size() method

size(): This size string javascript method in java returns the number of elements in TreeMap. Its return type is int.

int size();

import java.util.TreeMap;

public class ExampleOfTreeMap 
{
	public static void main(String[] args) 
	{
		TreeMap<Integer, String> listOfNames = new TreeMap<Integer, String>();
		
		listOfNames.put(1, "JAVA");
		listOfNames.put(2, "GOAL");
		listOfNames.put(3, "RAVI");
		
		System.out.println("Size of list = "+listOfNames.size());
		
		
	}
}

Output: Size of list = 3