Example usage for java.util Set iterator

Introduction

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

Prototype

Iterator<E> iterator();

Source Link

Document

Returns an iterator over the elements in this set.

Usage

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   w w w .j  a  v  a 2s.  co m*/
}

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From source file:Main.java

public static void main(String[] a) {
    Map<String, String> yourMap = new HashMap<String, String>();
    yourMap.put("1", "one");
    yourMap.put("2", "two");
    yourMap.put("3", "three");

    Map<String, Object> map = new LinkedHashMap<String, Object>();

    List<String> keyList = new ArrayList<String>(yourMap.keySet());
    List<String> valueList = new ArrayList<String>(yourMap.values());
    Set<String> sortedSet = new TreeSet<String>(valueList);

    Object[] sortedArray = sortedSet.toArray();
    int size = sortedArray.length;

    for (int i = 0; i < size; i++) {
        map.put(keyList.get(valueList.indexOf(sortedArray[i])), sortedArray[i]);
    }//  ww  w.ja  v a2 s  .  c  om

    Set ref = map.keySet();
    Iterator it = ref.iterator();

    while (it.hasNext()) {
        String i = (String) it.next();
        System.out.println(i);
    }
}

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From source file:Main.java

public static void main(String[] args) {
    Integer[] numbers = { 7, 7, 8, 9, 10, 8, 8, 9, 6, 5, 4 };

    List<Integer> list = Arrays.asList(numbers);
    Set<Integer> set = new HashSet<Integer>(list);

    for (Iterator iterator = set.iterator(); iterator.hasNext();) {
        Object o = iterator.next();
        System.out.print(o + ", ");
    }/*from  ww w  . ja v  a  2  s .  c  o  m*/
}

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From source file:Main.java

  public static void main(String[] argv) throws Exception {
  Set result = new HashSet();
  String serviceType = "KeyFactory";
  Provider[] providers = Security.getProviders();
  for (int i = 0; i < providers.length; i++) {
    Set keys = providers[i].keySet();
    for (Iterator it = keys.iterator(); it.hasNext();) {
      String key = (String) it.next();
      key = key.split(" ")[0];

      if (key.startsWith(serviceType + ".")) {
        result.add(key.substring(serviceType.length() + 1));
      } else if (key.startsWith("Alg.Alias." + serviceType + ".")) {
        result.add(key.substring(serviceType.length() + 11));
      }// ww  w .ja  va 2s.  c  o  m
    }
  }
  System.out.println(result);
}

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From source file:Main.java

public static void main(String[] args) {
    HashMap<String, Integer> map = new HashMap<String, Integer>();
    map.put("d", 5);
    map.put("c", 4);
    map.put("b", 2);
    map.put("a", 1);

    Integer value[] = new Integer[map.size()];

    Set keySet = map.keySet();
    Iterator t = keySet.iterator();
    int a = 0;/*from ww  w  .  java  2s.c o  m*/
    while (t.hasNext()) {
        value[a] = map.get(t.next());
        a++;
    }

    Arrays.sort(value);

    for (int i = 0; i < map.size(); i++) {
        t = keySet.iterator();
        while (t.hasNext()) {
            String temp = (String) t.next();
            if (value[i].equals(map.get(temp))) {
                System.out.println(value[i] + " = " + temp);
            }
        }
    }
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    Set defaults = UIManager.getLookAndFeelDefaults().entrySet();
    for (Iterator i = defaults.iterator(); i.hasNext();) {
        Map.Entry entry = (Map.Entry) i.next();
        System.out.print(entry.getKey() + " = ");
        System.out.println(entry.getValue());
    }//from   www.j a  va2 s .c om

}

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From source file:HashMapExample.java

public static void main(String[] args) {
    Map<Integer, String> map = new HashMap<Integer, String>();

    map.put(new Integer(1), "One");
    map.put(new Integer(2), "Two");
    map.put(new Integer(3), "Three");
    map.put(new Integer(4), "Four");
    map.put(new Integer(5), "Five");

    System.out.println("Map Values Before: ");
    Set keys = map.keySet();
    for (Iterator i = keys.iterator(); i.hasNext();) {
        Integer key = (Integer) i.next();
        String value = (String) map.get(key);
        System.out.println(key + " = " + value);
    }//from  www.jav  a  2 s  . c o m

    System.out.println("\nRemove element with key 6");
    map.remove(new Integer(6));

    System.out.println("\nMap Values After: ");
    keys = map.keySet();
    for (Iterator i = keys.iterator(); i.hasNext();) {
        Integer key = (Integer) i.next();
        String value = (String) map.get(key);
        System.out.println(key + " = " + value);
    }
}

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From source file:HTDemo2.java

public static void main(String args[]) {
    Hashtable<String, Double> balance = new Hashtable<String, Double>();

    String str;//w  w  w.j a v a  2 s  .c  o m
    double bal;

    balance.put("A", 3434.34);
    balance.put("B", 123.22);
    balance.put("C", 1378.00);
    balance.put("D", 99.22);
    balance.put("E", -19.08);

    Set<String> set = balance.keySet();

    Iterator<String> itr = set.iterator();
    while (itr.hasNext()) {
        str = itr.next();
        System.out.println(str + ": " + balance.get(str));
    }

    System.out.println();

    bal = balance.get("A");
    balance.put("A", bal + 1000);
    System.out.println("A's new balance: " + balance.get("A"));
}

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From source file:TreeMapExample.java

public static void main(String[] args) {
    Map<Integer, String> map = new TreeMap<Integer, String>();

    // Add Items to the TreeMap
    map.put(new Integer(1), "One");
    map.put(new Integer(2), "Two");
    map.put(new Integer(3), "Three");
    map.put(new Integer(4), "Four");
    map.put(new Integer(5), "Five");
    map.put(new Integer(6), "Six");
    map.put(new Integer(7), "Seven");
    map.put(new Integer(8), "Eight");
    map.put(new Integer(9), "Nine");
    map.put(new Integer(10), "Ten");

    // Use iterator to display the keys and associated values
    System.out.println("Map Values Before: ");
    Set keys = map.keySet();
    for (Iterator i = keys.iterator(); i.hasNext();) {
        Integer key = (Integer) i.next();
        String value = (String) map.get(key);
        System.out.println(key + " = " + value);
    }//w ww .ja  va2s .  c  o  m

    // Remove the entry with key 6
    System.out.println("\nRemove element with key 6");
    map.remove(new Integer(6));

    // Use iterator to display the keys and associated values
    System.out.println("\nMap Values After: ");
    keys = map.keySet();
    for (Iterator i = keys.iterator(); i.hasNext();) {
        Integer key = (Integer) i.next();
        String value = (String) map.get(key);
        System.out.println(key + " = " + value);
    }
}

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From source file:Main.java

  public static void main(String[] argv) throws Exception {
  Set result = new HashSet();
  Provider[] providers = Security.getProviders();
  for (int i = 0; i < providers.length; i++) {
    Set keys = providers[i].keySet();
    for (Iterator it = keys.iterator(); it.hasNext();) {
      String key = (String) it.next();
      key = key.split(" ")[0];

      if (key.startsWith("Alg.Alias.")) {
        // Strip the alias
        key = key.substring(10);//from ww  w. j av  a  2 s  .  c  o m
      }
      int ix = key.indexOf('.');
      result.add(key.substring(0, ix));
    }
  }
  System.out.println(result);
}

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