• Provides separate namespace for types
  • Fully qualified name includes package name
    • java.lang.String
    • java.io.BufferedReader
    • com.turingscraft.engine.TestManager
    • java.util.Date
    • java.sql.Date
• By convention, 'reverse' url spec is used.

Classpaths

• Starting root of package tree hierarchy
• Often obtained from the environment variable CLASSPATH
• Can also be specified on java/javac command line
• Includes current directory (.)

package statement

• introduces compilation unit (source file) as member of the specified package

  package com.turingscraft.engine;
  		

import statement

• Eliminates need for package name qualification

  import com.turingscraft.engine.*;	// imports entire package
  import java.util.Vector;				// imports specified class only
  	

• package java.lang is implicitly imported by the compiler