Question

Hi
I have to compute if a given string is substring of a bigger string.
For example

String str = "Hallo my world";
String substr = "my"

The method “contains” should return true because str contains substr (false otherwise).

I was looking for something like “contains” at the String class
but I didn’t find it. I suppose that the only solution is to use
pattern matching. If this is the case which would be the better (cheapest) way
to do this?

Thanks!

Answer 1

There is a contains() method! It was introduced in Java 1.5. If you are using an earlier version, then it’s easy to replace it with this:

str.indexOf(substr) != -1