Java Hashtable Example Code for using Hashtable store data and get data

You can use Hasetable to atore data with key and value for example
 key1= data1
 key2= data 2
 key3= data 3

you can use key collect data from Hashtable however you can collect list of key or value with keySet and valuesSet

Example Code to using java Hashtable
** you need to inport java.util package

 package example.util;  
 import java.util.*;  
 public class HashtableExample {  
   public void hashtableExample(){  
     //Create Hashtable Object  
     Hashtable<String,String> hashtable=new Hashtable<String,String>();  
     //Store and Remove data from Hashtable  
     hashtable.put("key1", "value1");  
     hashtable.put("key2", "value2");  
     hashtable.put("key3", "value3");  
     String key3=hashtable.remove("key3");  
     System.out.println("-- Example for Get Value from Hashtable --");  
     System.out.println("Get Hashtable value: "+hashtable.get("key1"));  
     System.out.println("Remove Hashtable value: "+key3);  
     System.out.println("Contains Key Hashtable: "+hashtable.containsKey("key1"));  
     System.out.println("Contains Key Hashtable: "+hashtable.containsKey("key3"));  
     System.out.println("Contains Value Hashtable: "+hashtable.containsValue("value1"));  
     System.out.println("Contains Value Hashtable: "+hashtable.containsValue("value3"));  
     System.out.println("-- Example for Iterate list from Hashtable --");  
     Iterator<String> it=hashtable.keySet().iterator();  
     while(it.hasNext()){  
       String key=it.next();  
       String value=hashtable.get(key);  
       System.out.println("By Key :Key : "+key+"  Value: "+value);  
     }  
     it=hashtable.values().iterator();  
     while(it.hasNext()){  
       System.out.println("Value "+it.next());  
     }  
   }  
   public static void main (String args[]){  
     HashtableExample hashtable=new HashtableExample();  
     hashtable.hashtableExample();  
   }  
 }  

Result when run test

-- Example for Get Value from Hashtable --
Get Hashtable value: value1
Remove Hashtable value: value3
Contains Key Hashtable: true
Contains Key Hashtable: false
Contains Value Hashtable: true
Contains Value Hashtable: false
-- Example for Iterate list from Hashtable --
By Key :Key : key2   Value: value2
By Key :Key : key1   Value: value1
Value value2
Value value1