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(int initialCapacity)

Source Link

Document

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

Usage

From source file:Main.java

public static void main(String[] args) {
    List<String> myList = new ArrayList<String>();
    myList.add("A");
    myList.add("B");
    myList.add("C");
    myList.add("D");

    Set<String> mySet = new HashSet<String>(myList);

    for (Object theFruit : mySet)
        System.out.println(theFruit);
}

From source file:MainClass.java

public static void main(String[] a) throws Exception {
    String elements[] = { "A", "B", "C", "D", "E" };
    Set set = new HashSet(Arrays.asList(elements));

    FileOutputStream fos = new FileOutputStream("set.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(set);/*w ww .  ja va2  s  .  c o m*/
    oos.close();

    FileInputStream fis = new FileInputStream("set.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Set anotherSet = (Set) ois.readObject();
    ois.close();
    System.out.println(anotherSet);
}

From source file:Main.java

public static void main(String[] args) {

    String text = "a r b k c d se f g a d f s s f d s ft gh f ws w f v x s g h d h j j k f sd j e wed a d f";

    List<String> list = Arrays.asList(text.split(" "));

    Set<String> uniqueWords = new HashSet<String>(list);
    for (String word : uniqueWords) {
        System.out.println(word + ": " + Collections.frequency(list, word));
    }/*from   www .j a v a  2  s .c o m*/
}

From source file:Main.java

public static void main(String[] argv) {
    List<String> arrayList1 = new ArrayList<String>();

    arrayList1.add("A");
    arrayList1.add("A");
    arrayList1.add("B");
    arrayList1.add("B");
    arrayList1.add("B");
    arrayList1.add("C");

    HashSet<String> hashSet = new HashSet<String>(arrayList1);

    List<String> arrayList2 = new ArrayList<String>(hashSet);

    for (Object item : arrayList2)
        System.out.println(item);
}

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    String elements[] = { "I", "P", "E", "G", "P" };
    Set set = new HashSet(Arrays.asList(elements));
    Set set2 = ((Set) ((HashSet) set).clone());
    System.out.println(set2);//from ww  w. j av a  2  s. c  o m
    FileOutputStream fos = new FileOutputStream("set.ser");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    oos.writeObject(set);
    oos.close();
    FileInputStream fis = new FileInputStream("set.ser");
    ObjectInputStream ois = new ObjectInputStream(fis);
    Set set3 = (Set) ois.readObject();
    ois.close();
    System.out.println(set3);
}

From source file:Main.java

public static void main(String[] args) {
    // A string array with duplicate values
    String[] data = { "A", "C", "B", "D", "A", "B", "E", "D", "B", "C" };
    System.out.println("Original array         : " + Arrays.toString(data));

    List<String> list = Arrays.asList(data);
    Set<String> set = new HashSet<String>(list);

    System.out.print("Remove duplicate result: ");

    String[] result = new String[set.size()];
    set.toArray(result);//from w  w w. j av a 2 s .  c  o m
    for (String s : result) {
        System.out.print(s + ", ");
    }
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    List list2 = new LinkedList(list);

    Set set = new HashSet(stuff);
    Set set2 = new TreeSet(set);

    Map map = new HashMap();
    Map map2 = new TreeMap(map);
}

From source file:Main.java

public static void main(String[] argv) throws Exception {

    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    list = Collections.unmodifiableList(list);

    try {//from  w w w  .  j  a v a2 s  .  c om
        list.set(0, "new value");
    } catch (UnsupportedOperationException e) {

    }

    Set set = new HashSet(stuff);
    set = Collections.unmodifiableSet(set);

    Map map = new HashMap();
    map = Collections.unmodifiableMap(map);
}

From source file:Main.java

public static void main(String[] args) throws InterruptedException, ExecutionException {
    List<String> searchList = new ArrayList<String>(7);
    searchList.add("hello");
    searchList.add("world");
    searchList.add("CSS");
    searchList.add("debian");
    searchList.add("linux");
    searchList.add("HTML");
    searchList.add("stack");

    Set<String> targetSet = new HashSet<String>(searchList);
    Set<String> matchSet = findMatches(searchList, targetSet);
    for (String match : matchSet) {
        System.out.println("match:  " + match);
    }//from   w  w  w  .j av a 2  s .  c o  m
}

From source file:KeyboardFocusManagerDemo.java

public static void main(String[] args) {
    JFrame aWindow = new JFrame("This is a Border Layout");
    aWindow.setBounds(30, 30, 300, 300); // Size
    aWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel p = new JPanel();

    p.add(new JTextField(10));
    p.add(new JTextField(10));
    p.add(new JTextField(10));
    p.add(new JTextField(10));
    p.add(new JTextField(10));
    p.add(new JTextField(10));

    Set<AWTKeyStroke> set = p.getFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS);
    set = new HashSet(set);
    KeyStroke up = KeyStroke.getKeyStroke("A");
    set.add(up);//from www  .  j  ava  2  s.c  o m
    System.out.println(set);

    p.setFocusTraversalKeys(KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, set);

    aWindow.add(p);

    aWindow.setVisible(true); // Display the window
}