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about pakages

sampath kumar yanagandla

Joined: Apr 29, 2007
Posts: 13
what is the default package for a java program.

if we mention

it belongs to javaranch package.

what package it belongs to if we dont mention package name.
Abdel Olakara

Joined: Jan 10, 2007
Posts: 6
Hi Sampath,
Default package in java is unnamed package ie,source files did not contain a package statement. It includes all the files in current directory.

-- Abdel Olakara
Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
It's handy to write tiny example programs and maybe even simple homework in the default package, but it causes headaches to use the default package in larger systems. I only use it for quick disposable tests.

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Diego Pedrosa

Joined: Nov 09, 2007
Posts: 8
if you don't specify a package, the .class files will end up in either the same dir as the source (.java) files or in the dir you specified in javac -d option.

using the default package, and the source code is in /java/src
when you compile it with 'javac' the class file will go to /java src (having and MyApp.class in the /java/src dir)

if you compile this with 'javac -d /java/class' the .class file will go to /java/class (now is in /java/src and MyApp.class is in /java/class)

now if you use a package, say 'package javaranch;':
your .class files will end up in a dir named javaranch (that will be either under /java/src or java/class based upon the '-d' compiler option used)
[ November 09, 2007: Message edited by: CoderX ]

SCJP 5.0 (Yeah!! finally...)<br /> <br />There are 10 kinds of people...<br />The ones that understand binary,<br />and the ones that don't. ;P
Jason Shepherd

Joined: Nov 28, 2007
Posts: 1
I created a file as follows: (From the Packages Tutorial in the java homepage

package mygame.shared;

public class Utilities {
// set DEBUG = false and compile to stop debug messages
final static boolean DEBUG = true;

public static void printMsg(String msg) {
if (DEBUG) {

Placed the file in a directory 'myDirectory'

From the command line in the myDirectory folder I run:

From the tutorial, and what you mentioned above I think the resulting Utilites.class file should be placed in a subdirectory of myDirectory name mygame/shared but it is just created in the current directory.
subject: about pakages