Example usage for java.util Set add

Introduction

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

Prototype

boolean add(E e);

Source Link

Document

Adds the specified element to this set if it is not already present (optional operation).

Usage

From source file:HashSetExample.java

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

    set.add(new Integer(1));
    set.add(new Integer(2));
    set.add(new Integer(3));
    set.add(new Integer(4));
    set.add(new Integer(5));
    set.add(new Integer(6));
    set.add(new Integer(7));
    set.add(new Integer(8));
    set.add(new Integer(9));
    set.add(new Integer(10));

    // Use iterator to display the vsetes
    System.out.println("HashSet Before: ");
    for (Iterator i = set.iterator(); i.hasNext();) {
        Integer integer = (Integer) i.next();
        System.out.println(integer);
    }//from ww  w. j  a  v  a2s.c  o  m

    // Remove the integer 6
    System.out.println("\nRemove integer 6");
    set.remove(new Integer(6));

    // Use iterator to display the vsetes
    System.out.println("\nHashSet After: ");
    for (Iterator i = set.iterator(); i.hasNext();) {
        Integer integer = (Integer) i.next();
        System.out.println(integer);
    }

}

From source file:Main.java

public static void main(String[] args) {
    Set<Counter> set = new TreeSet<Counter>();

    set.add(new Counter("A", 1));
    set.add(new Counter("B", 5));
    set.add(new Counter("C", 10));
    set.add(new Counter("D", 4));
    set.add(new Counter("E", 3));
    set.add(new Counter("F", 5));
    set.add(new Counter("G", 15));
    set.add(new Counter("H", 225));
    set.add(new Counter("I", 225));
    for (Counter f : set) {
        System.out.println(f);/*from  w  w  w .j  a  va 2 s.  co  m*/
    }
}

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:FindDups.java

public static void main(String[] args) {
    Set<String> s = new HashSet<String>();
    for (String a : args)
        s.add(a);
    System.out.println(s.size() + " distinct words: " + s);
}

From source file:SetStuff.java

public static void main(String[] args) {

    // Create two sets.
    Set s1 = new HashSet();
    s1.add("Ian Darwin");
    s1.add("Bill Dooley");
    s1.add("Jesse James");

    Set s2 = new HashSet();
    s2.add("Ian Darwin");
    s2.add("Doolin' Dalton");

    Set union = new TreeSet(s1);
    union.addAll(s2); // now contains the union

    print("union", union);

    Set intersect = new TreeSet(s1);
    intersect.retainAll(s2);//w  ww.  ja v  a  2 s  .  c  om

    print("intersection", intersect);

}

From source file:Main.java

public static void main(String args[]) {

    Map<String, Boolean> map = new WeakHashMap<String, Boolean>();

    // create a set from map
    Set<String> set = Collections.newSetFromMap(map);

    // add values in set
    set.add("Java");
    set.add("C");
    set.add("C++");
    set.add("from java2s.com");

    // set and map values are
    System.out.println("Set is: " + set);
    System.out.println("Map is: " + map);
}

From source file:SetExampleV2.java

public static void main(String args[]) {
    // create two sets
    Set set1 = new HashSet();
    set1.add("Red");
    set1.add("Green");

    Set set2 = new HashSet();
    set2.add("Yellow");
    set2.add("Red");

    // create a composite set out of these two
    CompositeSet composite = new CompositeSet();

    // set the class that handles additions, conflicts etc
    // composite.setMutator(new CompositeMutator());

    // initialize the composite with the sets
    // Cannot be used if set1 and set2 intersect is not null and
    // a strategy to deal with it has not been set
    composite.addComposited(new Set[] { set1, set2 });

    // do some addition/deletions
    // composite.add("Pink");
    // composite.remove("Green");

    // whats left in the composite?
    Iterator itr = composite.iterator();

    while (itr.hasNext()) {
        System.err.println(itr.next());
    }/*from ww w.j a  v  a  2s  .  c o  m*/
}

From source file:MainClass.java

public static void main(String args[]) {
    Set map = new ArraySet();
    map.add("V");
    map.add("M");
    map.add("N");
    System.out.println(map);//from  ww  w.  jav a  2  s .  c o m
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
    domFactory.setValidating(false);//from  ww w.j a  va2 s . c  om
    domFactory.setNamespaceAware(true);
    domFactory.setIgnoringComments(true);
    domFactory.setIgnoringElementContentWhitespace(true);

    DocumentBuilder builder = domFactory.newDocumentBuilder();
    Document dDoc = builder.parse("C:/data.xsd");

    Node rootNode = dDoc.getElementsByTagName("xs:schema").item(0);
    System.out.println(rootNode.getNodeName());

    XPath xPath1 = XPathFactory.newInstance().newXPath();
    NamespaceContext nsContext = new NamespaceContext() {
        @Override
        public String getNamespaceURI(String prefix) {
            return "http://www.w3.org/2001/XMLSchema";
        }

        @Override
        public String getPrefix(String namespaceURI) {
            return "xs";
        }

        @Override
        public Iterator getPrefixes(String namespaceURI) {
            Set s = new HashSet();
            s.add("xs");
            return s.iterator();
        }
    };
    xPath1.setNamespaceContext((NamespaceContext) nsContext);
    NodeList nList1 = (NodeList) xPath1.evaluate("//xs:schema", dDoc, XPathConstants.NODESET);
    System.out.println(nList1.item(0).getNodeName());

    NodeList nList2 = (NodeList) xPath1.evaluate("//xs:element", rootNode, XPathConstants.NODESET);
    System.out.println(nList2.item(0).getNodeName());
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    JButton component = new JButton("a");

    Set set = new HashSet(component.getFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS));

    set.add(KeyStroke.getKeyStroke("F2"));
    component.setFocusTraversalKeys(KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS, set);

}