With this example we are going to demonstrate how to get the size of a LinkedHashMap, that is the number of key-value mappings in this LinkedHashMap. In short, to get the size of a LinkedHashMap you should:
- Create a new LinkedHashMap.
- Populate the linkedHashMap with elements, with
put(K key, V value)API method of LinkedHashMap. - Invoke
size()API method of LinkedHashMap. It returns the int number of key-value pairs that the linkedHashMap contains.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.LinkedHashMap;
public class SizeLinkedHashMap {
public static void main(String[] args) {
// Create a LinkedHashMap and populate it with elements
LinkedHashMap linkedHashMap = new LinkedHashMap();
linkedHashMap.put("key_1","value_1");
linkedHashMap.put("key_2","value_2");
linkedHashMap.put("key_3","value_3");
// int size() operation returns the number of key value pairs stored in LinkedHashMap
System.out.println("Size of LinkedHashMap : " + linkedHashMap.size());
}
}
Output:
Size of LinkedHashMap : 3
This was an example of how to get the size of a LinkedHashMap in Java.
