Java Reference
In-Depth Information
CHAPTER
2
ELEMENTARY
P
ROGRAMMING
Objectives
To write Java programs to perform simple computations (§2.2).
■
To obtain input from the console using the
Scanner
class (§2.3).
■
To use identifiers to name variables, constants, methods, and classes (§2.4).
■
To use variables to store data (§§2.5-2.6).
■
To program with assignment statements and assignment expressions (§2.6).
■
To use constants to store permanent data (§2.7).
■
To name classes, methods, variables, and constants by following their
naming conventions (§2.8).
■
To explore Java numeric primitive data types:
byte
,
short
,
int
,
long
,
float
, and
double
(§2.9.1).
■
To perform operations using operators
+
,
-
,
*
,
/
, and
%
(§2.9.2).
■
To perform exponent operations using
Math.pow(a, b)
(§2.9.3).
■
To write integer literals, floating-point literals, and literals in scientific
notation (§2.10).
■
To write and evaluate numeric expressions (§2.11).
■
To obtain the current system time using
System.currentTimeMillis()
(§2.12).
■
To use augmented assignment operators (§2.13).
■
To distinguish between postincrement and preincrement and between
postdecrement and predecrement (§2.14).
■
To cast the value of one type to another type (§2.15).
■
To describe the software development process and apply it to develop the
loan payment program (§2.16).
■
To represent characters using the
char
type (§2.17).
■
To represent a string using the
String
type (§2.18).
■
To obtain input using the
JOptionPane
input dialog boxes (§2.19).
■
