Answer Posted / tarun

Any class declared by final cannot be subclassed.

Any variable declared with final its value remain constant
that is declared at the time of declaring it.

Any method declared with final in a class can not be
override with other class.

finalize() method is called by the Garbage Collector on an
object when there is no more reference to the object.

finally method is used in exception handling with try-catch
block. try block can not be used alone, it should be used at
least with catch or finally. In catch block we catch(handle)
the exception type that occured during the execution and in
finally we write some code like closing file, connection,
garbag collect any object that is of no more useful in our
application.

What does null mean in java?

631

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542

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538

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Is it possible to instantiate the abstract class?

540

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what is difference betweem home interface and remote interface?

2118

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583

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What are the different http methods?

534

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When we serialize an object does the serialization mechanism saves its references too?

508

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Is string a class?

556

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Is there any way to find whether software installed in the system is registered by just providing the .exe file? I have tried the following code but its just displaying the directory structure in the registry. Here the code : package com.msi.intaller; import java.util.Iterator; import ca.beq.util.win32.registry.RegistryKey; import ca.beq.util.win32.registry.RootKey; public class RegistryFinder { public static void main(String... args) throws Exception { RegistryKey.initialize(RegistryFinder.class.getResource("jRe gistryKey.dll").getFile()); RegistryKey key = new RegistryKey(RootKey.HKLM, "Software\\ODBC"); for (Iterator subkeys = key.subkeys(); subkeys.hasNext();) { RegistryKey subkey = subkeys.next(); System.out.println(subkey.getName()); // You need to check here if there's anything which matches "Mozilla FireFox". } } }

1351

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How many types of the indexof method are there for strings?

491

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What is main difference between variable and constant?

532

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What are the methods of object class ?

563

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How many types of keywords are there?

564

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What is this keyword in java?

567

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