Java Program to find keys from a Linked HashMap and store it in a list

Let us first create a LinkedHashMap with key-value pair −

Map<String, String>map = new LinkedHashMap<String, String>(); map.put("1", "Katie"); map.put("2", "Peter"); map.put("3", "Amy"); map.put("4", "Kane"); map.put("5", "Colin"); map.put("6", "Andre"); map.put("7", "Pollard"); map.put("8", "David"); map.put("9", "Jofra"); map.put("10", "Akila");

Now, create a new List and store the keys in it for the above Map −

List<String>list = new ArrayList<String>(); list.addAll(map.keySet());

Example

 Live Demo

import java.util.ArrayList; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; public class Demo {    public static void main(String[] args) {       Map<String, String>map = new LinkedHashMap<String, String>();       map.put("1", "Katie");       map.put("2", "Peter");       map.put("3", "Amy");       map.put("4", "Kane");       map.put("5", "Colin");       map.put("6", "Andre");       map.put("7", "Pollard");       map.put("8", "David");       map.put("9", "Jofra");       map.put("10", "Akila");       List<String>list = new ArrayList<String>();       list.addAll(map.keySet());       System.out.println("Keys...");       for (String str: list) {          System.out.println(str);       }    } }

Output

Keys... 1 2 3 4 5 6 7 8 9 10