Hash Table

Hallo,
I wanna clear somethings in Hashtable.
How can i use Hashtable as Database?
I've created one hashtable,But I not able to append some new records to that
Hash table.Is it possible?
Could u please clear other features about Hashtable&Vector?
purushothAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Ravindra76Commented:

Hi ,


why are u not able to append???


Use Hashtable's put() methods which will take key value pair.

Use Hashtable get() method to get data.

See your jdkhome\src\java\util\Hashtable.java for api's.

Hashtable as database:


1.Create a class which represent your table.employee as empid,name,salary


Eg: public class Employee {
   public int empId;
   public Stirng name;
   public double salary;
}

Assme that empId is primary key.

Create a object of Employee.

Employee emp = new Employee();
emp.empId = 1;
emp.name="somename",
emp.salary=12000;

Hashtable records = new Hashtable();
records.put(empId,emp);
// Key and value pair

// In some where you can get data as
int empId = 1;
Employee emp = (Employee) records.get(empId);//giving key and getting value

System.out.println("Emp salaey:"+emp.salary);

Best of luck.



0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
purushothAuthor Commented:
Thanx a lot for your guidance.
My doubt was cleared.

Regards,
Purushoth.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Java

From novice to tech pro — start learning today.