Calculator GUI

import java.awt.EventQueue;



import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.JButton;

import javax.swing.JLabel;

import java.awt.Font;

import java.awt.Color;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;



public class Calculator {



    private JFrame frmCalculator;

    private JTextField number2field;

    private JTextField number1field;



    /**

     * Launch the application.

     */

    public static void main(String[] args) {

        EventQueue.invokeLater(new Runnable() {

            public void run() {

                try {

                    Calculator window = new Calculator();

                    window.frmCalculator.setVisible(true);

                } catch (Exception e) {

                    e.printStackTrace();

                }

            }

        });

    }



    /**

     * Create the application.

     */

    public Calculator() {

        initialize();

    }



    /**

     * Initialize the contents of the frame.

     */

    private void initialize() {

        frmCalculator = new JFrame();

        frmCalculator.setTitle("Calculator");

        frmCalculator.getContentPane().setBackground(Color.LIGHT_GRAY);

        frmCalculator.setBounds(100, 100, 450, 300);

        frmCalculator.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frmCalculator.getContentPane().setLayout(null);



        number2field = new JTextField();

        number2field.setBounds(140, 114, 86, 23);

        frmCalculator.getContentPane().add(number2field);

        number2field.setColumns(10);



        JLabel resultlabel = new JLabel("Result:");

        resultlabel.setFont(new Font("Tahoma", Font.PLAIN, 16));

        resultlabel.setBounds(24, 213, 151, 31);

        frmCalculator.getContentPane().add(resultlabel);



        JButton btnNewButton = new JButton("/");

        btnNewButton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                try {

                    double num1 =Double.parseDouble(number1field.getText());

                    double num2 =Double.parseDouble(number2field.getText());

                    double res = num1/num2;

                    resultlabel.setText(String.format("Result: %.3f", res));

                }catch (NumberFormatException e2) {

                    resultlabel.setText("Invalid input");

                }

            }

        });

        btnNewButton.setBounds(268, 179, 49, 23);

        frmCalculator.getContentPane().add(btnNewButton);



        JLabel lblNewLabel = new JLabel("Number1:");

        lblNewLabel.setFont(new Font("Tahoma", Font.PLAIN, 20));

        lblNewLabel.setBounds(24, 46, 111, 36);

        frmCalculator.getContentPane().add(lblNewLabel);



        JLabel lblNewLabel_1 = new JLabel("Number2:");

        lblNewLabel_1.setFont(new Font("Tahoma", Font.PLAIN, 20));

        lblNewLabel_1.setBounds(24, 114, 93, 23);

        frmCalculator.getContentPane().add(lblNewLabel_1);





        JButton sumbutton = new JButton("+");

        sumbutton.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent arg0) {

                try {

                    double num1 =Double.parseDouble(number1field.getText());

                    double num2 =Double.parseDouble(number2field.getText());

                    double res = num1 + num2;

                    resultlabel.setText(String.format("Result: %.3f", res));

                } catch (NumberFormatException e1) {

                    resultlabel.setText("Invalid input");

                }

            }

        });

        sumbutton.setBounds(86, 179, 49, 23);

        frmCalculator.getContentPane().add(sumbutton);



        JButton btnX = new JButton("-");

        btnX.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                try {

                double num1 =Double.parseDouble(number1field.getText());

                double num2 =Double.parseDouble(number2field.getText());

                double res = num1-num2;

                resultlabel.setText(String.format("Result: %.3f", res));

            }catch (NumberFormatException e2) {

                resultlabel.setText("Invalid input");

            }

            }

        });

        btnX.setBounds(145, 179, 49, 23);

        frmCalculator.getContentPane().add(btnX);



        JButton btnX_1 = new JButton("x");

        btnX_1.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                try {

                    double num1 =Double.parseDouble(number1field.getText());

                    double num2 =Double.parseDouble(number2field.getText());

                    double res = num1*num2;

                    resultlabel.setText(String.format("Result: %.3f", res));

                }catch (NumberFormatException e3) {

                    resultlabel.setText("Invalid input");

                }

            }

        });

        btnX_1.setBounds(209, 179, 49, 23);

        frmCalculator.getContentPane().add(btnX_1);



        JButton btnC = new JButton("C");

        btnC.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {

                number1field.setText(" ");

                number2field.setText(" ");

            }

        });

        btnC.setBounds(24, 179, 49, 23);

        frmCalculator.getContentPane().add(btnC);



        number1field = new JTextField();

        number1field.setColumns(10);

        number1field.setBounds(140, 57, 86, 23);

        frmCalculator.getContentPane