Java – How to get size of Map

Size of Map can be find by size() method. In size method, it will return value in integer.

Example of finding size in Map in Java

Map<Object,String> mp=new HashMap<Object, String>();

mp.put(new Integer(2), "Two");
mp.put(new Integer(1), "One");
mp.put(new Integer(3), "Three");
mp.put(new Integer(4), "Four");

int sizeOfMap=mp.size();

System.out.println("Size of Map :"+sizeOfMap);

Output

Size of Map :4

Tags: Collections