Check if a string is rotation of another WITHOUT concatenating

Question

There are 2 strings , how can we check if one is a rotated version of another ?

For Example : hello --- lohel

One simple solution is by co

Answer 1

    String source = "avaraavar";
    String dest =   "ravaraava";

    System.out.println();
    if(source.length()!=dest.length())
        try {
            throw (new IOException());
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    int i = 0;
    int j = 0;
    int totalcount=0;
    while(true)
    {
        i=i%source.length();    
        if(source.charAt(i)==dest.charAt(j))
        {   
            System.out.println("i="+i+" , j = "+j);
            System.out.println(source.charAt(i)+"=="+dest.charAt(j));
            i++;
            j++;
            totalcount++;   
        }
        else
        {
            System.out.println("i="+i+" , j = "+j);
            System.out.println(source.charAt(i)+"!="+dest.charAt(j));
            i++;
            totalcount++;   
            j=0;
        }
        if(j==source.length())
        {
            System.out.println("Yes its a rotation");
            break;
        }
        if(totalcount >(2*source.length())-1)
        {
            System.out.println("No its a rotation");
            break;
        }
    }