Question

I have big code and such lines:

System.out.println(car.getName());
System.out.println(car.getName() == null);

First line print outs:
null

but second line print outs false, so null == null is false?

I have also tried System.out.println(car.getName() == "null"); since getName returns String but same result

Answer 1

When it comes to String you need to use the equals method:

System.out.println("null".equals(car.getName());

if it actually returns the String “null” which is not the same as null.

Why using equals instead of ==, I can’t find a simpler explanation than this one:

To compare Strings for equality, don’t use ==. The == operator checks to see if two objects are exactly the same object. Two strings may be different objects, but have the same value (have exactly the same characters in them). Use the .equals() method to compare strings for equality.