Write a program that performs the basic two mathematical operations addition and subtraction using Layout manager.( File must be save as :Assignment12.java)

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.JLabel;

import javax.swing.JButton;

import java.awt.GridBagLayout;

import java.awt.GridBagConstraints;

import java.awt.Insets;

class Addition extends JFrame

{

            JButton button1=new JButton("Addition");

            JButton button2=new JButton("Subtraction");

            JLabel label1=new JLabel("1st Number: ");

            JLabel label2=new JLabel("2nd Number: ");

            JLabel label3=new JLabel("Result :");

            JTextField textField1=new JTextField("",10);

            JTextField textField2=new JTextField("",10);

            JTextField textField3=new JTextField("",10);

            GridBagConstraints c=new GridBagConstraints();

            GridBagLayout layout=new GridBagLayout();

            public Addition()

            {

                        super("Addition of 2 number's");

                        setLayout(layout);

                        c.gridx=0;

                        c.gridy=0;

                        layout.setConstraints(label1,c);

                        add(label1);

                        c.gridx=1;

                        c.gridy=0;

                        layout.setConstraints(textField1,c);

                        add(textField1);

                        c.gridx=0;

                        c.gridy=1;

                        layout.setConstraints(label2,c);

                        add(label2);

                        c.gridx=1;

                        c.gridy=1;

                        layout.setConstraints(textField2,c);

                        add(textField2);

                        c.gridx=0;

                        c.gridy=2;

                        layout.setConstraints(label3,c);

                        add(label3);

                        c.gridx=1;

                        c.gridy=2;

                        layout.setConstraints(textField3,c);

                        add(textField3);

                        c.gridx=0;

                        c.gridy=3;

                        c.insets=new Insets(10,75,0,0);

                        layout.setConstraints(button1,c);

                        add(button1);

                        c.gridx=1;

                        c.gridy=3;

                        c.insets=new Insets(10,0,0,0);

                        layout.setConstraints(button2,c);

                        add(button2);

                        Calculation cal=new Calculation();

                        button1.addActionListener(cal);

                        button2.addActionListener(cal);

            }

            class Calculation implements ActionListener

            {

                        public void actionPerformed(ActionEvent event)

                        {

                                    int a=Integer.valueOf(textField1.getText());

                                    int b=Integer.valueOf(textField2.getText());

                                    if(event.getSource()==button1)

                                    textField3.setText(String.valueOf(a+b));

                                    else if(event.getActionCommand()=="Subtraction")

                                    textField3.setText(String.valueOf(a-b));

                        }

            }

}

public class Assignment12

{

            public static void main(String args[])

            {

                        Addition addition=new Addition();

                        addition.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                        addition.setSize(400,300);

                        addition.setVisible(true);

            }

}


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