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Which of the following classes is used to perform basic console I/O?
A) SystemB) SecurityManagerC) MathD) Runtime
Nitin Prajapati
- Apr 14th, 2015
System
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Core Java Question
Will it compile and run?? If No ... please explain?
java
public class Test{
public static void main(String asd[]){
System.out.println(" Test!! ");
}
}
protected class A{
}
private class B extends A{
}
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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.Java doesnot support Multiline comment
Skill/Topic: AWT & AppletsA) TrueB) False
What is a transient variable
A transient variable is a variable that may not be serialized.
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Editorial / Best Answer
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 ...
What value does readLine() return when it has reached the end of a file
The readLine() method returns null when it has reached the end of a file.
Hanuman Sai
- Sep 21st, 2015
When readLine tries to read beyond the end of a text file it returns the special value null so you can test for null to stop processing a text file read returns -1 when it tries to read beyond the en...
jawaharl0207
- Oct 24th, 2009
It returns null because BufferReader object reading the data as string from the file, at the end if the content is not available it returns null.
Java run-time system is also called as Java Virtual Machine (JVM)
A) TrueB) False
wesam
- Sep 30th, 2015
True
Java Include and Import Statement
What is difference between #include and import statement?
Polymorphism
Explain polymorphism to your 7 year old nephew.
Which of the following methods defined in Thread class are static?
a) sleep()
b) join()
c) start()
d) yield()ankush
- Feb 8th, 2016
Sleep() and Yeild() are static.
Why getInstance() method is used along with class declaration in Java?
komalnk
- Mar 1st, 2016
This is mainly used when there is need of creating an instance of the class.but, when the constructor of class is declared as private. (We cannot create object of object of such class, even inheritance is not possible). So, we use getInstance() method.
sunilbrahmajosyula
- Jan 5th, 2016
It mainly used in singleton class. In the singleton class we will be creating only one object. Where as this getInstance(); will make sure that there is only one copy of an Instance i.e.,copy of an object and returns the single object
What is the difference between panel and frame
Mranal Jadhav
- Jan 17th, 2016
Frame: The frame encapsulate the commonly use windows and it is a subclass of a window that has title bar, menu bar, status bar, borders and windows resizing corners. Panel: The panel is the subclas...
Which package is always imported by default
The java.lang package is always imported by default.
peter
- Jan 18th, 2016
CodeCan methods be overloaded based on the return types
Anonymous
- Mar 3rd, 2016
We can call the method by their name and not by their type;;
Method::
int sum()
void sum()
calling::
Where object is a;
a.sum();
here, it will arise ambiguity which method to call, void sum() or int sum() and thus compiler give error
dheerendra
- Sep 2nd, 2008
Methods cannot be overloaded only on the basis of return type atleast one argument should be different, otherwise compiler will give the message "The function is already defined in the class".
What method is used to specify a container's layout
The setLayout() method is used to specify a container's layout.
Dharmendra Barad
- Mar 26th, 2016
Void setLayout(LayoutManager layoutObj)
Sandhya.Kishan
- Jul 13th, 2012
The method is used to specify a containers layout is setlayout() method.
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