Java Collection Tutorial - Java Map.entrySet()


Map.entrySet() has the following syntax.

Set < Map.Entry < K , V >> entrySet()


In the following code shows how to use Map.entrySet() method.

 //from   ww w.ja  v  a2 s .  c  o m
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class Main {
  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);