Example usage for java.util HashSet HashSet

Introduction

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

Prototype

public HashSet()

Source Link

Document

Constructs a new, empty set; the backing HashMap instance has default initial capacity (16) and load factor (0.75).

Usage

From source file:Main.java

public static void main(String[] args) {
    HashSet<Long> hashSet = new HashSet<Long>();
    hashSet.add(new Long("1111111111"));
    hashSet.add(new Long("2222222222"));
    hashSet.add(new Long("3333333333"));
    hashSet.add(new Long("4444444444"));
    hashSet.add(new Long("5555555555"));

    Object obj = Collections.max(hashSet);
    //Object obj = Collections.min(hashSet);
    System.out.println(obj);//from w w w. j  a  va 2  s  . c  o  m
}

From source file:Main.java

public static void main(String[] argv) {
    Set<File> all = new HashSet<File>();
    getAllFileAndFolder(new File("c:\\"), all);
}

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");

    // create an iterator
    Iterator iterator = newset.iterator();

    // check values
    while (iterator.hasNext()) {
        System.out.println("Value: " + iterator.next() + " ");
    }/*w ww  . jav  a  2s .co  m*/
}

From source file:MainClass.java

public static void main(String[] a) {
    Set s = new HashSet();
    s.add("A");//  w  w w.j av  a 2 s.  c  om
    s.add("B");
    s.add("C");
    s.add("D");
    s.add("E");
    s.add("F");
    s.add("H");
    Collections.synchronizedSet(s);
}

From source file:Main.java

public static void main(String[] args) {

    Set<String> s1 = new HashSet<>();

    // Add a few elements
    s1.add("HTML");
    s1.add("CSS");
    s1.add("XML");
    s1.add("XML"); // Duplicate

    // Create another set by copying s1
    Set<String> s2 = new HashSet<>(s1);
    // Add a few more elements 
    s2.add("Java");
    s2.add("SQL");
    s2.add(null); // one null is fine
    s2.add(null); // Duplicate

    System.out.println("s1: " + s1);
    System.out.println("s1.size(): " + s1.size());

    System.out.println("s2: " + s2);
    System.out.println("s2.size(): " + s2.size());
}

From source file:MainClass.java

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

    hs.add("B");/*from   w w  w.jav  a 2s  . c  o  m*/
    hs.add("A");
    hs.add("D");
    hs.add("E");
    hs.add("C");
    hs.add("F");

    System.out.println(hs);
}

From source file:MainClass.java

public static void main(String[] a) {
    Set s = new HashSet();
    s.add("A");//from   ww w . j a v a  2  s .  c o m
    s.add("B");
    s.add("C");
    s.add("D");
    s.add("E");
    s.add("F");
    s.add("H");

    Collections.unmodifiableSet(s);

    s = Collections.unmodifiableSet(s);

    s.clear();
}

From source file:Main.java

public static void main(String[] args) {
    Set<String> names = new HashSet<>();
    names.add("XML");
    names.add("Java");

    Stream<String> sequentialStream = names.stream();
    sequentialStream.forEach(System.out::println);

    Stream<String> parallelStream = names.parallelStream();
    parallelStream.forEach(System.out::println);
}

From source file:Main.java

public static void main(String args[]) {
    // create two hash sets      
    HashSet<String> cloneset = new HashSet<String>();

    HashSet<String> newset = new HashSet<String>();

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

    // clone the hash set
    cloneset = (HashSet) newset.clone();

    System.out.println("Hash set values: " + newset);
    System.out.println("Clone Hash set values: " + cloneset);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    Set collection = new HashSet();

    // For a set or list
    for (Iterator it = collection.iterator(); it.hasNext();) {
        Object element = it.next();
    }/*from   www. ja v  a 2  s  . c o m*/
}