Let says I have classes A, B and C
B extends A
C extends B
all have public void foo() method defined.
Now from C's foo() method I want to invoke A's foo() method (NOT ... |
class A
{
public void Foo() {}
}
class B extends A
{
}
class C extends B
{
public void Foo() {}
}
Does C's Foo() override A's even though B did not override it? Or do ... |
I'm learning about class inheritance and such in my Java course right now, but I don't understand. When would I use the "super()" call?
Edit:
I found this example of code where super.variable ... |
public class SuperClass
{
public void method1()
{
System.out.println("superclass method1");
this.method2();
...
|
Is it possible to call a super static method from child static method?
I mean, in a generic way, so far now I have the following:
public class BaseController extends Controller {
...
|
A savings account provides compound interest while savings account provides a cheque book facility.
|
I am trying to really understand how inheritance and the super keyword work.
I have the following 4 classes:
People class:
public class People {
public static void main(String[] args) ...
|
|
I come from a web-development background. I've been playing around with a bit of Java recently and have come across the following issue that seems to stem from the strict ... |
Does super has higher priority than outer class?
Consider we have three classes:
- ClassA
- ClassB
- Anonymous class in ClassB that extends ClassA
ClassA.java:
public class ClassA {
protected String var = "A Var";
...
|
I am refactoring some legacy code and have come across a problem which I'm sure has a elegant solution - but I can't quite get there.
Initially there were a load of ... |
Lets suppose I have the following two classes
public class alpha {
public alpha(){
//some logic
}
public void alphaMethod1(){
...
|
I have some class inheritance SubClass < MidClass < SuperClass and want to perform some TASK upward for all these classes. TASK is quite complex with only minor changes in the ... |
I think it's not very useful question, but i think someone can say smth critical.
public class Base{
public void boo(){}
}
public class Derivative extends Base{
1:public void useBoo(){
...
|
I am extending a Class as well as implementing an interface, both contain a method called doFilter , it is a final method in my super class and off course an ... |
I have a question about overriding methods.
if i have class a that has a method that can be overriden by the subclasses but is called in the superclass
public class a {
...
|
Assume that I have these three classes:
class Foo {
void fn() {
System.out.println("fn in Foo");
}
}
class Mid extends ...
|
Hi All, I have following piece of code. class A { private int x; // Private member of class A A() { x = 10; System.out.println("Private member of A x=" + x); System.out.println("In super class A"); } } class B extends A { B() { System.out.println("In Subclass B"); } } public class Main { public static void main(String args[]) { A ... |
Hi there I have been studying java for over a week,it was going well until now I have a question about inheritance and super method I have 3 classes Person, Student , Employee. I was expecting something like "joe",25,"new york","2212-55-1212 "bob",40,"boston","617-55-1212",20000.99 So now i am confused Can you help me !!! public class Person { private String name; private String address; ... |
Hmm, I will try this out. The only thing I was trying to accomplish by putting private string name = "Dagger"; in the Dagger class was to set the name of the Dagger object to Dagger. The book I am reading did not explain the super(name); part of super and sub classes. Will super(name) still work if all variables are private? ... |
I am performing a transformation on Java classes that involves turning instance methods into static methods. It is not problem to pass a reference to 'this' into such a static method. But what if the instance method invokes super? Super cannot be invoked statically; thus I would like to pass 'super' into this method, which is impossible. I suppose creating a ... |
|
so i have a parent class called Gun and i have a protected field called bulletsInGun in the constructor and then i have a a subclass called HandGun that inherits from the Gun class and i am trying to used the field bulletsInGun in the parents class constructor for the HandGun subclass constructor. how would i do that? i tried super.bulletsInGun ... |
System.out.println("Using super is the only case in which the type of\n" + "the reference governs selection of the method implementation\n" + "to be used. An invocation of super.method always uses the\n" + "implementation of method the superclass defines (or\n" + "inherits). It does not use any overriding implementation of\n" + "that method further down the class hierarchy.\n"); |
Thanks for checking my problem! It is not about code really, even though the compiler burps. I want to display several/multiple screens to the user. These screens all share some common items. Notably buttons (exit, enter, help ..) and an 'error line'. I have found the Model/View/Controller idea to be helpful. So I have multiple screens build using MVC. Building the ... |