Java Map.size()

Syntax

Map.size() has the following syntax.

int size()

Example

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


 /*from w  w  w.  j  av  a 2  s . c om*/
import java.util.HashMap;
import java.util.Map;

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");

    System.out.println(map.size());
  }
}

The code above generates the following result.