AP Computer Science

Chapter 2 Notes-Set 2

Strings, Variables and Assignment, and Primitive Data Types

Strings

                                                                        Output and Notes

Escape Sequences

                                                                                Output and Notes

Variables

                                                                                Output and Notes

Variable Assignment

                                                                        Output and Notes

Constants

Primitive Data Types

There are exactly eight primitive data types in Java

Four of them represent integers:

• byte, short, int, long

Two of them represent floating point numbers:

• float, double

One of them represents characters:

• char

And one of them represents boolean values:

• boolean

Only three are in the AP subset: int, double, and boolean

Arithmetic Expressions

Addition                        +

Subtraction                        -

Multiplication                *

Division                        /

Remainder                        %

                                                                        Output and Notes:

Data Conversions

result = (double) total / count

Enumerated Types

                                                                        Output and Notes