I want to implement an aplication where I have various Objects that can be interpreted as XML Strings. First I thought of making an interface which made each object implement two ... |
I have a class that will be subclassed. All subclasses must contain a static method with the same signature, but differnt for each one.
I would like to have an abstract instance ... |
Why is it not possible to override static methods?
If possible, please use an example.
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Java doesn't allow overriding of static methods
but,
class stat13
{
static void show()
{
System.out.println("Static in base");
...
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Request is an Abstract class with an abstract onFinish method.
Request.authenticate is a static method that instantiates a new Request object. Why is the system not letting me force override onFininsh with ... |
this is how we can override main function in java....
public class animaltest
{
public static void main(String[] args)
{
...
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hi refering to this article http://faq.javaranch.com/view?OverridingVsHiding class Foo { public static void classMethod() { System.out.println("classMethod() in Foo"); } public void instanceMethod() { System.out.println("instanceMethod() in Foo"); } } class Bar extends Foo { public static void classMethod() { System.out.println("classMethod() in Bar"); } public void instanceMethod() { System.out.println("instanceMethod() in Bar"); } } class Test { public static void main(String[] args) { LineX: Foo ... |
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Mughal states that static methods can't be overriden (6.2 p.179,180),but the simple code below proves otherwise I think... class Car { static int doors = 2; } class Ford extends Car { public static void main(String x[]) { doors = doors + 3; } } class Ranger extends Ford { public static void main(String x[]) { doors = doors - 1; ... |
Hello, There's the statement: Static methods cannot be overriden This is not quite correct. You can override static methods but they are hidden: class Parent { public static String getMessage() { return "I am the parent"; } } class Child extends Parent { public static String getMessage() { return "I am the child"; } } public class Test2{ public static void ... |
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The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - ... |
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class A { public static void staticMethod() { System.out.println("Static in A."); } public void nonStaticMethod() { System.out.println("Non-static in A."); } } class B extends A { public static void staticMethod() { System.out.println("Static in B."); } public void nonStaticMethod() { System.out.println("Non-static in B."); } } class Test { public static void main(String[] args) { A myA = new B(); myA.staticMethod(); myA.nonStaticMethod(); } ... |
Ok, I'm having some trouble grasping a concept here for overrindg a static method. I just dont see why you would do this and even if you did, how it's supposed to function. I'm currently reading the SCJP5 Study (Sierra & Bates) guide and I just cant seem to understand the whole overriding thing. What I get from the book is ... |
It is not possible to override an inherited static method...so the Java cert books says. You can only "redefine the method" in a subclass of the superclass that defined the static method. However when in eclipse i try to "redefine" the inherited static method, it will complain if try to narrow the access modifier. The certification book is NOT any clearer ... |
Hi, I was reading queries posted by other so i got one doubt due to following sentences that "You can "override" a non-final static method, although this is actually redefining it and hiding the original method." but what i know that we can not override static method. Am i correct or not,please clear my doubt? i have also created one program ... |
Hi, I was reading queries posted by other so i got one doubt due to following sentences that "You can "override" a non-final static method, although this is actually redefining it and hiding the original method." but what i know that we can not override static method. Am i correct or not,please clear my doubt? i have also created one program ... |
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package main.basics; public class MethodOverridingClass { /** * @param args */ public static void main(String[] args) { new MethodOverridingClass(); System.out.println("--------------"); new ExtendedOverridingClass(); } public MethodOverridingClass() { print(); printStatic(); System.out.println(i); System.out.println(j); } public void print() { System.out.println("Hi. In MethodOverridingClass"); } public static void printStatic() { System.out.println("Hi. In MethodOverridingClass"); } public final int i = 10; public final int j = 10; } ... |
if you define a static method which already there in super class in subclass is called hiding. the rules for overriding and hidding are same. from JLS: 8.4.8.2 Hiding (by Class Methods) If a class declares a static method m, then the declaration m is said to hide any method m', where the signature of m is a subsignature (8.4.2) of ... |
I tried following code to check overriding static methods and variables of super class package com.temp.override; class A { public int x=10; public void method1() { System.out.println("super class method1()"); } public static void method5() { System.out.println("super class static method5()"); } } class B extends A { public int x=20; public void method1() { System.out.println("sub class method1()"); } public static void method5() ... |
I may be way off (since I'm only a beginner) but the first thing that jumped at me from your code is the fact that you made the doStuff() method from your subclass protected which as far as I know limits it's scope of visibility compared to the same method from your superclass. So that might be where you are getting ... |
Dear Friends I had a doubt since long time ,inspite of going through some java articles and posting in java ranch not convincing. my doubt is "According to Java Spec Static methods cannot be overridden.fine.But why rules for overriding are applicable to in hiding of Static methods.". Next is Overriding rules are applicable for hiding of static methods.But the Overriding rules ... |
Kaj- thanks for you reply. I think I was a bit unclear in my first post. You are said something that I took to have the form "X because Y"; I know that both X and Y are true but I question the causality. In particular, you can get at the "other" static methods via reflection (see code at http://unsyntax.net/james/blog/2007/11/16/More-on-Java-statics) or ... |
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Delphi (old formally Object Pascal) supports overriding static methods or just hiding, also. Delphi goes beyond, you can declare a class method as abstract. As a old and good Delphi programmer, sometimes I would like to have a tweak spice its in Java... I think, maybe I need to try a few of C# or I must just content with Java ... |
No. A method is said to be overridden only if it can take the advantage of runtime polymorphism class ClassRoom { static int capacity=50; public static void printCapacity() { System.out.println("Class Room seating capacity "+ capacity); } } class SeminarHall extends ClassRoom { static int capacity =500; public static void printCapacity(){ System.out.println("Seminar Hall seating capacity "+ capacity); } This is not overriding ... |
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A question: Are you trying to call the method "run()" still? Or have you removed that call? Can I see more of your code? In fact, can you post all of it (if not too terribly big) with code tags? Also, when you call "record.getRecord(something)" what does that something represent? How are you initializing this? Also, what is this all for? ... |
Is there a common work-around to achieve this ? Yes, use objects (instances) and abstract methods, if you use (pure) Java. Otherwise, use a programming language capable of defining your own Metaclasses. There has been an extensible Java derivate called "OpenJava", which I think would have pleased your needs, but the project seems stale for some years. Maybe AspectJ may help ... |
I can certainly load the class dynamically. And because I can do that I can chose a different class to load. That however has nothing to do with the fact that the method that run is and always will be associated with one and only one class class. So you certainly do need to "know the exact class". |