Example usage for java.util HashSet add

Introduction

In this page you can find the example usage for java.util HashSet add.

Prototype

public boolean add(E e)

Source Link

Document

Adds the specified element to this set if it is not already present.

Usage

From source file:MainClass.java

public static void main(String args[]) {
    HashSet<String> hs = new HashSet<String>();

    hs.add("B");
    hs.add("A");/*from w w  w.j ava 2s  . co  m*/
    hs.add("D");
    hs.add("E");
    hs.add("C");
    hs.add("F");

    System.out.println(hs);
}

From source file:Main.java

public static void main(String[] args) {

    HashSet<Integer> hSet = new HashSet<Integer>();

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));

    Iterator itr = hSet.iterator();

    while (itr.hasNext())
        System.out.println(itr.next());
}

From source file:Main.java

public static void main(String[] args) {
    HashSet<String> hashSet = new HashSet<String>();

    hashSet.add("A");
    hashSet.add("B");
    hashSet.add("D");
    hashSet.add("E");
    hashSet.add("F");

    Enumeration e = Collections.enumeration(hashSet);
    while (e.hasMoreElements())
        System.out.println(e.nextElement());
}

From source file:Main.java

public static void main(String[] args) {
    HashSet<String> hashSet = new HashSet<String>();

    hashSet.add("A");
    hashSet.add("B");
    hashSet.add("D");
    hashSet.add("E");
    hashSet.add("F");

    Enumeration e = Collections.enumeration(hashSet);
    while (e.hasMoreElements()) {
        System.out.println(e.nextElement());
    }//from w w  w  .ja va2 s.c  om
}

From source file:Main.java

public static void main(String args[]) {
    HashSet<String> newset = new HashSet<String>();

    newset.add("Learning");
    newset.add("from");
    newset.add("java2s.com");

    System.out.println("Values before remove: " + newset);

    // remove "Easy" from set
    boolean isremoved = newset.remove("from");

    System.out.println("Return value after remove: " + isremoved);

    System.out.println("Values after remove: " + newset);
}

From source file:Main.java

public static void main(String[] args) {
    HashSet<Integer> hSet = new HashSet<Integer>();

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));

    System.out.println(hSet);//from ww  w  .  jav a  2s. c o m

    hSet.clear();

    System.out.println(hSet);

    System.out.println(hSet.isEmpty());

}

From source file:Main.java

public static void main(String[] args) {
    HashSet<Integer> hSet = new HashSet<Integer>();

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));

    System.out.println(hSet);//from  w  ww  .ja v  a 2 s  . co m

    boolean blnRemoved = hSet.remove(new Integer("2"));

    System.out.println(blnRemoved);

    System.out.println(hSet);

}

From source file:Main.java

public static void main(String args[]) {
    HashSet<String> newset = new HashSet<String>();

    // populate hash set
    newset.add("Learning");
    newset.add("from");
    newset.add("java2s.com");

    System.out.println("Size of the set: " + newset.size());
}

From source file:Main.java

public static void main(String args[]) {
    HashSet<String> newset = new HashSet<String>();

    // populate hash set
    newset.add("Learning");
    newset.add("from");
    newset.add("java2s.com");

    // checking elements in hash set
    System.out.println("Hash set values: " + newset);
}

From source file:Main.java

public static void main(String args[]) {
    HashSet<String> newset = new HashSet<String>();

    // populate hash set
    newset.add("Learning");
    newset.add("from");
    newset.add("java2s.com");

    // check the existence of element
    boolean exist = newset.contains("Simply");

    System.out.println("Is the element 'Simply' exists: " + exist);
}