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Difference between wait and notify in java
anup21
- Jun 22nd, 2006
wait() and notify() both extend from object class.wait() -- causes current thread to wait until another thread invokes the notify() or notifyAll() method for this object.notify() -- wakes up a single thread that is waiting on this object's monitor.
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What is the difference between equals() method and == operator.when we use 2 same strings for finding of whether both strings r equal or not by using these two,it will give same answers.i.e true and true.so what is the main defference between equals() and ==.
Deepa
- Jun 19th, 2006
"==" checks with identity of variable , if they are same whereas equals checks if both variables have same values. But in case of class objects equals and == behaves the same i.e as identity equator.
psv_bec
- Nov 16th, 2005
Equals method is used to chekcing the two string Objects are same or not. if they are same then returns true value other wise false value.when we are using == operators strings are used as primitive data types.
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How to make immutable collection
sbarik
- Jun 20th, 2006
U can do this by using the following method available in Collectionstatic Collection unmodifiableCollection(Collection c)it will return u an immutable collection.
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The real time environment , when do we go for abstract class and when do we go for interfaces , can any one please revert back in this regard?
sadashivarao
- Jun 18th, 2006
we use the abstract class when we want to specify common featurs of a group of objects, when we dont how to implement them.we use interfaces, when we know the features, but we dont know how...
sadashivarao
- Jun 18th, 2006
we use abstract class when we want specify common features of a group of objects, when we dont know how to implement them.we use interfaces when we know features of a group of objects, but we dont kno...
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_________ can display and edit multiple lines of text
Skill/Topic: AWT & AppletsA) JtextAreaB) JtextfieldC) JtextPaneD) Jeditorpane
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What is the usage of this keyword in java?
suman
- Jun 13th, 2006
I would like to give you an explanation of using this(). Suppose we have class A having method1(), class B extends A having method1().IN lass B we need to call method1() of classB.if we call it ...
ashwinsware
- May 22nd, 2006
Hi Friends, The this keyword in java has two uses It is used to get the current object that is the object on which the curr...
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What is the use of voltile specifier
srinivasaraobora
- Jun 11th, 2006
Hi FriendsVolatile modifier applies to variables only and it tells the compiler that the variable modified by volatile can be changed unexpectedly by other parts of the program. ok bye.........keeps s...
Sumit Malik
- Jun 1st, 2006
Hi... SrinivaS We define a variable as volatile when we are dealing with threads.Declaring variable as volatile tell the compiler to fetch fresh value of variable everytime when its requested as per e...
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ob.a++;
try{
Thread.sleep(1000);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
class C extends Thread
{
C()
{
start();
}
public void run()
{
for(int i=0;i<2;i++)
{
System.out.println("ValueC:"+ob.a);
ob.a++;
try{
Thread.sleep(1000);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
B t1=new B();
C t2=new C();
}
}
">Anybody can explain how it is going to work and why it works soclass A{ int a; A() { a=20; }}class Myth{public static void main(String S[]){final A ob=new A(); class B extends Thread { B() { start(); } public void run() { for(int i=0;i
HSridhar
- Jun 10th, 2006
Good explaination by sunil,I appreciate your clarity.To J2EE expert group, Plz do reply with such an explaination when you provide a valid answer.
sunil_dalvi82
- Apr 29th, 2006
op is ValueB:20ValueC:21ValueB:22ValueC:23Both Classes B and C extend thread, So when constructor is called of each class will create a new thread, which you have started by start().So flow of execut...
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________ enhance performance and functionality in various programming languages
Skill/Topic: AWT & AppletsA) threadsB) constantsC) variablesD) none of the above
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What are all the values for the following level, respectively?max-priority min-prioritynormal-priority
A) 10,1,5B) 1,10,15C) 10,10,5D) 10,5,1
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Can there ever be more than one program running on a single port? In other words, can two applications on the same server have the same port number?
sekhar
- May 30th, 2006
I think we can have two different applications with same name.we can differnciate diffenrent applications by their application names but not with port number.so we can have same port numbers.
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What is real life use of singletone class in java
rgoel79
- May 25th, 2006
Singleton ensures that you have only one object of a particular class per JVM. It is used when you need to refer to same object in say different instances of other classes. e.g. in a servlet, each tim...
Kavitha
- May 22nd, 2006
The best use is, In most of the pooling(Connection Pool) we use singleton to access the connection
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