Checking if a string contains a dot

Question

Today I was trying to detect if a string contains a dot, but my code isn't working

 String s = "test.test";
 if(s.contains("\\.")) {
     System.out.printLn("string contains dot");
 }

Answer 1

contains() method of String class does not take regular expression as a parameter, it takes normal text.

String s = "test.test";

if(s.contains("."))
{
    System.out.println("string contains dot");
}