Program: Basic LinkedHashMap Operations.

Here you can find example code for basic LinkedHashMap operation. It shows how to create object for LinkedHashMap, adding elements, getting size, checking empty or not, remove, etc.

package com.java2novice.linkedhashmap;

import java.util.LinkedHashMap;

public class BasicLinkedHashMap {

	public static void main(String a[]){
		
		LinkedHashMap<String, String> lhm = new LinkedHashMap<String, String>();
		lhm.put("one", "This is first element");
		lhm.put("two", "This is second element");
		lhm.put("four", "this element inserted at 3rd position");
		System.out.println(lhm);
		System.out.println("Getting value for key 'one': "+lhm.get("one"));
		System.out.println("Size of the map: "+lhm.size());
		System.out.println("Is map empty? "+lhm.isEmpty());
		System.out.println("Contains key 'two'? "+lhm.containsKey("two"));
		System.out.println("Contains value 'This is first element'? "
							+lhm.containsValue("This is first element"));
		System.out.println("delete element 'one': "+lhm.remove("one"));
		System.out.println(lhm);
	}
}

{one=This is first element, two=This is second element, four=this element inserted at 3rd position}
Getting value for key 'one': This is first element
Size of the map: 3
Is map empty? false
Contains key 'two'? true
Contains value 'This is first element'? true
delete element 'one': This is first element
{two=This is second element, four=this element inserted at 3rd position}