Summary

In this chapter, you saw that Java classes consist of members called fields and methods. An object is an instance of a Java class. There are three styles of comment: a single-line comment (//), a multiline comment (/* */), and a Javadoc comment (/** */).

Java begins program execution with a main() method. The most common signature for this method run from the command line is public static void main(String[] args). Arguments are passed in after the class name, as in java NameOfClass firstArgument. Arguments are indexed starting with 0.

Java code is organized into folders called packages. To reference classes in other packages, you use an import statement. A wildcard ending an import statement means you want to import all classes in that package. It does not include packages that are inside that one. java.lang is a special package that does not need to be imported.

Constructors create Java objects. A constructor is a method matching the class name and omitting the return type. When...