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Why return type is not a part of method signature?
Ashok
- Aug 3rd, 2017
Return Type is not part of a method signature..Kindly check again and dont put wrong answer on portal because it will confuse to other.
santh kumar
- Dec 19th, 2006
It's java's Specification that describes like that the return type is not a part of method signature, whether it is method overloading or overriding. U clearly know that the type of parameters can be...
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Can we override the main method?
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ashish_setia- Member Since Oct-2006 | Oct 3rd, 2006
check out this example
class Checkmain{
public static void main(String args[]){
args[1]="ashish";
System.out.println("hello ");
}
}
class Checkmain1 extends Checkmain{
public static void main(String args[]){
System.out.println("how r u");
}}
class Jo{
public static void main(String args[]){
String S[]=new String[10] ;Checkmain.main(S);
Checkmain1.main(S);
}}vivek
- Aug 26th, 2017
Yes you can only do that by overriding main method signature for eg main(String[] args) to main(). Certainly there are no other ways to do that because JVM needs strings array arguments to take comma...
Dharmendra Singh
- Sep 15th, 2016
yes we can"java public class HelloWorld { // arguments are passed using the text field below this editor public static void main(String[] args) { String []s =new Str...
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Need of Polymorphism
What is need of polymorphism in Java? What could have happen if polymorphism is not present?
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syamala235- Member Since Mar-2010 | Apr 8th, 2010
Polymorphism in simple terms means one name many forms. Polymorphism enables one entity to be used as a general category for different types of actions. The specific action is determined by the exact nature of the situation.
Polymorphism exists in three distinct forms in Java:
• Method overloading
• Method overriding through inheritance
• Method overriding through the Java interfacePrashant kumar gupta
- Oct 28th, 2017
We have different behaviors in different situations and in front of different people. A man behaves differently with his father, when he is with his friend he has different behavior. Another best exa...
suraj
- Jun 19th, 2017
Polymorphism means one thing in many form. or one person different behavior is called polymorphism.
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Increment and Decrements Operators
If int=8 then how to solve ++a+a--*a---a++
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JVM is platform independent/dependent? why?
which one is faster in execution Array List or Array? why?
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How would you pass a java integer by reference to another function
Mayank
- Mar 13th, 2018
I don't think that is right because if it was then changing the value inside the called function should reflect the change when the passed variable is accessed in calling function.
sourabharvikar3
- May 4th, 2011
what is point behind sending integer by reference???Still if you want to do so... lookclass Demo{private int i;public static void main(String[] ar){ Demo d=new Demo();&nb...
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Marker interface having no methods right.. then what is the use of marker interface? for what purpose we use marker interface?
One of the "clean" features of the Java programming language is that it mandates a separation between interfaces (pure behavior) and classes (state and behavior). Interfaces are used in Java to specify the behavior of derived classes. Often you will come across interfaces in Java that have no behavior. In other words, they are just empty interface definitions. These are known as marker interfaces....
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Output of Java Program
What is the output of the following program?class A{ public static void main(String[] s) { System.out.println(s[1] + s[2] + s[3]);}}java A 12345Options(i) 1(ii) 12(iii)1234(iv)234(v) Compilation Error
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abuthahir.d- Member Since Jan-2008 | Apr 14th, 2008
Khadar , i tried this code . it gives that exception
for the foll reason :
when u give a CLA(command line argument) , it will be inserted in the index 0 of the array and then will proceed to 1 ,2 ....
so as per the question , "12345" will be at s[0] . and length of that aray will be 1when u try to access s[1] , we are trying for 2nd element which is unavailable.....
Hope this answers u :-)shyamasundar
- Jun 2nd, 2018
(v) Compilation Error
shani
- Mar 14th, 2018
(v) Compilation Error
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Why object class is parent for every class?
Ajay
- Sep 12th, 2018
The main reason is Inheritance. If you observe the methods in Object class, contains the basic methods that every class should contain and they are very basic features or functionalities that every class should have and support.
Also there are many reasons for that...jawaharl0207
- Oct 22nd, 2009
Because it has methods like useful for all the classes, like wait, notify, notifyall, clone and gc, these methods are common use for all classes.
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Is java a fully object oriented programming or not? if not why?
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KanikaKG- Member Since Jul-2008 | Aug 4th, 2008
No. Java is not 100 % Pure OOP because of following three reasons:
1) It doesnot support Multiple inheritance.
2) It allows use of primitive data types which are not an objects.
3) It allows static methods to call without creating the instance.
This disobeys OOPs concepts?
Java isnt 100% pure OOPS coz if it were then everything should be classes and objects, whereas java still has primitive data type which violates the above said statement...SmallTalk is the only 100% pure OOPS languageChaitra
- Jun 6th, 2019
Java is not a pure object oriented programming language because of the primitive data type.
But java can be made 100% object oriented programming language by making use of wrapper classes.Amit Kumar
- May 21st, 2018
Sorry, I am completely agree that java is a pure object oriented language. First of all answer me one question , what do you mean by object oriented programming ? object oriented programming is a conc...
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It is essential to catch all types of exceptions
Visithra.G
- Oct 6th, 2020
It is essential to catch declare throws clause for checked exceptions unchecked exception need not be handled.
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Differences between HashList and HashMap, Set and List
nnandurkar
- Jun 23rd, 2010
Hashtable is syncronised where as HashMap is not. Hence, HashMap is faster.Hasttable does not allow any null value as either key or value. However, HashMap allows multiple null values and one nul...
kayalsuku
- Jun 2nd, 2008
HashMap is an unordered and unsorted map. Allow one null key and many null values. Lists are collections that maintain their elements in order, and can contain duplicates. Set interface do not a...
Core Java Interview Questions
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