HashMap: keySet() : HashMap « java.util « Java by API

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Java by API » java.util » HashMap

HashMap: keySet()


 





import java.util.HashMap;

import java.util.Iterator;

import java.util.Set;



public class Main {

  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"));

  }

}

Related examples in the same category

1.	new HashMap < K, V > ()
2.	HashMap: clear()
3.	HashMap: clone()
4.	HashMap: containsKey(Object key)
5.	HashMap: containsValue(Object value)
6.	HashMap: entrySet()
7.	HashMap: get(E o)
8.	HashMap: put(E o, E o1)
9.	HashMap: putAll(Map m)
10.	HashMap: remove(Object key)
11.	HashMap: size()
12.	HashMap: values()

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