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How can you convert a String value into integer and viceversa in Java
r.praveenkumar
- Nov 19th, 2007
String s="10";int a= Integer.parseInt(s); //Integer.parseInt() method is used to convert str to int
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What is synchronization and why is it important
With respect to multithreading, synchronization is the capability to control the access ofmultiple threads to shared resources. Without synchronization, it is possible for onethread to modify a shared object while another thread is in the process of using orupdating that object's value. This often leads to significant errors.
bijuleo
- Nov 8th, 2007
Synchronization is the mechanism that ensures that only one thread is accessed the resources at a time. In a practical point of view assume that two threads are trying to update bank balance at the sa...
priya
- Sep 13th, 2007
Synchronisation is a phenomenon in multithreaded programming which enforce synchronicity when we need it. For eg, if we want two threads to share a complicated datastructure?we need to ensure that th...
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What is the use of assertion?
dear_srik
- Oct 27th, 2007
Assertions are kind of mechanisms in java from 1.4 onwards, where assert is a keyword. By using assertions you can validate your assumptions. Assertions should be only used to validate certain assumpt...
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What is meant by interface
skmeer
- Oct 24th, 2007
Interface is used to define set of rules. Interface is a collectionof empty methods. It is solely used as a base class. Class which implents an interface need to provide the implemenation of the methods in the interface.
riteshyadav14@rediffmail.com
- Sep 8th, 2005
Its a java way to deal with multiple inheritance .....
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What is the Collections API
The Collections API is a set of classes and interfaces that support operations oncollections of objects.
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What is the difference between normal validations (validator.xml) and struts validations?
sree2880
- Oct 6th, 2007
difference in validator.xml and dyna validator is:validator.xml :In this we have to set the bean like"examplebean.java" where as in dynavalidator or struts validations we assign t...
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What is the List interface
The List interface provides support for ordered collections of objects.
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What is method Overloading ? What is this in OOPS
aravind.dev
- Oct 2nd, 2007
Its a common mistake to assume that overloading is a kind of polymorphism in OOPS..But its actually not..However the definition is the same.. an entity existing in different forms is called polymorphi...
kmhariharan
- Sep 15th, 2005
Method Overloading : In oops,it is Polymorphism,(i.e) one which takes more than One Form. Method Overloading means same method Name and Different arguments or parameters.Example public class ...{public int add(int x,int y){.....}public float add(float x,float y){....}}
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Q.1 :write a program to reverse a string without using reverse method.please give an example of such a program.Q.2 :how can we concatenate two strings without using concatenate operatorplease give an example.
renji_reshma
- Oct 1st, 2007
#include<iostream.h>int main(){char name[80],name1[80];int i,j;cout<<"nEnter string to be reversed:";cin.getline(name,80);i=j=0;while(name[i]!='')i++;while(--i>=0)name...
renji_reshma
- Oct 1st, 2007
#includ<iostream.h>int main(){char name[80],name1[80];int i,j;cout<<"nEnter string to be reversed:";cin.getline(name,80);i=j=0;while(name[i]!='')i++;while(--i>=0)name1...
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What are interfaces?
Interfaces provide more sophisticated ways to organize and control the objects in your system. The interface keyword takes the abstract concept one step further. You could think of it as a “pure” abstract class. It allows the creator to establish the form for a class: method names, argument lists, and return types, but no method bodies. An interface can also contain fields, but The interface keyword...
subroto
- Sep 28th, 2007
Interfaces are the Pure Abstract class.which is use in java for the multiple inheritance. As we know that in java multiple inheritance is not possible,Interface is the Answer for this problem.
sahu
- Dec 9th, 2005
Interface: What a Class must do, But not how-to. Bridge for the communication when the caller does not know to whom he is calling. Describes externally visible behavior of element. Only Public members...
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}
}
public class test1 extends test
{
public void say()
{
super.hello();
hello();
}
public void main(String arg[])
{
test1 t = new test1();
t.say();
}
}
In the above code what will be difference of super.hello(); and hello();. What is use of super instead of calling directly method name.
">Public class test{ public void hello() { System.out.println("Helllo"); }}public class test1 extends test{ public void say(){ super.hello(); hello();}public void main(String arg[]){ test1 t = new test1(); t.say();}}In the above code what will be difference of super.hello(); and hello();. What is use of super instead of calling directly method name.
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What is Difference between AWT and Swing
pdommara
- Sep 6th, 2007
AWT are not?pure?Java develpoed components. So they? behave (color) differently from one?platform to another platforms.Where as Swings are pure?Java?components. So they behave same in all?platforms.
san
- Nov 8th, 2005
Awt means abstract window toolkit it sis based on gui swing is latest version for awt with some extra features.
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Can we add Hashtable/HashMap to a vector
funnyjoy_12
- Sep 6th, 2007
import java.util.*;class HashtableinVector { public static void main(String args[]) throws Exception { Vector v=new Vector(); Hashtable h1=new Hashtable();&n...
penchalaiah
- May 4th, 2007
Write a small code and show how it is possible
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How to clone the objects?
funny
- Sep 6th, 2007
In shallow cloning, any modifications done to the cloned object will also affect the original object whereas in deep cloning, any modifications done to the cloned object will not affect the original object.
kiranbabug
- Mar 23rd, 2006
What are shallow copy and deep copy in the cloning of objects.Please give me some ex.
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What is the difference between C++ & Java
pdommara
- Sep 6th, 2007
I can say?first and main?diffrence between C++?and Java is Garbage collection.C++ : We need to do? garbage collcetion manually.Java : Java provide automatic?garbage collection.
Sharmila_S
- Mar 28th, 2007
These are some of the main differences that comes in to my mind:Java doesnt have pointers Java doesnt have automatic type conversionJava does not support operator overloadingInstance variables are automatically initialised
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What do you know about the garbate collector
pdommara
- Sep 6th, 2007
The name "garbage collection" implies that objects that are no longer needed by the program are "garbage" and can be thrown away.
Java Interview Questions
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