A palindrome is a number or a text phrase that reads the same backwards as forwards. For example, each of the following five-digit integers is a palindrome: 12321, 55555, 45554 and 11611. Write a C++ program that reads in a five-digit integer and determines whether it is a palindrome .

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Question:

1. Using the NetBeans IDE make a new project to modify the SmallO.java program (file attached) so that it now repeats the loop five times and then stops.

2. Using the IDE make a new project to modify the SmallO.java program (file attached) so that integers instead of Strings are entered by the user.

 

3. Using the IDE make a new project to modify the SmallO.java program (file attached) so that it only loops until the number -999 is entered by the user.

NOTE: SmallO.java file image attached

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Answer:

Step 1

The original program is as follows.

 

ORIGINAL PROGRAM

import java.util.Scanner;

public class SmallIO
{
 public static void main(String[] args) {
     
     Scanner keyboard = new Scanner(System.in);
     String a = "";   //initializing to empty String
     
     //infinite loop, use Ctrl-C (from command prompt) to quit
    while(true)
     { 
         System.out.println("Enter a line: ");
         a = keyboard.nextLine();
         System.out.println("Your line: "+ a);
         System.out.println();
     }   //loop ends
 }   // main ends
}   // class ends

Step 2

1. Using the NetBeans IDE make a new project to modify the SmallIO.java program (file attached) so that it now repeats the loop five times and then stops.

 

The java program is as follows.

 

PROGRAM

import java.util.*;
import java.lang.*;

public class SmallIO
{
 public static void main(String[] args) {
     
     Scanner keyboard = new Scanner(System.in);
     String a = "";   //initializing to empty String
     int loop=0;     //variable to control loop execution
     
     //loop executes 5 times
     while(loop<5)
     {
         System.out.println("Enter a line: ");
         a = keyboard.nextLine();
         System.out.println("Your line: "+ a);
         System.out.println();
         
         loop++;     //loop variable incremented
     }   //loop ends
 }   // main ends
}   // class ends

Step 3

2. Using the IDE make a new project to modify the SmallIO.java program (file attached) so that integers instead of Strings are entered by the user.

 

The java program is as follows.

 

PROGRAM

import java.util.*;
import java.lang.*;

public class SmallIO
{
 public static void main(String[] args) {
     
     Scanner keyboard = new Scanner(System.in);
     int n;   //declaring an integer variable
    
     
     //infinite loop, use Ctrl-C (from command prompt) to quit
     while(true)
     {
         System.out.println("Enter a number: ");
         n = keyboard.nextInt();
         System.out.println("Your number: "+ n);
         System.out.println();
         
     }   //loop ends
 }   // main ends
}   // class ends

Step 4

3. Using the IDE make a new project to modify the SmallIO.java program (file attached) so that it only loops until the number -999 is entered by the user.

 

The java program is as follows.

 

PROGRAM

import java.util.*;
import java.lang.*;

 

public class SmallIO
{
 public static void main(String[] args) {
     
     Scanner keyboard = new Scanner(System.in);
     String a = "";   //initializing to empty String
     
     int n=1;    //variable to test if -999 is entered
     
     //infinite loop, use Ctrl-C (from command prompt) to quit
    while(n!=-999)
     { 
         System.out.println("Enter a line: ");
         a = keyboard.nextLine();
         System.out.println("Your line: "+ a);
         System.out.println();
       
         System.out.println("Enter -999 to quit. Enter any other number to continue.");
         n = keyboard.nextInt();
         if(n==-999)
         {
             System.out.println("Exiting."); break;
         }
     }   //loop ends
 }   // main ends
}   // class ends