str.equals(null) or str==null ?

[AndrewMcDonagh]

"null" is not an object of any class null implies that it does not
refers to any object. So u can not do obj.eqals(null) for any object.
U need to pass as an object as the argument.

in this case you can, as the String.equals() method will return false if
passed a null.

 

[Oliver Wong]

"null" is not an object of any class null implies that it does not
refers to any object. So u can not do obj.eqals(null) for any object.
U need to pass as an object as the argument.

If you actually try it in your compiler, you'll see that
obj.equals(null) compiles just fine, and produces the expected result of
returning false (assuming obj is also not null).

- Oliver