Get Size of HashMap - Java Collection Framework

Java examples for Collection Framework:HashMap

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Description

Get Size of HashMap

Demo Code


import java.util.HashMap;
 
public class Main {
 
  public static void main(String[] args) {
    HashMap hMap = new HashMap();
   /*from  w w w. ja  v  a 2  s.c  om*/
    System.out.println("Size of HashMap : " + hMap.size());
   
    //add key value pairs to HashMap using put method
    hMap.put("1","One");
    hMap.put("2","Two");
    hMap.put("3","Three");
    System.out.println("Size of HashMap after addition : " + hMap.size());
   
    //remove one element from HashMap using remove method
    Object obj = hMap.remove("2");
    System.out.println("Size of HashMap after removal : " + hMap.size());
  }
}

Result


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