public class Test011 extends Object { public static void main(String args[]) { Test011 t = new Test011(); System.out.print(null.equals(t)); //1 System.out.print(" "); System.out.println(t.equals(null)); //2 } } The answer is: B: The code compiles but at runtime throws NullPointerException at line //1. But I can not compile this code, the compiler throw Error(13) null cannot be dereferenced. Whats happend?? Thank you in advance
Compiler complains because null is not an object. It cannot receive any message (method). Try 5.equals(); null is a literal for assigning a (null) value to any reference variable. by the way are you Spanish?
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