.gridy = 1;

c.gridwidth = 3;

add (num2 , c ) ;

add = new JButton ("+");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 2;

c.gridwidth = 1;

add (add , c ) ;

subtract = new JButton ("-") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 1;

c.gridx = 2;

add (subtract , c ) ;

multiply = new JButton ("*") ;

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 2;

c.gridy = 2;

add (multiply , c );

divide = new JButton ("/");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 3;

c.gridy = 2;

add (divide , c);

result = new JLabel("");

c.fill = GridBagConstraints.HORIZONTAL ;

c.gridx = 0;

c.gridy = 4;

c.gridwidth = 4;

event a = new event () ;

add.addActionListener(a) ;

subtract.addActionListener(a) ;

multiply.addActionListener(a) ;

divide.addActionListener(a) ;

}

public class event implements ActionListener {

public void actionPreformed (ActionEvent a) {

double number1 , number2 ;

try {

number1 = Double.parseDouble(num1.getText()) ;

} catch (NumberFormatException e) {

result.setText("Illegal Data");

result.setForeground(Color.RED) ;

return;

}

try {

number2 = Double.parseDouble(num2.getText()) ;

}catch (NumberFormatException e) {

result.setText("illegal data");

result.setForeground(Color.RED);

return;

}

String op = a.getActionCommand();

if (op.equals("+")) {

double sum = number1 + number2 ;

result.setText(number1 + "+" + number2 + "=" + sum ) ;

result.setForeground(Color.RED) ;

} else if (op.equals("-")) {

double diff = number1 - number2 ;

result.setText (number1 + "-" + number2 + "=" + diff) ;

result.setForeground(Color.RED);

} else if (op.equals("*")) {

double factor = number1 * number2 ;

result.setText (number1 + "*" + number2 + "=" + factor) ;

result.setForeground(Color.RED);

}else if (op.equals("/")) {

if (number2 == 0) {

result.setText("Cannot Divide by 0") ;

result.setForeground(Color.RED);

} else {

double quotient = number1 / number2 ;

result.setText(number1 + "/" + number2 + "=" + quotient);

result.setForeground(Color.RED);

}

}

}

}

public static void main (String args []) {

Calculator gui = new Calculator ();

gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

gui.setVisible(true);

gui.setSize(250,175);

gui.setTitle("Event Night Product!");

}

}

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