Chapter 4: Fundamental Data Types

Primitive Types

• byte, short, int, long (e.g. 10)
• float, double (e.g. 10.50)
• boolean (e.g. true, false)
• char (character, e.g. 'a')

Useful Numbers Tips

• casting, e.g. int dollar = (int) 10.50;
• Math library methods, e.g. Math.round(double), Math.floor(double), etc.

Constants

• Method constant, e.g. final double DIME_VALUE = 0.10;
• Class constant, e.g. public static final double DIME_VALUE = 0.10;
• Tip: use constants instead of magic numbers

Assignment Operator

• int year = 2007;
• year = year + 1;
• year++;
• year--;

Lecture Code

• TestProgram.java