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Which of the following can you perform using the File class? (Select multiple)
A) Change the current directoryB) Return the name of the parent directoryC) Delete a fileD) Find if a file contains text or binary information
preethi
- Nov 12th, 2020
Change the current directory
Welabeau Cava
- Jan 26th, 2011
A) Change the current directoryB) Return the name of the parent directoryC) Delete a file
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Java was conceived by __________
A) MicrosoftB) OracleC) Sun MicrosystemD) Intel
Gangothri
- Oct 20th, 2022
Sun Microsystems
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What does J2SE mean?
A) Java 2 Platform Standard EditionB) Java 2 Internet Standard EditionC) Java 2 Platform Independent Standard EditionD) Java 2 Systems Edition
srinivasa reddy
- Mar 12th, 2012
Java 2 platform stranded Edition
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Abstract class can be declared as final
Skill/Topic: InheritanceA) TrueB) FalseExplanation: An abstract class may not be declared as final.
Buddhadev Dasgupta
- Jan 19th, 2006
Abstract class can't be declare as final.The reasion behind it that, If we declare a class as abstract then we can't intanciate that class ( only we can extend that class) . And if create aa class as ...
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_________ are light-weight components
Skill/Topic: AWT & AppletsA) Swings
karthik
- Jun 13th, 2006
SWINGS are lightweight componenets, They are in 3Dshape
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If i create a object which is to be serialized then do I need to implement any methods?
sitaram81581
- May 22nd, 2006
In order to serialize your object first of all you need to implement 'java.io.serializable' interface and need not implement any methods because 'serializable' is a marker interface which doesn't have...
mujifur
- May 2nd, 2006
Yes suresh you r absolutely correct.I think,Really, Serialized interface containa a single variable orginal form of serialized interface isinterface serialzed{int var=value;(i cant remember the v...
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Imagine there is a class Employee. We create an object of EmployeeEmployee a= New Employee();If we are givingSystem.out.println(a);What gets printed?
It gives the memory location of Employee object.
jay
- Sep 17th, 2006
Actually only ravi gave the exact answer : memory location of Employee object is the default behavior of toString() method inherited by universal Object class
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In what ways java differ from c++ basing oops concept
prawintowin
- Jul 30th, 2006
Hi, Java doesnot support multiple inheritance. This is where java differs from c++. Consider a class called Human and a sub class may be Student, Engineer, Employee. All the three ha...
Ridha
- Apr 13th, 2006
Why do you say java is complete object oriented and c++ is not
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Why operator overloading is not allowed in Java?
sitaram81581
- May 22nd, 2006
Java is a platform independent language, whereas operators are platform-dependent. Each operating system has its own behavior for the operators. If we have overloaded an operator for one operating sys...
Shibaji Paul
- Apr 20th, 2006
Operator overloading may change the universally standard meaning of operators. For example we may overload "+" operator for a particular object which in practice may subtract the values, which definit...
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Is it necessary to use catch block while using try block? Can anybody explain me about it in detail..
vazirahamed
- Apr 8th, 2006
Yes its necessary we need to give atleast one catch block or finally block.TRY-Catch-Finally:try{}catch(IOException e){}catch(FileNotFoundException e){}catch(Exception e){}finally{}Function of th...
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What is exactly difference between throw and throws in java?
imwim
- May 1st, 2010
To manually throw a exception we used throw (user defined exception) and throws are default exception which we used when we use bufferreader.
ajaink2008
- Nov 21st, 2007
Throw is used to pass an exception up to the method that called itThrows is used to indicate that method pass exception to the method that the method called
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What is the class containing all the methods as static?
Sathish.R
- May 23rd, 2006
The class which contains all the methods as static is java.util.collections
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How to make the EXE(JAR) file of any project in java?
gvvskumaran
- Jan 15th, 2007
jar cf jar-file input-file(s) cf=create filejar-file=name of the fileinput-file(s)=the files to be added in jar-file
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Difference between Throw & Throws
1)What is the difference between Throw & Throws?2)Explain the use of transient variable with example?
shanky_06
- Dec 22nd, 2009
Ans.1)With the use of 'throw' it mean that we are simply throwing the exception object(this is explicitly).but using 'throws' with method signature it mean that exception object is thrown implicitly by the method.
arunagar
- Dec 8th, 2009
For Question 1 - Throw we put in Catch block, when we want to throw the exception occured.Throws is written in the signature of the method, when we are anticipating some execption and we want that to ...
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If 10 threads having equal periority and waiting for one particular object (source ), How the source will notify to the particular thread.
sekhar511
- Dec 10th, 2010
By using synchronization concept we can give object locks to only one thread
gopalakrishnan
- Oct 5th, 2007
If 10 threads are waiting for same priority to access a same resource, at that time the control?have a FIFO order by the threads to access a resource.
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What will be the return type of the below overloaded methodpublic void example(int x) {a) int b) charc) short
shaik
- Jan 5th, 2007
Overloading never concerns with return type. Even if the method "void example(int x)" is overloaded with different parameters and no. of parameters the return type is same i.e void mean nothing it is returning.
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What is the difference between Service, doGET, doPOST methods in a servlet.which one will be used when?
vmshenoy
- Jan 6th, 2007
Hi An HTML form has an attribute called "METHOD" that defiines how the date will be send to the server!.The GET method appends the data to teh URL and sends it to server that way!The POST method ...
rajkumar
- Nov 7th, 2006
Service() method designed in such a way that depending up on type of the method it calls either doGet() or doPost() mehtod .doGet() method is preferred to used when we want to send the small amount of...
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