﻿ Java - Check if two given strings are rotations of each other

# Java: Check if two given strings are rotations of each other

## Java String: Exercise-52 with Solution

Write a Java program to check if two given strings are rotations of each other.

Visual Presentation:

Sample Solution:

Java Code:

``````// Importing necessary Java utilities.
import java.util.*;

// Define a class named Main.
class Main {
// Method to check if one string is a rotation of another string.
static boolean checkForRotation(String str1, String str2) {
// Check if both strings have the same length and str2 is found in the concatenated str1+str1.
return (str1.length() == str2.length()) && ((str1 + str1).indexOf(str2) != -1);
}

// Main method to execute the program.
public static void main(String[] args) {
// Define two strings for comparison.
String str1 = "ABACD";
String str2 = "CDABA";

// Print the given strings.
System.out.println("The given strings are: " + str1 + "  and  " + str2);

// Print the concatenation of the 1st string twice.
System.out.println("\nThe concatenation of 1st string twice is: " + str1 + str1);

// Check if the second string is a rotation of the first string.
if (checkForRotation(str1, str2)) {
// Print messages when the rotation is found.
System.out.println("The 2nd string " + str2 + "  exists in the new string.");
System.out.println("\nStrings are rotations of each other");
} else {
System.out.println("The 2nd string " + str2 + "  does not exist in the new string.");
System.out.printf("\nStrings are not rotations of each other");
}
}
}
```
```

Sample Output:

```The given strings are: ABACD  and  CDABA

The concatination of 1st string twice is: ABACDABACD
The 2nd string CDABA  exists in the new string.

Strings are rotations of each other
```

Flowchart:

Java Code Editor:

Improve this sample solution and post your code through Disqus

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿