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What does g mean in regex?
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Explain about join() method?
Howto get an object that will perform date & time calculations then format it for output in some different locales with different date style.can ne1 tel me the answer of this question.pls
Why you should not use singleton?
what is the context
Explain the difference between abstract class and interface in java?
Why does java have two ways to create child threads?
Tell us something about set interface.
What is immutability in java?
How do you add an element to a hashset in java?
What do you mean by object?
import java.io.*; class Demo { public static void main(String args[]) { File f=new File("1234.msg"); String arr[]=f.list(); System.out.println(arr.length); } }
Give a practical example of singleton class usage?
Core Java 
