The entryset method of a Java Map is used to provide a Set “view” of the Map. Since Map is not iterable, this method provides a way to iterate over the key-value pairs. Let’s look at it in action:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
import java.util.HashMap;
import java.util.Set;

class Streams {
  public static void main(String[] args) {
    HashMap<String, String> map = new HashMap<String, String>();
    map.put("hello", "world");
    map.put("hola", "mundo");

    Set<HashMap.Entry<String, String>> set = map.entrySet();
    for (HashMap.Entry<String, String> entry : set) {
      System.out.println("Key: " + entry.getKey() + " Value: " + entry.getValue());
    }
  }
}

The output of this program is:

1
2
Key: hello Value: world
Key: hola Value: mundo
[ data_structures  java  programming  ]
Adding a drawer to your Android app
Create a navigation menu for your Android app
Using Google+ id tokens from an Android app
Google+ sign-in on Android
Java Generics