overridden « Polymorphism « Java Class Q&A

Home
Java Class Q&A
1.abstract class
2.Base class
3.class hierarchy
4.class name
5.class version
6.Class.forName
7.ClassCastException
8.Clone
9.constant
10.Constructor
11.Development
12.DTO
13.encapsulation
14.equal method
15.extend Class
16.getter
17.hashcode
18.Inheritance
19.inner class
20.interface
21.main class
22.Method
23.NoClassDefFoundError
24.NoSuchMethodError
25.NoSuchMethodException
26.object reference
27.overload
28.parent class
29.Polymorphism
30.private
31.Private Field
32.Recursive
33.setter
34.Static
35.Static Class
36.subclass
37.Super
38.toString
39.Wrapper Class
Java Class Q&A » Polymorphism » overridden 

1. Does the super class not call the overridden method?    stackoverflow.com

I have the following classes:

class foo {
    public void a() {
        print("a");
    }
    public void ...

2. Why can derived classes only sometimes have specialized types in overridden methods?    stackoverflow.com

Let's say I have this base class:

abstract public class Base {
    abstract public Map save();
    abstract public void load(Map data);
}
to my surprise I could do ...

3. In Java can you call a public overridden method from a different class?    stackoverflow.com

Typically an overridden method can be called with super. For example:

public class SuperClass {
   public void something() {
      out("called from super");
   }
}

public ...

4. Polymorphism in Overloaded and Overridden Methods    coderanch.com

Of course it will be compiler error in case 2. Horse class is a descendant to Animal. Animal is more 'wide' class, then the Horse. In terms of 'is-a' Horse is-an Animal, but Animal is-not a Horse. It's correct to assign Horse instance to Animal variable. But on compile time you still are working with Animal variable, and Animal doesn't have ...

java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.