When creating a user defined class for storing objects in a HashMap, which method(s) should be overridden?

The instanceof operator can be used to determine if an object is:

You want subclasses in any package to have access to members of a superclass. Which is the most restrictive access that accomplishes this objective?

When the == comparator is used on two objects, it checks to see if they:

An "overloaded" method has what in common with one (or more) methods on the same class?

Why is it important to override hashCode() when you override equals()?

java.util.Collection is:

What's the output of following error ? class A { public Number getNumber(){ return 1; } } class B extends A { public int getNumber(){ return 2; } } public class Main{ public static void main(String []args){ A a = new B(); System.out.println(a.getNumber()); } }

Anonymous inner classes have access to...

All of the classes in the Java Collections Framework:

Float p = new Float(3.14f); if (p > 3) { System.out.print("p is bigger than 3. "); } else { System.out.print("p is not bigger than 3. "); } finally { System.out.println("Have a nice day."); } What is the result?