Java Collection Tutorial - Java HashMap(int initialCapacity) Constructor

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Syntax

HashMap(int initialCapacity) constructor from HashMap has the following syntax.

public HashMap(int initialCapacity)

Example

In the following code shows how to use HashMap.HashMap(int initialCapacity) constructor.

 /*  ww  w .j a  v  a  2  s .  co m*/
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>(10);
    map.put("key1", "value1");
    map.put("key2", "value2");
    map.put("key3", "value3");
   
    System.out.println(map);
  }
}
  

The code above generates the following result.

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