operator « cast « Java Data Type Q&A

1. Does instanceof operator generate a lot of overhead ? Why?    stackoverflow.com

I have a colleague here in my project who is deeply against the use of instanceof operator because it "generates a lot of overhead", what is the reason for that ? ...

2. What causes the "Incompatible operand types" error?    stackoverflow.com

I am trying to implement iSortableStack Interface via a class. Here's my main function,

public class SampleStack<E> {
    E ch;

    @SuppressWarnings("unchecked")
    public ...

3. assistance on casting operator    coderanch.com

4. Casting a primitive type into an operator....    forums.oracle.com

5. type cast with operator +=    forums.oracle.com

6. using casting combined with the ternary operator    forums.oracle.com

something = ( (list.get(0) instanceof A? (A) : (B)list.get(0)) ) .getSomething(); Now it says A cannot be resolved. The problem seems to be that you can't have a cast that's not contiguous to the object you're casting: it doesn't have a problem with B, that is next to list.get(0), but it doesn't recognize A. The reason behind my choice of parenthesis ...