Java/src/main/java/com/examplehub/basics/set/HashSetExample.java at patch-1 · letscode-17/Java · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
package com.examplehub.basics.set;

import java.util.HashSet;

public class HashSetExample {
  public static void main(String[] args) {
    HashSet<String> hashSet = new HashSet<>();
    hashSet.add("Java");
    hashSet.add("Python");
    hashSet.add("HTML");
    hashSet.add("C");

    /*
     * [Java, C, HTML, Python]
     */
    System.out.println(hashSet);

    hashSet.add("Java");

    /*
     * [Java, C, HTML, Python]
     */
    System.out.println(hashSet);

    /*
     * Java
     * C
     * HTML
     * Python
     */
    for (String item : hashSet) {
      System.out.println(item);
    }

    /*
     * true
     */
    System.out.println(hashSet.contains("Java"));

    /*
     * true
     */
    System.out.println(hashSet.remove("Java"));

    /*
     * [C, HTML, Python]
     */
    System.out.println(hashSet);

    hashSet.clear();

    /*
     * []
     */
    System.out.println(hashSet);
  }
}