Computer Science 202
Introduction to Programming

Fall 2012, The College of Saint Rose

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Agenda

• Announcements
• Lecture assignment 3 recap
• The programming process
• More console output
• Keyboard input, variables, string concatenation
• In-class exercise

  You may do this by yourself or with a partner. Write a Java program in BlueJ similar to the HelloYou example that prompts its user for a word, then uses the word entered, prints some meaningful message. The structure of the program should be very similar to HelloYou, but be sure to use meaningful names for your variables and a meaningful class name. It does not need to be complex. Something along the lines of "What is your favorite color?" and if you type in "blue", it would respond, "I like blue, too!". Also be sure to include your name(s) in the comment at the top of the program.

  Submit just the Java file in Blackboard under the "Lecture Assignments" category to the "Lecture 4 In-Class Exercise" item. This will earn you 5 lecture assignment points.

• Working with numbers

Lecture Assignment 4

Due at the start of class, Tuesday, September 11.

Please submit answers to these questions in Blackboard by the start of class. We will discuss these questions at the start of class, so no late submissions are accepted.

1. Consider the following names that a programmer is considering for use as variable names in a Java program. For each one, indicate whether it is a valid Java identifier. If it is valid, does it conform to the Java naming convention for variables? For all names that are either invalid or do not conform to the naming convention, suggest a similar name that would be appropriate to use instead. (5 points)

   KNIGHT
   202assignments
   FavoriteColor
   darth vader
   BugsBunny!
   WHEN_IS_LUNCH?
   gotCash$$
   jeter2
   little Red Wagon
   school_name
   

2. Write a simpler Java statement that is equivalent to the following: (2 points)

     System.out.print("Hi " + "there.\n");
     System.out.print("I really, really like ");
     System.out.println("this class!");
   

Examples

• Seuss
• HelloYou
• Rectangle