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Java - Code Samples

 Sample 1. Check whether a reference of AbstractCollection holds a List,Queue or Set

public static void main(String[] args)  {
       AbstractCollection collection = new ArrayList();
       if(collection instanceof AbstractList){
          System.out.println("This is a list");
       if(collection instanceof AbstractQueue){
          System.out.println("This is a Queue");
       if(collection instanceof AbstractSet){
          System.out.println("This is a Set");

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