java.util.LinkedHashMap class

java.util.LinkedHashMap class

java.util.LinkedHashMap class

• We can store group of objects in the form of key-value pairs in LinkedHashMap object.
• Both key and values are objects only.
• Keys can be unique and values can be duplicate.
• Here group of objects means, it can allow us to store same type of objects and different type of objects.
• Same type means, assuming that all objects are in the form of integer types.
• Different type means, assuming that all objects are in the form of integer, float, String, Student and Customer types also.
• Size will increase dynamically.

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Program         :       Example on LinkedHashMap class

Program name  :       LHMDemo1.java

Output            :         

      {1=Nireekshan, 2=Sravan, 10=Mouli, 9=Mohan, 3=Hari}

     

import java.util.LinkedHashMap;

class LHMDemo1

{

       public static void main(String args[])

       {

             LinkedHashMap linkedHashMap = new LinkedHashMap();

              

             linkedHashMap.put(1, "Nireekshan");

             linkedHashMap.put(2, "Sravan");
             linkedHashMap.put(10, "Mouli");

             linkedHashMap.put(9, "Mohan");

             linkedHashMap.put(3, "Hari");
             

             System.out.println(linkedHashMap );

       }

}

Compile       :         javac LHMDemo1.java

Run             :         java LHMDemo1

Output        :         

     {1=Nireekshan, 2=Sravan, 10=Mouli, 9=Mohan, 3=Hari}

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Thanks for your time.

Nireekshan