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An interface contains _________ methods
Skill/Topic: InheritanceA) AbstractB) Non-abstract C) Implemented D) Un-implemented
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What class is the top of the AWT event hierarchy
The java.awt.AWTEvent class is the highest-level class in the AWT event-classhierarchy.
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What are the main differences between Java and C++?
Everything is an object in Java (Single root hierarchy as everything gets derived from java.lang.Object). Java does not have all the complicated aspects of C++ ( For ex: Pointers, templates, unions, operator overloading, structures etc..) The Java language promoters initially said "No pointers!", but when many programmers questioned how you can work without pointers, the promoters began saying "Restricted...
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What is the jdbc and odbc?what is the difference between jar files and bat files
prashant kumar
- Sep 11th, 2016
Clearly explained!! Thank you very much Sir.
speakup87
- Jan 14th, 2009
JDBC: Java Database Connectivity (JDBC) provides Java developers with a standard API (application Programming Interfaces) that is used to access databases, regardless of the driver and database pr...
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What is the difference between a break statement and a continue statement
A break statement results in the termination of the statement to which it applies (switch,for, do, or while). A continue statement is used to end the current loop iteration andreturn control to the loop statement.
sandra
- Jun 13th, 2016
What happens if break is not used in switch statement?
komalnk
- Mar 1st, 2016
A break statement results in the termination of the statement to which it applies (switch,for, do, or while). A continue statement is used to end the current loop iteration and return control to the loop statement.
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The concept of polymorphism is often expressed by the phrase
Skill/Topic: AWT & AppletsA) One interface, multiple methodsB) Multiple interface, one MethodC) Multiple interface, Multiple methodD) One interface, One method
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What is a transient variable
A transient variable is a variable that may not be serialized.
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sivagopal- Member Since Jun-2009 | Jun 8th, 2009
A variable that won't be allowed for object serialisation. so that the state of the value will always be defaulted after the deserialisation.
For example a variable x's value is set to 9, it's default value is '0' say, when the object has been serialized having x's value 9, after deserialisation will be defaulted to '0'
Use: In Java, serialization of an object allowed only when all the underlying objects of the object that is currently under serialization contains has a relationship, will not be allowed, some times the developer has no choice of implementing serializable marker interface on some classes as the classes might have been arrived from a third party and the developer has no control over them, but the developer needs to serialize the object's state, then the developer has the choice of marking the objects that not serializable as transient.
Yogesh Bombe
- Aug 11th, 2015
A transient variable is a variable that cannot be serialized. The transient keyword can be used to indicate the Java Virtual Machine that the variable is not part of the persistent state of the object.
raisha
- May 6th, 2013
transient is a keyword....If a variable is declared as a Transient ,we cant serialize that variable.. The important points about Transient are: 1) Transient keyword can only be applied to fields or ...
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Java - How to convert string to charArray ?
String str="Welcome To GeekInterview.com"
How can convert the above string to charArray without using any buit-in function in java?
Anyone to know the answer.please help me? i am new to learn java.Predict the output of the given code:
javapublic class Test {
private static String msg = "HCL ";
static{
Thread t = new Thread(new Runnable(){
public void run(){
msg = "Technologies ";
}
});
t.start();
}
public static void main(String[] args){
System.out.print(msg);
}}
a) Compiles and prints HCL
b) Compiles and prints Technologies
c) Compiles and...When object is created in Java. Is it during compile time or run time?
Keshav v. devale
- Sep 1st, 2014
Array of object created on run time?
Because user assigned values by runtime
What is the difference between static and non-static variables
A static variable is associated with the class as a whole rather than with specific instancesof a class. Non-static variables take on unique values with each object instance.
sivapurammani
- Dec 17th, 2013
Static variables are class variables, we can access these variables using class name and the variable value remains same for all the objects. Generally we can use these static variables as constants f...
Arvindanathan
- Dec 3rd, 2013
"c //feel it by doing package com.practise; public class StaticStringDemo { static String strObject1; String strObject2; public static void main(String args[]) { StaticStr...
How can we create object of any class without using new keyword?
Devapangu Mangaiah
- Mar 19th, 2012
Using factory method
__________ code segments must be implemented for an event handler.
Skill/Topic: AWT & AppletsA) OneB) TwoC) ThreeD) Four
murali
- Mar 5th, 2012
Three
What is the difference between throw and throws clause, explain in programatically
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Answered by: sri
- Dec 24th, 2005
throw is used to throw an exception manually, where as throws is used in the case of checked exceptions, to reintimate the compiler that we have handled the exception. so throws is to be used at the time of defining a method and also at the time of calling that function, which rises an checked exception.
Prog. to explain diff. b/w throw and throw:
class MyException extends Exception //to create our own exception
{
public String toString() //overriding the method toString() to print the desired msg.
{
return "Can not divide a no. with one: "+"MyException";
}
public static void main(String args[]) throws MyException //use of throws
{
int a=Integer.parseInt(args[0]);
int b=Integer.parseInt(args[1]);
if(b==1)
throw new MyException(); // rises an MyException, if we try to divide a no. with 1
else
System.out.println((float)a/b);
}
}if we want to rise our own exception, we have to use either throws or to handle the exception by try-catch. if not, it gives the compile time error.
and throw is to rise the exception manually, In the above prog. I rised an exception when you try to divide a no with 1.(own Exception)
----sri
muthud
- Nov 22nd, 2011
Exception handling is done by two ways . One is handled by JVM and another is handled by User. JVM does Exception handling by using principle of Exception can be Caught or Declared . Caught is nothin...
micklesharma
- Jul 6th, 2010
Throws is a userdefined exception handling whereas throw is system defined....
WHAT IS THE DIFFERENCE BETWEEN MULTI-THREADING AND MULTI-PROCESSING?
kazi_latiful
- May 23rd, 2011
Multi processing is term that multi program can execute with multi processor that can share the same physical memory space.on the other hand multi-threading is that different program can execute on different time on simultaneously that can share same memory address space.
Vara Rama Krishna Chadaram
- Aug 7th, 2006
MULTI-THREADING :
It refers to the ability of the operating system to execute multiple parts of a process simultaneousliy.
MULTI-PROCESSING:
It refers to the ability of the operating system to execute multiple programs simultameously .The process time is shared between the programs.
Objects are sometimes referred to as __________ of a class
A) InhertienceB) InstancesC) InterfacesD) Inhibitors
kjavaid
- Mar 8th, 2011
Instances.Objects creation in Java is "Instantiating a class". Therefore the the object is an instance of the class.Best Regards,Kamil Javaid
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