Please help me with two Java problems

Question

Hello,
I have 2 Java problems to work on and wondered if someone can help please?
1. I've created an array, but I have to now create a text file and write a program to read the array from the file. I have no idea where to start the program!
2.public class SumExample1 {
/* To determine if a number lies between 1 and 1000
* @param args the command line arguments
public static void main(String[] args) {
int num;
System.out.print("Enter a number: ");
num = TextIO.getInt();
if ((num >=1) && (num<=1000))
System.out.println("OK");
else
System.out.println ("Not OK");
Ive used a GUI to create some fields and buttons to press. How can I make it perform this little program?
Many thanks,
K

Answer 1

I recommend you read the tutorials on basic (file) IO and Swing (and Event Listeners if you want to make your GUI alive). Perhaps have a look at the Scanner class and BufferedInputStream. That should give you enough to start and write the program yourself. Try working in the command prompt first, should be easier, then once the logic works wrap it in a Swing GUI.
You can find the tutorials here:
http://download.oracle.com/javase/tutorial/
Swing:
http://download.oracle.com/javase/tutorial/uiswing/index.html
Basic IO:
http://download.oracle.com/javase/tutorial/essential/io/index.html
Hope this helps.
PR