Size of LinkedHashMap can be obtained in multiple ways like by using an inbuilt function and by iterating through the LinkedHashMap.
Example:
Input : List : [1 : "John", 2 : "Tom", 3 : "Tim"] Output: 3 Input : List : [1 : "John", 2 : "Tom"] Output: 2
Approach 1: using Iteration
- Create a size variable of integer data type and initialize it with 0.
- Start iterating through the LinkedHashMap and increment the size variable at each iteration.
- After completion of the iteration, print size variable.
Below is the implementation of the above approach:
Java
// Java Program to find the size of LinkedHashMapimport java.util.*;public class LinkedHashMapSizeExample {      public static void main(String[] args)    {          // LinkedHashMap Initialization        LinkedHashMap<Integer, String> lhMapColors            = new LinkedHashMap<Integer, String>();          lhMapColors.put(1, "red");        lhMapColors.put(2, "white");        lhMapColors.put(3, "blue");          // Create of size variable and initialize with 0        int size = 0;        for (Map.Entry mapElement :             lhMapColors.entrySet()) {            size++;        }        System.out.println("Size of LinkedHashMap is "                           + size);    }} |
Output
Size of LinkedHashMap is 3
Approach 2: Using size() Method
Syntax:
List.size()
Return Type:
Integer
- Create a size variable of integer data type and initialize it with the size() method.
- Print size variable.
Below is the implementation of the above approach:
Java
// Java Program to find the size of LinkedHashMapimport java.util.LinkedHashMap;public class LinkedHashMapSizeExample {      public static void main(String[] args)    {        // Initialize LinkedHashMap        LinkedHashMap<Integer, String> lhMapColors            = new LinkedHashMap<Integer, String>();          // Add elements        lhMapColors.put(1, "red");        lhMapColors.put(2, "white");        lhMapColors.put(3, "blue");          // Create size variable and initialize        // it with size() method        int size = lhMapColors.size();        System.out.println("Size of LinkedHashMap is "                           + size);    }} |
Output
Size of LinkedHashMap is 3
