arrays

[Donald Wynn]

How do I declare a array and how do I store data in that array.

[John Smith]

        int arraySize = 10;
        int[] myFirstArray = new int[arraySize];
        for (int i = 0; i < arraySize; i++) {
            myFirstArray[i] = i;
            System.out.println(myFirstArray[i]);
        }

You may also want to consider dynamic array, -- look into ArrayList class. Or, you may realize that what you need is not really an array, but something else, such as a Map or a Set.
Eugene.

[Donald Wynn]

How does a map and set work?

[Thomas Paul]

Check the JavaRanch newsletter for the four part series on Collections and Maps.