Java tutorial
public class Main { public static void main(String[] args) { String haystack = "this is a test"; String needle1 = "Java"; int index1 = haystack.indexOf(needle1); if (index1 != -1) System.out.println("The string contains the substring " + needle1); else System.out.println("The string does not contain the substring " + needle1); } } //The string does not contain the substring Java