TY_BCS_JAVA_SLIP 2_1

Slip 2_1. Write a menu driven program to perform the following operations on a set of integers as shown in the following fig. the load operation should generate 10 random integer(2 digit) and display the number on screen. The save operation should save the number 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 Slip2_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];

                Slip2_1()

                {

                                p=new JPanel();

                                mb=new JMenuBar();

                                m1=new JMenu("Operation");

                                m2=new JMenu("Sort");

                                l=new JLabel("Numbers");

                                t=new JTextField(20);

                                String str[]={"Load","Save","Exit","Ascending","Descending"};

                                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 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("Ascending"))

                                {

                                                sortasc();

                                }

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

                                {

                                                sortdesc();

                                }

                }

                public static void main(String arg[])

                {

                                Slip2_1 c =new Slip2_1();

                }

}