TY_BCS_JAVA_SLIP 4_1

Slip 4_1. Write a menu driven program to perform the following operations on a set of integers as shown in the following figure. A load operation should generate 10 random integers (2 digit) and display the no on screen. The save operation should save the no to a file “number.txt”. The short menu provides various operations and the result is displayed on the screen.

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.io.*;

class Slip4_1 extends JFrame implements ActionListener

{

                JMenu m1,m2;

                JMenuBar mb;

                JMenuItem m[];

                JLabel l;

                JTextField t;

                JPanel p;

                StringBuffer ss=new StringBuffer();

                int n;

                int arr[]=new int [20];

                Slip4_1()

                {

                                p=new JPanel();

                                mb=new JMenuBar();

                                m1=new JMenu("Operation");

                                m2=new JMenu("Compute");

                                l=new JLabel("Numbers");

                                t=new JTextField(20);

                                String str[]={"Load","Save","Exit","Sum","Average"};

                                m=new JMenuItem[str.length];

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

                                {

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

                                                m[i].addActionListener(this);

                                }

                                p.add(l);

                                p.add(t);

                                mb.add(m1);

                                mb.add(m2);

                                m1.add(m[0]);

                                m1.add(m[1]);

                                m1.addSeparator();

                                m1.add(m[2]);

                                m2.add(m[3]);

                                m2.add(m[4]);

                                setLayout(new BorderLayout());

                                add(mb,BorderLayout.NORTH);

                                add(p,BorderLayout.CENTER);

                                setSize(300,150);

                                setVisible(true);

                                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                } 

                /*void sortasc()

                  {

                  for(int i=0;i<n;i++)

                  for(int j=0;j<n-1;j++)

                  {

                  if(arr[j]>arr[j+1])

                  {

                  int t=arr[j];

                  arr[j]=arr[j+1];

                  arr[j+1]=t;

                  }

                  }

                  StringBuffer s5=new StringBuffer();

                  for(int i=0;i<n;i++)

                  {

                  s5.append(new Integer(arr[i]).toString());

                  s5.append(" ");

                  }

                  t.setText(new String(s5));

                  }

                  void sortdesc()

                  {

                  for(int i=0;i<n;i++)

                  for(int j=0;j<n-1;j++)

                  {

                  if(arr[j]<arr[j+1])

                  {

                  int t=arr[j];

                  arr[j]=arr[j+1];

                  arr[j+1]=t;

                  }

                  }

                  StringBuffer s5=new StringBuffer();

                  for(int i=0;i<n;i++)

                  {

                  s5.append(new Integer(arr[i]).toString());

                  s5.append(" ");

                  }

                  t.setText(new String(s5));

                  }*/

                public int givesum()

                {

                                int sum=0;

                                for(int i=0;i<n;i++)

                                {

                                                sum=sum+arr[i];

                                }

                                return sum;

                }

                public double giveavg()

                {

                                int sum=0;

                                for(int i=0;i<n;i++)

                                {

                                                sum=sum+arr[i];

                                }

                                return sum/n;

                }

                public void actionPerformed(ActionEvent e)

                {

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

                                if(s.equals("Exit"))

                                                System.exit(0);

                                else if(s.equals("Load"))

                                {

                                                if(arr[0]==0)

                                                {

                                                                int i=0;

                                                                try

                                                                {

                                                                                BufferedReader r=new BufferedReader(new FileReader("new.txt"));

                                                                                String s1=r.readLine();

                                                                                while(s1!=null)

                                                                                {

                                                                                                ss.append(s1);

                                                                                                ss.append(" ");

                                                                                                arr[i]=Integer.parseInt(s1);

                                                                                                n=++i;

                                                                                                s1=r.readLine();

                                                                                }

                                                                }

                                                                catch(Exception eee)

                                                                {       }

                                                                t.setText(new String(ss));

                                                }

                                }

                                else if(s.equals("Save"))

                                {

                                                char ch;

                                                String sss = t.getText();

                                                try

                                                {

                                                                FileOutputStream br1 = new  FileOutputStream("new.txt");

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

                                                                {

                                                                                ch=sss.charAt(i);

                                                                                if(ch == ' ')

                                                                                                br1.write('\n');

                                                                                else

                                                                                                br1.write(ch);

                                                                }

                                                                br1.close();}

                                                                catch(Exception eee)

                                                                { }

                                }

                                else if(s.equals("Sum"))

                                {

                                                t.setText(new Integer(givesum()).toString());

                                }

                                else if(s.equals("Average"))

                                {

                                                t.setText(new Double(giveavg()).toString());

                                }

                }

                public static void main(String arg[])

               

                                Slip4_1 ob = new Slip4_1();

                }

}