You are given the main program and the output produced by it. You must write the Coin class, a file named Coin.java which will satisfy the class definition required by CoinTester.java. Be sure to write your Coin.java in the same directory with CoinTester.java
Be sure to write and test your Coin.java in the same directory with CoinTester.java or the CoinTester can't find the Coin class.
javac CoinTester.java (and it will automatically compile the Coin.java for you)
You can even do just ==> javac *.java if there are no other java files in the directory
Look at the main and see how the Coin class is constructed and what methods are called. From those observations, you can deduce the private data members and public methods with their exact naming and data type. Note that when a coin object is created, it's internal head and tail counts are initialized to zero. Each time a coin is .flip()'d that flip increments that coin's heads or tails counts with a 50% each probability. Thus, you must use a Random variable inside your Coin class to get a 50/50 chance of getting a head or tail. Once the flip method decided that a head or tail was rolled, the flip method increments the appropriate counter and then returns "H" or "T". The reset() method starts that coin's counters back at 0.
CoinTester.java & Coin.java
YOU MUST: Coin.java and CoinTester.java files in the same directory. They must be in the same directory or the the Tester can't find the Coin class.
Notice the tester program sends in hard coded seeds of 17 and 13 for coins 1 and 2 respectively. As a result your (and my) program should give the same output every time we run them. However, if you are running a very old version of the JVM or are running a Mac which does Java its own way (older Macs) you may get differing results on your local machine. I am testing everyone's code on the same version of Java when the script grader tests them so if you wrote it correctly you will match the grading script.
Look at these slides on Random Numbers
Your leader will explain the task and begin suggesting what you do each step of the way by looking at each call made by the tester program and seeing exactly what that call returns. Your leader will then ask you to write that constructor or method in the Coin.java file. Your leader will walk around and give as much help as needed for you to get it working. Just do it one step at a time. Write ONE method at a time then compile Coin.java and test with the Tester.
Here is the output of a sample run of CoinTester.java
