In this post, we will see how to check if one String is rotation of another or not.
For example:
|
1 2 3 4 5 |
java2blog and blogjava2 are rotation of each other. java2blog and avablog2j are not rotation of each other. |
Approach:
Lets say you need to check whether str1 and str2 is rotation of one another or not.
- Create a new String with
str3=str1+str1 - Check if
str3containsstr2or not. - if
str3containsstr2thenstr2is rotation ofstr1else it is not
Java Program to check if one String is rotation of another.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
package org.arpit.java2blog; public class StringRotationMain { public static void main(String[] args) { System.out.println( "java2blog and blogjava2 are rotation of each other : " + isRotation("java2blog", "blogjava2")); System.out.println( "java2blog and avablog2j are rotation of each other : " + isRotation("java2blog", "avablog2j")); } public static boolean isRotation(String str, String rotation) { String str2 = str + str; if (str2.contains(rotation)) { return true; } return false; } } |
When you run above program, you will get below output:
java2blog and blogjava2 are rotation of each other : true
java2blog and avablog2j are rotation of each other : false
java2blog and avablog2j are rotation of each other : false
That’s all about how to check if one String is rotation of another String in java
Was this post helpful?
Let us know if you liked the post. That’s the only way we can improve.
