Organizing Related Classes into Packages

• Package: Set of related classes
• To put classes in a package, you must place a line

  package packageName;

  as the first instruction in the source file containing the classes
• Package name consists of one or more identifiers separated by periods
• For example, to put the Financial class introduced into a package named com.horstmann.bigjava, the Financial.java file must start as follows:

  package com.horstmann.bigjava;
  
  public class Financial
  {
     . . .
  }

• Default package has no name, no package statement