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https://www.youtube.com/watch?v=peq4Hp5Z0e8&list=UUhwKlOVR041tngjerWxVccw
HashtableExample.java
Output
https://www.youtube.com/watch?v=peq4Hp5Z0e8&list=UUhwKlOVR041tngjerWxVccw
HashtableExample.java
import java.util.Hashtable; /* * Example of put(K key,V value) method. */ public class HashtableExample { public static void main(String[] args) { Hashtable<String, String> hashtable = new Hashtable<String, String>(); /* * Key = CountryCode,Value = CountryName. * * Maps the specified key to the specified value in this hashtable. * * Neither the key nor the value can be null. The value can be retrieved * by calling the get method with a key that is equal to the original * key. * * Returns: the previous value of the specified key in this hashtable, * or null if it did not have one */ String value = hashtable.put("AF", "AFGHAN"); System.out.println("hashtable : " + hashtable); System.out.println("Previous value associated with key 'AF' : " + value + "\n"); value = hashtable.put("AF", "AFGHANISTAN"); System.out.println("hashtable : " + hashtable); System.out .println("Previous value associated with key 'AF' : " + value); } }
hashtable : {AF=AFGHAN} Previous value associated with key 'AF' : null hashtable : {AF=AFGHANISTAN} Previous value associated with key 'AF' : AFGHAN
https://sites.google.com/site/javaee4321/java-collections/HashtableDemoPutReturn.zip?attredirects=0&d=1
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