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Class A{Public void meth(){}}class B extends A{ Public void meth(){ } public static void main(String args[]){ A a=new A(); a.meth();//which method will this call } }if u want to call a method of class B then how can u achieve this?
sekhar511
- Dec 10th, 2010
This problem is known as "ambiguity problem"We can overcome this by using Interfaces.
bhuvanamsk
- Nov 23rd, 2010
To access a method of derived class create object for class B. B b=new B(); b.meth(); If we access class A 's method meth() will not be called.Subclass B overrides super class. to ac...
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What is TLD?
harris
- Dec 1st, 2011
! TLD is Top level domain, and usually the cheapest domain are dot info
leons0133
- Feb 12th, 2011
TLD is Top level domain. It is located in the right hand part of the domain name. The commonly used TLD are .com, .net, and .org. The .biz, .info and .ws are also used.
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What is meant by inheritance ? Explain with an example
Shahnoor Alam
- Aug 28th, 2017
Inheritance is an OOPS concept by which a class can acquire the characteristics of another class. The class that does the inheriting is called a subclass. Therefore, a subclass is a specialized version of a superclass.
amrutabhavana
- Sep 4th, 2011
Inheritance is acquiring properties of one class from another class, the class which is inherited is called base class and the class which acquir the properties is called derived class. eg: {geshibot...
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Difference between Applet and JApplet
Praneeth Valeti
- Apr 16th, 2017
Japplet provides to use Swings components on an applet.
Applets provides to use AWT components on it for GUI(Graphical User Interface).cool_toad2001
- Mar 25th, 2009
1. JApplet extends Applet 2. Japplet suppurt various pane such as content pane, glass pane,root pane for good look n fillnot supported by applet 3. to add component to applet we call add() of applet where as to add compenent in Japplet we call add() of content pane
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Why is transient modifier used and where in real life?
Many people disturbed me about the solution,some one help me.
anandkumarjha
- Oct 3rd, 2010
Volatile modifier is being used in the field of multithreading because whenever all the threads access to a single variable ,they have their seperate copy of that variable and if they modifies the var...
Raja Chaithanya Bangaru
- Nov 11th, 2005
In Java, all objects are not serializable.In distibuted environment,an object needs to be serializable.(serialization means writing the state of an object to a file using output stream so that it pers...
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Can we declare final variables in side a method.
Mahesh
- Aug 2nd, 2006
Yes, it is possible to declare a final variable inside a method but it is not recommended.
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What are the two ways to create the thread?
A) by implementing RunnableB) by extending ThreadC) Both a and bD) None of the above
ajaykumargurrala
- Jan 11th, 2012
In 2 ways by extending the Thread class & implementing Runnable interface
Hitesh Thakkar
- Oct 23rd, 2011
1. extends the Thread class
2. implements Runnable interface
answer is C -
In order for a source code file, containing the public class Test, to successfully compile, which of the following must be true?
A) It must have a package statementB) It must be named Test.javaC) It must import java.langD) It must declare a public class named Test
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Which of the following methods cause the String object referenced by s to be changed? (Select multiple)
A) s.concat( )B) s.toUpperCase( )C) s.replace( )D) s.valueOf( )
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A method is overridden if there is a method in the subclass that has the same name and the ________ set of parameters.
Skill/Topic: InheritanceA) SameB) DifferentC) MixedD) None of the above
Karuna Reddy
- Jun 6th, 2008
same parameteroverriden: super class, method declared as private than sub class method can't be overriden.super class method declared as defalut ie emepty than subclass method should be the same o...
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__________ code segments must be implemented for an event handler.
Skill/Topic: AWT & AppletsA) OneB) TwoC) ThreeD) Four
murali
- Mar 5th, 2012
Three
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Whether final method can be overridden or not?
H.D.A.sanoj
- Nov 22nd, 2011
We can not override a final method but it is possible to overload.when we use a final key word with a method it'll stop all modifications of the method so we can not override or inherit its properties
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Why we need to serialize the object
balajifortest
- Oct 26th, 2006
Hai, Seralization is the process of converting object into file streams this becausein order to transfer it through out the network.if u use SOAPFormatter it seralizes to XML File where as Binar...
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What is the usage of this keyword in java?
suman
- Jun 13th, 2006
I would like to give you an explanation of using this(). Suppose we have class A having method1(), class B extends A having method1().IN lass B we need to call method1() of classB.if we call it ...
ashwinsware
- May 22nd, 2006
Hi Friends, The this keyword in java has two uses It is used to get the current object that is the object on which the curr...
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Why would I want to make a class final? Doesn't that defeat the whole purpose of OO?
pdommara
- Oct 6th, 2010
If you are sure on that behaiour of your class and sure that no one from outside world should not change the its behaviour, then you can make the class as final. Thats why java have String class as final why bcas java authors dont want to change its bahaviour.
Deepak Sharma
- Dec 22nd, 2006
exactly, it is used only for encapsulation for hiding the information.eg.. string class is also defined as final..if u want to see more than see the rt.jar in which all the classes are defined in jdk141_05jrelibrt.jar.thanx and regardsDeepak Sharma
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