Java HashSet Example Code for add and collect data from HashSet

Example Code for using java.util.HashSet

HashSet is a Class in package java.util we can store data and collect data from HashSet like Array

      

     //Create Instance for HashSet of String  
     HashSet hashSet=new HashSet();  
     //Add data to HashSet ...the same way for list  
     hashSet.add("aa");  
     hashSet.add("bb");  
     hashSet.add("ab");  
     //Check contain data in HashSet  
     System.out.println("HashSet contails "+hashSet.contains("aa"));  
     System.out.println("HashSet contails "+hashSet.contains("cc"));  
     //Loop data in hash Set  
     Iterator it=hashSet.iterator();  
     while(it.hasNext()){  
       System.out.println("HashSet Next Data "+it.next());  
     }  

Result when run program

HashSet contails true
HashSet contails false
HashSet Next Data aa
HashSet Next Data ab
HashSet Next Data bb