Question

I have the following Java code:

String p = "seven";
String q = "teen";
p + q == "seventeen";

Why does the last line return false and not true?

Answer 1

Because you should use the equals method for String comparison. The == operator compares the object references, and those are unique for each object. You would only get true for a == comparison when comparing an object to itself.

Try (p + q).equals("seventeen");

Note, that Stringcomparison in java is case-sensitive, so you might also want to take a look at the equalsIgnoreCase method.