Lecture 2 Objectives [Oct 26]prev next

OPENING LINE: In the week before their departure to Arrakis, when all the final scurrying about had reached a nearly unbearable frenzy, an old crone came to visit the mother of the boy, Paul. [Dune, Frank Herbert]
 

HAVE READ:

• pp. [2-32] for Oct. 25 lab
• pp. [33-46]

KNOW:

• The basic primitive types for all Java programs (boolean, char, double, float, int)
• The variable as the primitive means of storing data
• The java.lang.String class
• The java.lang.Math class

BE ABLE TO:

• Compute boolean values with simple comparisons (<, <=, ==, >, >=) and operations (&, |, ^)
• Compute over String objects (+) and make invocations on String objects (length)
• Understand error inherent in computations for int, float, and double types
• Use System.out.println() to report information to the user via console output

DAILY QUESTION:

• Given the DictionaryLetter question below, which method in the String class on page 39 could help? Explain how (or just write the program).

Sample Exam Question: Hypotenuse

Write a Java program to compute and print the hypotenuse for the right triangle with short sides 5 and 7. Confirm the result with manual computation.

Go through all the steps in the design recipe in the development of your program.
 

Sample Exam Question: DivisibleBy5

Write a Java program to determine if a String (containing only digits) represents a number divisible by 5.

Go through all the steps in the design recipe in the development of your program.
 

Sample Exam Question: DictionaryLetter

Write a Java program that determines the letter to be used ('A' ... 'Z') in the dictionary where a word, represented by a String, would be placed.

Go through all the steps in the design recipe in the development of your program. Given what you know now about Java programs, are you satisfied with your program? Hint: Try it on words "alabaster" and then "Alabama".