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[] args) {
    Map map = System.getenv();

    Set keys = map.keySet();
    Iterator iterator = keys.iterator();
    while (iterator.hasNext()) {
        String key = (String) iterator.next();
        String value = (String) map.get(key);

        System.out.println(key + " = " + value);
    }//from w w w  . ja  va2  s  .  com
}

From source file:MainClass.java

public static void main(String[] s) {
    Hashtable table = new Hashtable();
    table.put("key1", "value1");
    table.put("key2", "value2");
    table.put("key3", "value3");

    Set set = table.entrySet();
    Iterator it = set.iterator();
    while (it.hasNext()) {
        Map.Entry entry = (Map.Entry) it.next();
        System.out.println(entry.getKey() + " : " + entry.getValue());
    }//from   www . j  av a  2s . c  o  m
}

From source file:Main.java

public static void main(String[] a) {
    Map<String, String> map = new HashMap<String, String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
    Set set = map.entrySet();

    Iterator iter = set.iterator();

    while (iter.hasNext()) {
        Map.Entry entry = (Map.Entry) iter.next();

    }/*www .  ja  va 2 s  . c  om*/
}

From source file:MainClass.java

public static void main(String[] a) {
    Map map = new HashMap();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
    map.put(null, null);//ww  w.  j  a v  a 2s  .c o  m

    Set set = map.keySet();

    Iterator iter = set.iterator();

    while (iter.hasNext()) {
        System.out.println(iter.next());
    }
}

From source file:Main.java

public static void main(String[] a) {
    Map<String, String> map = new HashMap<String, String>();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
    Set set = map.entrySet();

    Iterator iter = set.iterator();

    while (iter.hasNext()) {
        Map.Entry entry = (Map.Entry) iter.next();
        System.out.println(entry.getKey() + " -- " + entry.getValue());
    }//from   w  w w .j  a va2 s  .c  o  m
}

From source file:Main.java

public static void main(String[] args) {
    TreeMap<String, String> treeMap = new TreeMap<String, String>();
    treeMap.put("1", "One");
    treeMap.put("3", "Three");
    treeMap.put("2", "Two");

    Set st = treeMap.keySet();
    Iterator itr = st.iterator();
    while (itr.hasNext()) {
        System.out.println(itr.next());
    }//from  w  ww. j  a  va2s . c om
    st.remove("1");

    System.out.println(treeMap.containsKey("1"));
}

From source file:MainClass.java

public static void main(String[] a) {

    Map map = new HashMap();
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
    Set set = map.entrySet();

    Iterator iter = set.iterator();

    while (iter.hasNext()) {
        Map.Entry entry = (Map.Entry) iter.next();
        System.out.println(entry.getKey() + " -- " + entry.getValue());
    }/*from   www  .ja va2  s  .  c  om*/
}

From source file:Main.java

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

    hMap.put("1", "One");
    hMap.put("2", "Two");
    hMap.put("3", "Three");

    Set st = hMap.keySet();
    Iterator itr = st.iterator();

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

    // remove 2 from Set
    st.remove("2");

    System.out.println(hMap.containsKey("2"));
}

From source file:Iterate.java

public static void main(String args[]) {
    String elements[] = { "Irish Setter", "Poodle", "English Setter", "Gordon Setter", "Pug" };
    Set set = new HashSet(Arrays.asList(elements));
    Iterator iter = set.iterator();
    while (iter.hasNext()) {
        System.out.println(iter.next());
    }/*from w w  w .  j a v  a  2 s. c o  m*/
}

From source file:Main.java

public static void main(String args[]) {
    String elements[] = { "I", "P", "E", "G", "P" };
    Set set = new HashSet(Arrays.asList(elements));
    Iterator iter = set.iterator();
    while (iter.hasNext()) {
        System.out.println(iter.next());
    }/*from   w  ww  .j  a  v  a 2 s .  c om*/
}