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Can we invoke an applet using servlets?if yes how?
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There are three classes A,B & C. All the three classes have a method called m(). I have to call the method m() from A, B or C according to the argument .For eg. if the argument is int it should call the method m() from class A. If it is char it should call m() from B. if it is string, it should call m() from C. At the same time the caller should not be aware which m() we are calling. What is the solution.
prakash patel
- Feb 11th, 2006
hi friend , calling method through passing object then it casting in formal paramtere.g m(object obj) then cast is this object type in formal parameter.
vmshenoy
- Feb 11th, 2006
See i think what u want can be solved by the concept of Dynamic method dispatch concept. Acc to this conceptclasses has methods with same name and signature.however which method will be executed wil be decided durig executio time.I hop this answers ur question.
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What is the Collection?
MP3DJAY
- Apr 12th, 2006
Collection InterfacesThere are six collection interfaces. The most basic interface is Collection. Three interfaces extend Collection: Set, List, and SortedSet. The other two collection interfaces, Map...
mohan
- Mar 3rd, 2006
Collection is a framework. Which is added in java2.It provides some interfaces,abstract classes, classes and algorithms.Here algorithms are static methods.Collection is an interface in Collections fra...
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When the vector object doubles it's size?
elidoran
- Mar 5th, 2006
Try to avoid the old Vector class. Use the List implementations (LinkedList, ArrayList). If you need them to be synchronized wrap them using Collections.synchronizedList(...). Much better performance this way.
narendra
- Mar 3rd, 2006
When the size of the vector is full
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//Note:before installing Tomcat the code gave no error:Pls give me suggestion">
I get the following error while running a servlet that connects with database.Required:java.sql.Connectionfound:ConnectionThe line is Connection con = DriverManager.getConnection("here the oracle datasource ","user",password");//Note:before installing Tomcat the code gave no error:Pls give me suggestion
kiranbanala
- Apr 16th, 2006
Probabilly classes12.jar file is not there in case of oracle in tomcat shared / lib folderin case of some other database copy its jar filesfor mysql copy mysql-connector-java-3.1.8-bin
Preeti Yadav
- Apr 5th, 2006
wht do u mean by: before installing Tomcat, the code gave no error, how were u executing the code prior to tomcat?The common steps are listed for cross-confirmation.Load the driver thru: Class.forName...
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How to check for repeated patterns in a password?
avneesh1983
- Apr 11th, 2006
By using javascript In javascript we can break a string into small substring and compare each sub string .
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If a class has two synchronized functions, a thread enters one of the synchronized function, then is it possible for another thread to enter the second synchronized function?
sitaram81581
- May 22nd, 2006
In java, once a thread is inside a synchronized method/block , no other thread can call any other synchronized method/block on the same object.
Deepthik
- Apr 13th, 2006
The thread can enter into the other synchroised methods if the other method is ...
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Why identifiers in java does not start with digits?
uafshahid
- Apr 30th, 2006
Considerint a = 10;int b = 2*a;now consider a variable having the name of 2*a then what will happenint 2*a = 89;compiler will be confused and will not consider it as identifierbut consider it as multi...
ramit
- Apr 21st, 2006
simple data
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How we can find the total number of processors available in system?
Deepthik
- Apr 26th, 2006
Number of Processors can be known by using java.lang.Runtime.getRuntime().availableProcessors()
mail2kondeti
- Apr 19th, 2006
You find by using java.lang.Runtime.availableProcessors()Lets give a try.TxSrikanth Kondeti
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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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What is list interface?
srinivas
- May 17th, 2006
Hi,An ordered collection (also known as a sequence). The user of this interface has precise control over where in the list each element is inserted. The user can access elements by their integer...
Madhavikari
- May 10th, 2006
List is an interface which can be used for stroing the elements in inserting order. It allows to store the duplicate elements.And for acceccing the elements, List provide a seperate iterator called ListIterator.
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Garbage collection (object lifetime)
Explain details of concept of"object iceland" in garbage collection (object lifetime) in core java
sujatham
- Jul 28th, 2007
Ans):if a composite object becomes unreachable, then its constituent objects also become unreachable, barring any reachable references to the constituent objects.ex:objects o1, o2, and o3 form a circu...
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fs.write (blk, 0, blk.length);
fs.close();
During writing a file I want use encoding like ISO-8859-1. I can't use Writer because my contents are byte stream. Same way I can't use BufferedOutputStream or DataOutputStream because its not supporting encoding. How do I solve this. Please help me. ">I have a file whose contents are written in french. I want to read that file and edit the file and then write the contents back to the same file. How do I do that?I am reading file content is instanceof ByteBlock only. Then I am using byte[] blk = ((ByteBlock) content).bytes();FileOutputStream fs = new FileOutputStream("a.txt");fs.write (blk, 0, blk.length);fs.close();During writing a file I want use encoding like ISO-8859-1. I can't use Writer because my contents are byte stream. Same way I can't use BufferedOutputStream or DataOutputStream because its not supporting encoding. How do I solve this. Please help me.
Java Interview Questions
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