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Java : Collection Framework : LinkedHashMap (PutReturn)

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Ram N

Posts: 2777
Nickname: ramram
Registered: Jul, 2014

Ram N is Java Programmer
Java : Collection Framework : LinkedHashMap (PutReturn) Posted: Jan 27, 2015 11:52 AM
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Original Post: Java : Collection Framework : LinkedHashMap (PutReturn)
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LinkedHashMapExample.java
import java.util.LinkedHashMap;

/*
* Example of put(K key,V value) method.
*/

public class LinkedHashMapExample
{
public static void main( String[] args )
{

LinkedHashMap<Integer, String> linkedHashMap = new LinkedHashMap<Integer, String>();

/*
* Associates the specified value with the specified key in this map. If
* the map previously contained a mapping for the key, the old value is
* replaced.
*
* Returns: the previous value associated with key, or null if there was
* no mapping for key. (A null return can also indicate that the map
* previously associated null with key.)
*/

String value = linkedHashMap.put(1, "Apple");

System.out.println("Previous value associated with key '1' : " + value);
System.out.println("linkedHashMap : " + linkedHashMap + "\n");

value = linkedHashMap.put(1, "Ball");

System.out.println("Previous value associated with key '1' : " + value);
System.out.println("linkedHashMap : " + linkedHashMap);


}
}
Output
Previous value associated with key '1' : null
linkedHashMap : {1=Apple}

Previous value associated with key '1' : Apple
linkedHashMap : {1=Ball}
To Download LinkedHashMapDemoPutReturn Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/LinkedHashMapDemoPutReturn.zip?attredirects=0&d=1

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