TY_BCS_JAVA_22_1

Slip 22_1. Write a menu driven program to perform following operations. Accept operation accept the two number using input dialog box. GCD will compute the GCD of two numbers and display in the message box and power operation will calculate the value of aⁿ and display it in message box where “a” and “n” are two inputted values.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.io.*;

class Slip22_1 extends JFrame implements ActionListener

{

                JMenu m1,m2;

                JMenuBar mb;

                JMenuItem m[];

                StringBuffer ss=new StringBuffer();

                int n;

                int arr[]=new int [20];

                int n1,n2,gcd,pow;

                public Slip22_1()

                {

                                mb=new JMenuBar();

                                m1=new JMenu("Operation");

                                m2=new JMenu("Compute");

                                String str[]={"Accept","Exit","GCD","Power"};

                                m=new JMenuItem[str.length];

                                for(int i=0;i<str.length;i++)

                                {

                                                m[i]=new JMenuItem(str[i]);

                                                m[i].addActionListener(this);

                                }

                                mb.add(m1);

                                mb.add(m2);

                                m1.add(m[0]);

                                m1.add(m[1]);

                                m2.add(m[2]);

                                m2.add(m[3]);

                                setLayout(new BorderLayout());

                                add(mb,BorderLayout.NORTH);

                                setSize(300,150);

                                setVisible(true);

                                setLocation(500,200);

                                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                } // constructor

                public void actionPerformed(ActionEvent e)

                {

                                String s=e.getActionCommand();             //return the name of menu

                                if(s.equals("Exit"))

                                                System.exit(0);

                                if(s.equals("Accept"))

                                {

                                                n1=Integer.parseInt(JOptionPane.showInputDialog("Enter 1st no for Number"));

                                                n2=Integer.parseInt(JOptionPane.showInputDialog("Enter 2nd no for Number"));

                                }

                                if(s.equals("GCD"))

                                {

                                                int min;                                

                                                if(n1>=n2)

                                                                min=n1;

                                                else        min=n2;

                                                for(int i=1;i<=min;i++)

                                                {

                                                                if(n1%i==0 && n2%i==0)

                                                                                gcd=i;

                                                }

                                                JOptionPane.showMessageDialog(null,"GCD = "+gcd); 

                                }

                                if(s.equals("Power"))

                                {

                                                pow=1;                                

                                                for(int i=1;i<=n2;i++)

                                                {

                                                                pow=pow*n1;

                                                }

                                                JOptionPane.showMessageDialog(null,"Power = "+pow);           

                                }

                }

                public static void main(String a[])

                {

                                new Slip22_1();

                }

}