CIS 67 Lab 1

 
  • 1. Type in the classes on p. 25 and 26 and save them as separate .java files. Figure NameInStars may have a syntax error -- if so, correct it.
  • 2. Build the project and run it.
  • 3. Create a project Coins.
  • 4.  Download and store the file CoinChanger.java
  • 5.  Download and store the file ChangeCoinsApp.java in the project.
  • 6. Compile and run the program.
  • 7. Make the two changes below (through 8) and then compile and run the program again.
  •  Add another data field for half-dollars. Process this data field in class CoinChanger like the others. Your modified application should read in half-dollars.
  • 8. Add a boolean method isSuperSaver() to class CoinChanger that returns true if the coin collection is worth more than $5. Apply this method in class ChangeCoinsApp and append the string "Congratulations, you are a super saver" to the end of String message if the user is a super saver. Hint: the method
  •  
  • public boolean isPostive() {
  •     return sqrt(x) > 1.0;
  • }
  •  
  • returns true if the square root of x is greater than one. Your new method should look similar to this one.
  • 9. Assignments for next time: Projects #4 and 5, p. 103.  Follow the software development method and place the documentation in a long comment before each program. Hint: You can do these projects using a single application class with a main method (as you would in C) but it would be better to write a class Rectangle and a class Yard for #6 (see Section 3.5 for an example) and a class Fraction for #6 with methods that perform the required computations.

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