How to include jar files with java file and compile in command prompt

Posted on

Problem :

I have 3 jar files and a .java file that depends on these jar files. How do I compile the .java file with these jar files using a command prompt?

Solution :

You can include your jar files in the “javac” command using the “-cp” option.

javac -cp ".:/home/path/mail.jar:/home/path/servlet.jar;"

Instead of “-cp” you could also use “-classpath”

javac -classpath ".:/home/path/mail.jar:/home/path/servlet.jar:"

You could including the jars every time you compile by setting the environment variable “CLASSPATH” correctly. The environment variable will store the path where the jars and classes that needs to be used for compiling/executing any java file. You will not have to include the jars individually every time you compile you file.

Different machines have different methods to set the classpath as an environment variable.
The commands for Windows, Linux, etc are different.

You can find more details in this blog.

Please try on Linux

javac -cp jarfile source file 


javac  -cp .:/jars/* com/template/*.java

Syntax will work on windows dos command:

javac -cp ".;first.jar;second.jar;third.jar"

The followings are steps,

  1. Copy all jars and your .java file in a same folder (It will be easy to mention file names instead of mentioning long path. Though you can keep jar and .java in separate folders).

  2. To compile,

    javac -cp .:<file_1_name>.jar:<file_2_name>.jar <prog_name>.java
  3. To execute,

    java -cp .:<file_1_name>.jar:<file_2_name>.jar <prog_name>

I hope this helps!

Try to add all dependency jar files to your class path through environment variable settings or use the below steps:

  1. Open command prompt.
  2. Change directory to the location of you java
    file that you would like compile.
  3. Set the classpath for your dependency jar files as shown below:

    set classpath=C:Userssarath_sivanDesktopjarsservlet-api.jar; C:Userssarath_sivanDesktopjarsspring-jdbc-3.0.2.RELEASE; C:Userssarath_sivanDesktopjarsspring-aop-3.0.2.RELEASE;

  4. Now, you may compile your java file. (command: javac

Hope this will resolve your dependency issue.

This will create .class file:

javac -classpath "[jarname with specified path]" [java filename]

This will execute class file:

java -cp [jarname with specified path]: [java filename]

Try This.

javac -cp .:jars/jar1:jars/jar2:jars/jar3 com/source/*.java

javac -cp jars/jar1:jars/jar2:jars/jar3

With -cp command we specify the path where to find the additional libraries which are required to compile the class. jar1, jar2 and jar3, available in jars folder are used to compile class.

You need to specify the dependencies in compile time as well as runtime

To compile use this format

javac -cp "*.jar;classfile_path"


javac -cp "ojdbc6.jar;c:programs"

some times making following change works:

java -cp ".;%CLASSPATH%" classfilename 

Note: ON Windows. For linux use $CLASSPATH instead.

/opt/JavaServices/sqlite $ export CLASSPATH=/opt/JarFiles/XXXX.jar:/opt/JarFiles/XXXX.jar:/opt/JavaServices/;javac

Leave a Reply

Your email address will not be published. Required fields are marked *