Problem 62 - Size of Java

 Get Size of Java HashSet adalah cara untuk kita menghitung ada berapa input an di suatu variable tersebut.

Dengan Code Di bawah ini

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1. import java.util.HashSet;
2. public class GetSizeOfJavaHashSetExample{
3.   public static void main(String[] args) {
4.    
5.     //create HashSet object
6.     HashSet hSet = new HashSet();
7.    
8.     /*
9.       To get the size of HashSet use
10.       int size() method of HashSet class. It returns the number of elements
11.       stored in HashSet object.    
12.     */
13.     System.out.println("Size of HashSet : " + hSet.size());
14.    
15.     //add elements to HashSet object
16.     hSet.add(new Integer("1"));
17.     hSet.add(new Integer("2"));
18.     hSet.add(new Integer("3"));
20.     System.out.println("Size of HashSet after addition : " + hSet.size());
21.    
22.     //remove one element from HashSet using remove method
23.     hSet.remove(new Integer("1"));
24.     hSet.remove(new Integer("3"));
25.     System.out.println("Size of HashSet after removal : " + hSet.size());
26.   }
27. }

Pertama input an kosong dan saya input 3 angka yaitu 1,2,3 dan disini saya remove 1 dan 3.... jadi tinggal 1 input yang ada