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What is the difference between a while statement and a do statement
A while statement checks at the beginning of a loop to see whether the next loop iterationshould occur. A do statement checks at the end of a loop to see whether the next iterationof a loop should occur. The do statement will always execute the body of a loop at leastonce.
jackshon9
- Jun 27th, 2011
In While loop first condition will be checked and if it is true then code inside condition will performed. While in Do..While loop first code is performed one time afterwords condition will checked.
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When does the compiler supply a default constructor for a class
The compiler supplies a default constructor for a class if no other constructors areprovided.
Suzal Bajrachraya
- May 3rd, 2016
The answer is quite unclear. Can you please go in depth a bit.
Or, Even conscider a code snippet if possible!
Thank you!dpsharma
- Jun 15th, 2009
Compiler provides default constuctor only if there is any no argument constructor present in the super class. If super class has no constructor explicitly defined then also compiler provides default constructor for sub class.
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If a method is declared as protected, where may the method be accessed
A protected method may only be accessed by classes or interfaces of the same package orby subclasses of the class in which it is declared.
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What is the return type of a program's main() method
A program's main() method has a void return type.
sampra
- Feb 13th, 2008
default return typ of any any main method is int but we change it as per requirment if return typ is other than void then must write return stmt
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How is it possible for two String objects with identical values not to be equalunder the == operator
The == operator compares two objects to determine if they are the same object inmemory. It is possible for two String objects to have the same value, but locatedindifferent areas of memory.
Gagan goyal
- Nov 13th, 2011
because == operator only does the shallow comparison .means it compare for the two reference is referring to the same object or not.and when we create the object using new keyword it will always be th...
suraj20p
- Oct 28th, 2011
Create 2 string like this
String s1=new String("Hello");
String s2=new String("Hello");
System.out.println(s1==s2);
2 independent strings,therefore 2 different memories,therefore == evaluates to false -
What are the legal operands of the instanceof operator
The left operand is an object reference or null value and the right operand is a class,interface, or array type.
Digpal Singh Chouhan
- Apr 19th, 2013
The left operand is an object reference or null vale
the right operand is a cla,interface,or aaray typeSandhya.Kishan
- Jul 14th, 2012
The legal operands of instance of operator are
1. Left operand which is an object reference.
2. Right operand which can be a class or an interface. -
Are true and false keywords
The values true and false are not keywords.
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What happens when you add a double value to a String
The result is a String object.
Kevin Leonyx
- Mar 19th, 2015
What happens when we add a double to a string
Sandhya.Kishan
- Jul 14th, 2012
When we add double value to a string it returns a string representation of the double argument.
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How can a dead thread be restarted
A dead thread cannot be restarted.
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What is the difference between static and non-static variables
Rajesh Sakhamuri
- Nov 2nd, 2005
By Rajesh:static variables can be created only one copy,that copy can be shared with all the objects.static class can be access with static members only. non-static members can be access any members.it will depend upon the objects.
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In an HTML form I have a Button which makes us to open another page in 15 seconds. How will do you that
jimmy514in
- Jul 5th, 2010
How about if we create a javascript function which delays the onlick event for 15 seconds and then a window.open method is called to open another window using the delay logic of the javascript..??That wuld work won't it..Please clarify on the same,
vinodkrmenaria
- Feb 28th, 2009
On the on-click of the button create a thread and make it sleep for 5 second and then the action (jsp) file will be called.
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What are virtual functions
mercury
- Sep 7th, 2006
Virtual Functions are useful in implementing polymorphism which is runtime binding/dynamic binding;Whereas Overloading(Function Overloading & Operator Overloading) implement compile-time bind...
gmenon
- Nov 28th, 2005
All methods in Java are virtual i.e. always the most derived version of the method is called
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How do you invoke a Servelt. What is the difference in between doPost and doGet methods
jimmy514in
- May 18th, 2010
doGet():the parameters that are passed appear in teh address bar.There can be security violations since the parameters can be changed.The doGet() functionality is idempotent.The doGet() allows payload...
arshiya
- Nov 7th, 2007
DoGet1.allows only 2k data2.url in the form of name=value pairs (www.getHelp.com?name1=value1&name2=value2doPost1.no limit on data siza2.no name value pairs in the url
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Have you used threads in Servlet
Prasad MN
- Dec 28th, 2012
We can implements SingleThreadModel in Servlets Class.
CodeSandhya.Kishan
- Jul 26th, 2012
Servlets dont run in their own threads. Instead, when a request comes in, the app server removes a thread from a master thread pool and uses it to drive the servlets service method. Once the service method has returned, the thread is returned to the thread pool.
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