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In this chapter, we will learn about the local environment setup of Apache Commons IO and how to set up the path of Commons IO for Windows 2000/XP, Windows 95/98/ME etc. We will also understand about some popular java editors and how to download Commons IO archive.
Local Environment Setup
System Requirements
| JDK | Java SE 2 JDK 1.8 or above |
|---|---|
| Memory | 1 GB RAM (recommended) |
| Disk Space | No minimum requirement |
| Operating System Version | Windows XP or above, Linux |
Verify your Java Installation
First of all, you need to have Java Software Development Kit (SDK) installed on your system. To verify this, execute any of the two commands depending on the platform you are working on.
If the Java installation has been done properly, then it will display the current version and specification of your Java installation. A sample output is given in the following table.
| Platform | Command | Sample Output |
|---|---|---|
| Windows |
Open command console and type −
>java -version
|
java version “11.0.11” 2021-04-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.11+9-LTS-194)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.11+9-LTS-194, mixed mode)
|
| Linux |
Open command terminal and type −
$java -version
|
java version “11.0.11” 2021-04-20 LTS
Open JDK Runtime Environment 18.9 (build 11.0.11+9-LTS-194)
Open JDK 64-Bit Server VM (build 11.0.11+9-LTS-194, mixed mode) |
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We assume the readers of this tutorial have Java SDK version 11.0.11 installed on their system.
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In case you do not have Java SDK, download its current version from www.oracle.com/technetwork/java/javase/downloads/index.html and have it installed.
Set your Java Environment
Set the environment variable JAVA_HOME to point to the base directory location where Java is installed on your machine. For example,
| Sr.No. | Platform & Description |
|---|---|
| 1 |
Windows
Set JAVA_HOME to C:ProgramFilesjavajdk11.0.11 |
| 2 |
Linux
Export JAVA_HOME = /usr/local/java-current |
Append the full path of Java compiler location to the System Path.
| Sr.No. | Platform & Description |
|---|---|
| 1 |
Windows
Append the String “C:Program FilesJavajdk11.0.11bin” to the end of the system variable PATH. |
| 2 |
Linux
Export PATH = $PATH:$JAVA_HOME/bin/ |
Execute the command java -version from the command prompt as explained above.
Popular Java Editors
To write your Java programs, you need a text editor. There are many sophisticated integrated development environment (IDEs) available in the market. But for now, you can consider one of the following −
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Notepad − On Windows machine you can use any simple text editor like Notepad (Recommended for this tutorial), TextPad.
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Netbeans − It is a Java IDE that is open-source and free which can be downloaded from www.netbeans.org/index.html.
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Eclipse − It is also a Java IDE developed by the eclipse open-source community and can be downloaded from www.eclipse.org.
Download Common IO Archive
Download the latest version of Apache Common IO jar file from commons-io-2.11.0-bin.zip. At the time of writing this tutorial, we have downloaded commons-io-2.11.0-bin.zip and copied it into C:>Apache folder.
| OS | Archive name |
|---|---|
| Windows | commons-io-2.11.0-bin.zip |
| Linux | commons-io-2.11.0-bin.tar.gz |
| Mac | commons-io-2.11.0-bin.tar.gz |
Set Apache Common IO Environment
Set the APACHE_HOME environment variable to point to the base directory location where Apache jar is stored on your machine. Assuming, we”ve extracted commons-io-2.11.0-bin.zip in Apache folder on various Operating Systems as follows.
| OS | Output |
|---|---|
| Windows | Set the environment variable APACHE_HOME to C:Apache |
| Linux | export APACHE_HOME=/usr/local/Apache |
| Mac | export APACHE_HOME=/Library/Apache |
Set CLASSPATH Variable
Set the CLASSPATH environment variable to point to the Common IO jar location. Assuming, you have stored commons-io-2.11.0-bin.zip in Apache folder on various Operating Systems as follows.
| OS | Output |
|---|---|
| Windows | Set the environment variable CLASSPATH to %CLASSPATH%;%APACHE_HOME%commons-io-2.11.0.jar;. |
| Linux | export CLASSPATH=$CLASSPATH:$APACHE_HOME/commons-io-2.11.0.jar:. |
| Mac | export CLASSPATH=$CLASSPATH:$APACHE_HOME/commons-io-2.11.0.jar:. |
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