public class TestingSub {[/size]

[size=3]
public static void main(String []args) {

String test = "WelcomeToJavaWorld";
String testSub = "Java";

int index = matchSub1(test,testSub);

System.out.println("The First Position where the substring \"Java\" where found: " + index);

}
public static int matchSub1(String s, String substring) {

String ss = s;
String sub = substring;

return ss.indexOf(sub);

}

}