LinkedHashMap in Java

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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.

linkedhashmap

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.

Example of LinkedHashMap

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());  
 }
 }  
}  

Output

1 Deo
2 zen  
3 porter  
4 piter

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