child « parent class « Java Class Q&A

1. parent package class accessible from child packge class in java?    stackoverflow.com

In java parent package class accessible from child packge class? please explain me any one? example package A.A1.A2 contains class sub package A contains class sup Is there anyway to access sup from sub? pls explain. i ...

2. how can a child class be instanciated using it's parent class?    coderanch.com

hi! I was trying to instanciate the child class object which inherit the properties of the parent class and an error of incompatible type is shown , i did it like this class child cobj= (cobj) new parent (); i explicitely type cast the object but still there the problem i am compiling this program under jdk 1.3 , if there's ...

3. What is parent and child Class?    coderanch.com

Hi and Good Morning to all, May I know what is the difference between the parent and the child classes. I found out that the parent class is the base class and that the child class is derived from it and there is also the ancestor class and decendent, but I do not understand what it all means. Is there any ...

4. Parent class -> Child class    coderanch.com

Rahul.p Kumar wrote: Actually technical term for that is hiding and supposedly overridden class methods are not separate methods, they just don't do what you expect. For instance method, which method to call is decided on runtime based on the object type (run time polymorphism), but in case of class method, there is no ambiguity whose method to call. Remember, how ...

5. Circular dependency between parent class and child class    coderanch.com

public class A { public static void main(String [] args){ B test = new B(); test.doSomething(); } } public class B extends A { public void doSomething(){ System.out.println("I am confused"); } } When I run the code, it works fine. It prints "I am confused" I am a little curious about how will the 2 classes compile? A is the Super ...

6. What happens to parent class object when a child class's object is created?    coderanch.com

Hi all, I had a doubt regarding creation of object in relation to inheritence. Whenever you instantiate a Child class object, the parent class's contructor is also called. In other words, in addition to creating the child's object we are also creating the parent's object(let me know if there is a fallacy in this assumption). My question is that since we ...

7. Casting a child class into a parent class.    java-forums.org

Hi there, new to the forums and plan on staying for a very very long time. :o My question, as the title states: -Is it possible to cast an object of a child class into an object of its parent class and if so, how is it coded? This is what I've been tinkering with thus far.. Example: ChildClass a = ...

8. substract Parent class object from child class    java-forums.org

substract Parent class object from child class Hello , i am new to java. I have to do a salary management software. So i created three classes Ergazomenos (in greek Employee) Proistamenos(in greek Boss) and Dieuthintis . I want to substract(-) an Ergazomenos form Proistamenos if only Ergazomenos belongs to Proistamenos. /* * To change this template, choose Tools ...

9. casting parent class to a child class    forums.oracle.com

10. Clarification of parent child class doubt    forums.oracle.com

11. How can I casting from parent class to children class    forums.oracle.com

Dear, Could someone help me to casting from parent class to children class. I have class like this class parent{ String name; String id; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } } class children extends parent{ ...

12. is there a maximum number of child class a parent class can have?    forums.oracle.com

Enough. Put it this way: if you ever have a design which uses more interfaces than java allows, you're screwed anyway and should fix your design. As for child classes of a parent, I'm 99% sure there's no limit, as the Java compiler doesn't know (or care) who subclasses the parent (remember that you could compile your parent class and three ...