I need emergent help~!

Question

Hi.
I am taking Java class now...and I need to turn in these two programs by next tuesday, or I fail this class.
But I don't even know how to start with these programs.
I'm pretty sure that these are really easy programs to do for some of you.
It will be really great if you give me some help here.
Program 1:
You will be able to see the direction for program if you click this link:
http://iboard3.superboard.dreamwiz.com/board.cgi?db=90_Java1&idx=1&page=1
This is program that uses very basic things of fraction.
And this program is supposed to be written creating class and using constructor and tester program for every method. (and of course I don't know what this means)
What is tester program? and how to use it?
Program 2:
part 1: http://iboard3.superboard.dreamwiz.com/board.cgi?db=90_Java1&idx=2&page=1
---> It's a data for the program.
part 2: http://iboard3.superboard.dreamwiz.com/board.cgi?db=90_Java1&idx=3&page=1
This program should be written to accept the data on part1.
And this program should be written by using different type of methods that are used in ATM machine:
EX>
<public methods>
withdraw
deposit
check balance
transfer
<private methods>
log in
log out
Thank you. very much
I appereciate your help.

Answer 1

I guess it should look like this. Of course there is still a lot missing.
class Test {
public static void main(String[] args) {
Fraction fractionOne=new Fraction(1, 4);
Fraction fractionTwo=new Fraction(6, 15);
fractionTwo.add(fractionOne);
System.out.println(fractionTwo.doubleValue());
class Fraction {
private int num, den;
Fraction(int n, int d) {
num=n;
den=d;
void add(Fraction f2) {
int num2=f2.num;
int den2=f2.den;
num=num*den2+num2*den;
den=den*den2;
double doubleValue() {