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How do you create a Reader object from an InputStream object?
A) Use the static createReader( ) method of InputStream class.B) Use the static createReader( ) method of Reader class.C) Create an InputStreamReader object, passing the InputStream object as an argument to the InputStreamReader constructor.D) Create an OutputStreamReader object, passing the InputStream object as an argument to the OutputStreamReader constructor.
Rahul Kolhe
- Sep 14th, 2011
Create an outputstreamreader object, passing the inputstream object as an argument to the outputstreamreader constructor
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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 is the main difficulties that you are faced in your project
suraj20p
- Oct 28th, 2011
If u are working with struts,and your form bean scope is session,then its difficult to manage the state of radio button,checkbox and select box,since they dont participate in the url request formation.
We can use reset() to solve these problem -
instanceOf operator
what is difference between instanceOf operator and getclass()
suraj20p
- Oct 28th, 2011
instanceOf() is an operator used to find out whether an object is of instance of certain class or not eg: String str=new String(); //here str is an object of String class Sop(str.instanceOf(String));...
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Package Program
How to create a package program and what is the step to use a package program and how to run this type of programs?
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What is the difference between Applet and japplet?What are the traverses in binary tree? Write down how will you create a Binary tree? What is constructor and virtual function? Can we call a virtual function in a constructor? give example.
rizwan
- Oct 23rd, 2011
Muthukrishnan ...
i think Applet is a super class and JApplet is a sub class ..!
Rizwan ..!rohit dwivedi9450
- Jul 28th, 2007
Applet is a smart program which compile on the server and runs on our console.
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Java valueOf( ) method
What is the use of valueOf( ) method?
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Advantage of java
What is the main advantage of java when compared to other programing languages...?
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Which arithmetic operations can result in the throwing of an ArithmeticException
Integer / and % can result in the throwing of an ArithmeticException.
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Java object variable and class variable
What is the difference between object variable and class variable..?
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What is the difference between a Scrollbar and a ScrollPane
A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. AScrollPane handles its own events and performs its own scrolling.
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How to find size of string in java
How to know that a string require how much bytes in memory......
Ex. String s="abc";
String s=new String("abc");
How much memory is used for s and s2 -
Why java is not 100% object oriented?
pradeep choubey
- Oct 3rd, 2011
Because in c language we use primitive data type such as int , char , boolean but c is not object oriented language. but java use all primitive type object so we can say that java is not 100 % oop lang..
abhi_csedas
- Aug 5th, 2009
Java is an OOP language but not a pure Object Oriented Programming Language.There are six qualities to make a programming language to be pure Object Oriented. They are: i) Encapsulation/Data Hiding ii...
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How many threads at a time can access a monitor?
A) oneB) twoC) noneD) three
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MVC Advantages
What is MVC and what are its advantages?
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Why compiler does not provide default constructor ?
Why compiler does not provide default constructor if there is any parametrized constructor is provided by programmer.?
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System is a class or a package?
class Test
{
public static void main(String... a)
{
System.out.println("hello world");
}
}
In the above code if we write "s" of String class in lowercase, it gives an error of class not found, but if we write "S" of "System" class in lower case it gives an error package not found.
why?amrutabhavana
- Sep 4th, 2011
System is class.it belongs to the lang package."System.out.println" means println is a method which is called by out object of system class.
Prabha
- Aug 10th, 2011
System is a class which is available in lang package and we need not to create object. When we give System as system compiler searches in the package and gives an error.
String is also a class and we can create objects to handle character strings and it is a reference datatype -
Use of Static
What is the use of static in (public static void main string args[])
amrutabhavana
- Sep 4th, 2011
We can use static key word for any method which does not require an object to call, so main method is automatically called by the JVM so it does not require any object it is mentioned as static. We ca...
Suresh
- Aug 6th, 2011
Without creating instance of that class to invoke the main method static keyword is used, by giving the name of the class main method gets invoked.
Java Interview Questions
Ans