CS1010 -- Week 3 Lecture 1: Numbers/Simple I/O

Winter 2005-2006

Topics

Primitive types

Primitive types: byte, short, int, long, float, double, boolean, and char
Assignment statement
Reference vs. primitive types

Arithmetic expressions

Arithmetic operators: +, -, *, /, %
Integer division
Binary/unary operations
Precedence rules: (), unary, (*, /, %), (+, -)
Typecasting
Numeric promotion: implicit type casting
Assignment conversion
Shorthand assignment operations: *=, /=, +=, -=, and %=

Standard input/output

Type conversion via wrapper classes: int num = Integer.parseInt("14");
Input buffer: System.in

Standard/console input:

java.util.Scanner scanner = new java.util.Scanner(System.in);
int age = scanner.nextInt();

  Output buffer: System.out
  Standard output: System.out.println("Stuff");

Math class

Math class with class methods

Last Updated: Thursday, 01-Jan-2015 13:28:56 CST