Answer Posted / amit

by making package we can include one call in other program

What is immutable state?

960

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What is this () in java?

990

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What is substring in java?

1150

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A person says that he compiled a java class successfully without even having a main method in it? Is it possible?

1016

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Difference between comparator and comparable in java?

1045

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Is java code slower than native code?

1020

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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". } } }

1763

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Why should we use singleton pattern instead of static class?

905

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What are the 8 primitive data types in java?

987

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What is variable length arguments in java?

930

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What are the approaches that you will follow for making a program very efficient?

1030

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Can a class be private in java?

956

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Give me example of derived data types.

1111

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If a variable is declared as private, where may the variable be accessed?

1023

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If an object reference is set to null, will the garbage collector immediately free the memory held by that object?

1102

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