LinkedHashMap in Java

LinkedHashMap in Java

LinkedHashMap class are Implementer class of Map Interface which contains values based on the key. It implements the Map interface and extends HashMap class.

Points to Remember

• LinkedHashMap contains only unique elements.
• LinkedHashMap have one null key or can have multiple null values.
• It is same as HashMap instead maintains insertion order.

import java.util.*;
class LinkedHashMapDemo
{
public static void main(String args[])
{  
   
  LinkedHashMap<Integer,String> tm=new LinkedHashMap<Integer,String>();  
  lhm.put(1,"Deo");  
  lhm.put(2,"zen");  
  lhm.put(3,"porter");  
  lhm.put(4,"piter");  
  
 for(Map.Entry m:lhm.entrySet())
 {  
   System.out.println(m.getKey()+" "+m.getValue());  
 }
 }  
}  

1 Deo
2 zen  
3 porter  
4 piter