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What is the Collection interface
The Collection interface provides support for the implementation of a mathematical bag -an unordered collection of objects that may contain duplicates.
sujatham
- Aug 2nd, 2007
A basic interface that defines the normal operations that allow a collection of objects to be maintained or handled as a single unit.
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What is the difference between wait(), join(), sleep(), notify() & notifyall() methods
sujatham
- Aug 2nd, 2007
1.wait(),notify(),notifyAll() methods can only be executed on an object whose lock the thread holds, otherwise, the call will result in an IllegalMonitorStateException.2.wait(),notify(),no...
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Suppose If we have variable ' I ' in run method, If I can create one or more thread each thread will occupy a separate copy or same variable will be shared
sujatham
- Aug 2nd, 2007
I we declare variable I like below,volatile int I;each thread will occupy a separate copy of variable I.If we declare a variable I like below,int I;each thread will share the same variable.
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Variable shadowing with example
sujatham
- Aug 2nd, 2007
In the below program local variable is shadowed with field variable.class shadowing{int i=20;System.out.print("Value of i:");System.out.println(i);void method(){int i=10;System.o...
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There is a class in which it has 3 variables: static int ii; transient int j; int k; if we create an object for the above class which is serializable then what are the variables available in the object?
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String b=a+"how r u";
String c=b+"buddy";
How many objects are there in the above code?">String a="hello";String b=a+"how r u";String c=b+"buddy";How many objects are there in the above code?
sadikmca2004
- Jul 17th, 2007
three Different object'su can go through the following progpublic class Demo { public static void main(String ar...
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Name the eight primitive Java type.
mytramesh
- Oct 4th, 2006
We have two type of data types in java those are 1.Primitive data types 2. Referenced Data types or Advanced data types.Primitive datatypes are : these store only singe value.boolean,short,int,char,float,double,byte,longAdvanced Datatypes are :these store group of valuesString,Array,object
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What is class variables and instance variables?
sujatham
- Aug 11th, 2007
Class variable:? 1. Also called as static variable.2. Variable declared?in the class with static modifier.3. These variables are belong to the class.Instance variable:? 1. Variables declared in the class?without?the static modifier.2. These variables are belongs to the objects.
Tafazzul hasan
- Feb 21st, 2007
Class variables belongs to a Classwhere as an instance variable belongs to an Object. A class variable is shared by all the objects of the class. where as every object contain their own instance variable.
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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 order of precedence and associativity, and how are they used
Order of precedence determines the order in which operators are evaluated inexpressions. Associatity determines whether an expression is evaluated left-to-right orright-to-left
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What is a native method
A native method is a method that is implemented in a language other than Java.
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What are the different types of Layouts
agsuvidha
- Aug 14th, 2007
We have various types of layouts in the java.awt package. some are 1) flow layout 2) border layout 3) grid layout 4) card layout 5) gridbag layout
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Class A { void add(); } class B { void add();}class Ex {public static void main(string args[]) {A a=new B();B b=new A();a.add();b.add();}What is the result;
agsuvidha
- Aug 14th, 2007
There is an error in this program. as if u see clearly, class A is an abstract class and abstract class can not be instantiated.
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If we declare main method as private instead of public, Will it execute or not.
kiran
- Aug 16th, 2007
There is no exceptionIn Java the compiler compiles the programe but whenever we execute that we wont get any output because of?access specifier PRIVATE. The main method?does not?not call the member function (methods)
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What is the difference between servlet init( ) and servlet destroy( ) methods?
g4java
- Aug 17th, 2007
Init() is the beginning of the servlets life cycle and destroy is the end of it.
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What is the difference between JRE and JVM?
g4java
- Aug 17th, 2007
We can put it like JVM intigral part of JREJRE supports other applications also like browsers.
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Can we give array size is 0?
Yes
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How to sort an integer array without using array sort ()?
Java Interview Questions
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