How to get size of TreeMap

import java.util.Map;
import java.util.TreeMap;

public class TreeMapKeyCount {

public static void main(String[] args) {

Map<Integer, String> tm = new TreeMap<Integer,String>();

// add key and values
tm.put(1,”java”);
tm.put(2,”cpp”);
tm.put(3,”php”);
tm.put(4,”c”);
tm.put(5, “mysql”);

//print treemap

System.out.println(“TreeMap Is=”+tm);

//Returns the number of key-value mappings in this map

System.out.println(“size of treemap = “+tm.size());

}

}

Output:

TreeMap Is={1=java, 2=cpp, 3=php, 4=c, 5=mysql}

size of treemap = 5

 

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