StringCompare Method (For String Check GUI)

package week9;

public class StringCompare {

    public static boolean Compare(String s) {

        int count = 0;


        for(int i = 0; i < s.length(); i++) {

            char ch = s.charAt(i);
            int firstIndex = s.indexOf(ch);
            int lastIndex = s.lastIndexOf(ch);

            if(firstIndex != lastIndex)
                return true;
        }

     return false;
    }

}