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Check for string rotation in Java

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Java Program to determine whether one string is a rotation of another

In this example, we will create a java program to check whether a given string is a rotation of another string.

Program:


public class Main
{    
    public static void main(String[] args) 
	{    
        String str1 = "ABCDEF", str2 = "DEFABC";    
            
        if(str1.length() != str2.length())
		{    
            System.out.println("Second string is not a rotation of first string");    
        }    
        else 
		{    
            str1 = str1.concat(str1);    
            if(str1.indexOf(str2) != -1)    
                System.out.println("Second string is a rotation of first string");    
            else    
                System.out.println("Second string is not a rotation of first string");    
        }    
    }    
}

Output
Second string is a rotation of first string

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