Start of Tutorial > Start of Trail > Start of Lesson

Search Feedback Form

Questions and Exercises: Variables

Questions

1. Which of the following are valid variable names?

   int
   anInt
   i
   i1
   1
   thing1
   1thing
   ONE-HUNDRED
   ONE_HUNDRED
   something2do
   

2. Answer the following questions about the BasicsDemo program.
   1. What is the name of each variable declared in the program? Remember that method parameters are also variables.
   2. What is the data type of each variable?
   3. What is the scope of each variable?

Exercises

1. Modify the MaxVariablesDemo program so that aBoolean has a different value.
2. Rewrite the MaxVariablesDemo program to display the minimum value of each integer data type. You can guess what the names of these variables are or you can look them up in the API documentation.
3. Can you guess the name of a method in the Character class that you can use instead of isUpperCase to determine the capitalization of a character? Modify the MaxVariablesDemo program to use that method instead of isUpperCase.

Start of Tutorial > Start of Trail > Start of Lesson

Search Feedback Form

Copyright 1995-2002 Sun Microsystems, Inc. All rights reserved.