/*
Get Size of Java HashMap Example
This Java Example shows how to get the size or nubmer of key value pairs
stored in HashMap using size method.
*/
import java.util.HashMap;
public class GetSizeOfHashMapExample{
public static void main(String[] args) {
//create HashMap object
HashMap hMap = new HashMap();
/*
To get the size of HashMap use
int size() method of HashMap class. It returns the number of key value
pairs stored in HashMap object.
*/
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());
}
}
/*
Output would be
Size of HashMap : 0
Size of HashMap after addition : 3
Size of HashMap after removal : 2
*/
