Check whether string is palindrome or not

1.Palindrome program in java using for loop

 

1. package com.instaceofjava;
2.  
3. public class PalindromeDemo{  
4.  
5. public static void main(String[] args) {
6.  
7. String str="MADAM";
8. String revstring="";
9.  
10. for(int i=str.length()-1;i>=0;--i){
11. revstring +=str.charAt(i);
12. }
13.  
14. System.out.println(revstring);
15.  
16. if(revstring.equalsIgnoreCase(str)){
17. System.out.println("The string is Palindrome");
18. }
19. else{
20. System.out.println("Not Palindrome");
21. }
22.  
23. }
24. }
    

  Output:

1. The string is Palindrome

 

2.palindrome program in java using stringbuffer

 

1. package com.instaceofjava;
2. import java.util.Scanner;
3.  
4. public class Palindrome {
5.  
6. public static void main(String[] args)
7. {
8.  
9.  Scanner in = new Scanner(System.in);
10.  System.out.println("Enter a string");
11.  String str=in.nextLine();
12.  
13.  StringBuffer strone=new StringBuffer(str);
14.  StringBuffer strtwo=new StringBuffer(strone);
15.  
16.   strone.reverse();
17.  
18.   System.out.println("Orginal String ="+strtwo);
19.   System.out.println("After Reverse ="+strone);
20.  
21.  if(String.valueOf(strone).compareTo(String.valueOf(strtwo))==0)
22.    System.out.println("Result:Palindrome");
23.     else
24.     System.out.println("Result:Not Palindrome");
25.  
26.     }
27. }

 Output:

1. Enter a string
2. MOOM
3. Orginal String =MOOM
4. After Reverse =MOOM
5. Result:Palindrome

Simple palindrome program in java:

3.Program to Check given number is palindrome or not

1. package com.instaceofjava;
2. import java.util.Scanner;
3.  
4. public class Palindrome {
5.  
6. public static void main(String[] args)
7. {
8.  
9.  System.out.println("Please Enter a number : ");
10.  
11.         int givennumber = new Scanner(System.in).nextInt();
12.  
13.         int number=givennumber;
14.         int reverse=0;
15.  
16.         while (number != 0) {
17.  
18.             int remainder = number % 10;
19.             reverse = reverse * 10 + remainder;
20.             number = number / 10;
21.         }            
22.  
23.  if(givennumber == reverse)
24.    System.out.println("Result:Palindrome");
25.     else
26.     System.out.println("Result:Not Palindrome");
27.  
28.     }
29. }

 Output:

1. Please Enter a number : 
2. 535
3. Result:Palindrome

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