Static Variables and Methods

AP Computer Science A· difficulty 4/5

Calling a static method on an instance reference (<code> obj.staticMethod() </code>)

A
$Polymorphically dispatches based on obj's runtime type$
B
$Compiles and runs, but the method does not bind to obj — only the class$
check_circle
C
$Causes a compile error$
D
$Throws NullPointerException at runtime$

Explanation

Java permits invocation through an instance but warns it. Static binding is by the declared type's class, not the runtime object, and <code> this </code> is unavailable.

Want 10 more like this — adaptive to your weak spots?

Related questions