Get Size of Java HashMap Example

This Java Example shows how to get the Number of elements in the HashMap object i.e size of HashMap object in java.

Get Size of Java HashMap Example

This Java Example shows how to get the Number of elements in the HashMap object i.e size of HashMap object in java. To get no. of element in the HashMap object we use int size() method. This method returns number of the elements in the specified HashMap object.

 Example: SizeOfHashMap.java

package devmanuals.com;

import java.util.*;

public class SizeOfHashMap {
	public static void main(String args[]) {
		HashMap hm = new HashMap();
		hm.put(1, "Gyan");
		hm.put(2, "Ankit");
		hm.put(3, "Arun");
		hm.put(4, "Anand");
		hm.put(5, "Ram");

		System.out.println("The size of HashMap is : " + hm.size());
		Object obj = hm.remove(3);
		System.out.println("The value of removed key is : " + obj);
		System.out.println("The size of HashMap after alteration is : "
				+ hm.size());

	}
}

Output:

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