Why do you override hashcode() method?
Write a thread safe Singleton class.
Remove duplicates from an ArrayList

Question

Why do you override hashcode() method?
Write a thread safe Singleton class.
Remove duplicates from an ArrayList

srinivas · Accepted Answer

Remove Duplicates-
List duplicatesList = new ArrayList();
		duplicatesList.add("1999");
		duplicatesList.add("2000");
		duplicatesList.add("limited");
		duplicatesList.add("1999");
		
		System.out.println(duplicatesList);
		
		Iterator itr = duplicatesList.iterator();
		
		//Set for removing duplicates
		Set origSet = new LinkedHashSet();
		while(itr.hasNext()){
			origSet.add(itr.next());
		}
		System.out.println(origSet);

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