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Can you invoke the methods on a Thread once it is stopped?
BattleLr
- Jan 31st, 2007
People ...get the question right.
1) Once thread is in a dead state, it CANNOT be restarted
2) However, its methods and instances will STILL be accessible.
@philip, dude post answers AFTER getting your facts straight...if your're not sure..
write a test code and then BE sure.philipp
- Sep 1st, 2006
No once a thread is stopped.It goes to the dead state hence we cannot invoke methods.If a thread is in suspend state(depricated) we can invoke methods.
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What is transient variable
Srilatha
- Dec 5th, 2006
When an instance variable is declared as transient, then its value need not persistwhen an object is stored.
srinivasaraobora
- Oct 11th, 2006
Hi,This is srinivas from geektalk.When we need not to be serialized an object then we go for object to be declared as transient. this is the real time situation we need to use transient.when we use DT...
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How are Observer and Observable used
Objects that subclass the Observable class maintain a list of observers. When anObservable object is updated it invokes the update() method of each of its observers tonotify the observers that it has changed state. The Observer interface is implemented byobjects that observe Observable objects.
jimmy514in
- Jul 4th, 2010
An observable object can have one or more observers. An observer may be any object that implements interface Observer. After an observable instance changes, an application calling theObservable's noti...
jimmy514in
- Jul 4th, 2010
observer pattern (a subset of the publish/subscribe pattern) is a software design pattern in which an object, called the subject, maintains a list of its dependants, called observers, and notifies the...
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Does garbage collection guarantee that a program will not run out of memory
Garbage collection does not guarantee that a program will not run out of memory. It ispossible for programs to use up memory resources faster than they are garbage collected.It is also possible for programs to create objects that are not subject to garbage collection
TestMeUser
- Jun 18th, 2009
Static objects will never be garbage collected. So try using them if you are desperate to write code that way.
dgiscool
- Oct 9th, 2005
The object is eligible for garbage collection only if there is no strong reference to the object. An exception to this is island of references(where all objects point to each other).And you should ne...
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If a variable is declared as private, where may the variable be accessed
A private variable may only be accessed within the class in which it is declared.
Mithun Challa
- Jan 6th, 2008
It may be accessed in any of the methods defined in that class. Generally for the security of the variables we declare them as private and using the public methods in the class we use them. Makinng sure that variables are accessible only in that class
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How does multithreading take place on a computer with a single CPU
The operating system's task scheduler allocates execution time to multiple tasks. Byquickly switching between executing tasks, it creates the impression that tasks executesequentially.
aseemak
- Dec 22nd, 2007
Hyperthreading processors have more than one execution units but only one processor core, thats how multiple tasks are performed simultaneously
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Which package is always imported by default
The java.lang package is always imported by default.
peter
- Jan 18th, 2016
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What is the purpose of garbage collection
The purpose of garbage collection is to identify and discard objects that are no longerneeded by a program so that their resources may be reclaimed and reused.
sivapurammani
- Dec 17th, 2013
In simple terms we can say garbage collector removes the unreferenced objects from the memory. In general the memory should have some limitation. In JVM for accomplishing tasks we create objects and ...
pardeep131085
- Aug 21st, 2013
garbage collection is the process of looking at heap memory, identifying which objects are in use and which are not, and deleting the unused objects. An in use object, or a referenced object, means th...
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What modifiers may be used with a top-level class
A top-level class may be public, abstract, or final.
mrkab
- Nov 15th, 2007
The modifiers a top-level class can have are public and either abstract or final. A nested class is any class whose declaration occurs within the body of another class or interface. A top level class ...
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Can we add Hashtable/HashMap to a vector
funnyjoy_12
- Sep 6th, 2007
import java.util.*;class HashtableinVector { public static void main(String args[]) throws Exception { Vector v=new Vector(); Hashtable h1=new Hashtable();&n...
penchalaiah
- May 4th, 2007
Write a small code and show how it is possible
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What is the diffrence between an Abstract class and Interface
Sujit4175
- Jun 23rd, 2011
As far as difference is concerned, then the only difference between interface and Abstract class is:?In the interface we can only declare a method, we can not define it within interfaceBut in the abs...
Vijay Chaudhary
- Jul 31st, 2005
Variables declared in Interface are static and final by default.
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Why there are some null interface in java. What does it mean. Give me some null interfaces in JAVA
jimmy514in
- May 18th, 2010
Null Interfaces are markable interfaces. Ex: Cloneable Runnable Serializable Externalizable. SingleThreadModel, Event listener
reddybajjuri
- Mar 27th, 2007
Null Interfaces also know as Marker Interfaces are simply marking the class that implements them.Now when the JVM looks at such a class it allows it to call certain methods.e.g There is a method clone...
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Diff between ArrayList and Vector
sujatham
- Jul 29th, 2007
The Vector and ArrayList classes are implemented using dynamically resizable arrays, providing fast random access and fast list traversal—very much like using an ordinary array. Unlike the Array...
haijing
- Jun 9th, 2007
If you use a Vector in your code and compile it, the compiler will not complain Vector is deprecated. So, I do not think Vector is deprecated. ArrayList is the newer version of Vector, which is not synchronized. ArrayList is recomended for situations where you do not need synchronization.
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What is the Locale class
The Locale class is used to tailor program output to the conventions of a particulargeographic, political, orcultural region.
pon suresh
- Oct 6th, 2012
What is object class in java?
prabakaran29
- Aug 19th, 2012
The locale class to used to tailor program output to the conventions of a particular geographic, political, or cultural region
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What is the use of having finally?
chaithanya chatla
- Dec 28th, 2012
Finally block having the statements which are releasing the resource, closing the streams, closing the connection and so on. If exception is raised or not but closing the resource are necessary. So we can keep statements inside the finally block those should be get executed compulsory.
Ajit4U
- Dec 24th, 2012
Finally is the block which will be executed irrespective of exception caught in catch block.
Hence it is useful to do any resource releasing/ connection closing after exception handling
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