Help me choose a datastructure please - urgent

Question

hi all,i have a very serious problem,to which i am not able to find the solution.the problem is as follows
i have a large number of datas in a database table.now i need to query that table so many times,so to improve the performance i thought i can retrieve the datas and put them in a datastructure so that the system need not query the database again and again.the table structure has two fields.one number and the other string.the numbers are not unique,and i need to have these numbers ans strings in the single datastructure.i saw that all the util datastructures have their own indexes and so they do not allow me to enter my numbers and strings from the table in the same datastructure.which structure will allow the flexibility that i need,or is there any other way to do it.please reply soon,bye thiyagu.

Answer 1

Not exactly sure what you're looking for in terms of a data structure... but I'll just give you what I think the simplest solution is to your problem.
Define a new object (i.e. MyData) which has variables, theNumber (an int or float or whatever yer number is) and theString. Then, all you need to do is query your database, create new MyData objects for each record, and put them into an ArrayList.
public class MyData {
private int theNumber;
private String theString;
public MyData(int number, String str) {
theNumber = number;
theString = str;
public int getNumber() {
return theNumber;
public String getString() {
return theString;
Thats my solution...