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Java environment The first piece of software you have to install is a Java environment. In this tutorial, we will use Sun's JavaTM2 Software Development Kit (SDK), but you can use Java SDK provided by other manufacturers as well. Here are the steps to install your Java environment Java SE Development Kit 1. download page. 2. Download a SDK Setting Up Your Java Environment After installing the Java SDK your only remaining task is to set the value for JAVA_HOME and update the PATH environment variable. JAVA_HOME must point to the directory where you installed the SDK and PATH must point to the bin subdirectory of the SDK. Here are examples for the Unix and Windows platforms: Unix platforms Assuming that you installed the SDK in the /usr/local/jdk1.3.1 directory, you should enter the following: bash>export JAVA_HOME=/usr/local/jdk1.3.1 or tcsh>setenv JAVA_HOME /usr/local/jdk1.3.1 You then have to update your PATH variable by appending /usr/local/jdk1.3.1/bin. If JAVA_HOME has been properly set, you can proceed as follows: bash>export PATH=${PATH}:${JAVA_HOME}/bin or tcsh>setenv PATH ${PATH}:${JAVA_HOME}/bin Environment variables must be correctly set at all times. It is common practice to insert these commands in your shell start file (.bashrc, .cshrc, ...). Windows platforms Assuming that you installed the SDK in the C:\jdk1.3.1 directory, you can issue the following command: C:>set JAVA_HOME=C:\jdk1.3.1 You then have to update your PATH variable by appending C:\jdk1.3.1\bin. If JAVA_HOME has been properly set, you can enter the following: C:>set PATH=%PATH%;%JAVA_HOME%\bin To update the path permanently, do the following depending upon your Windows version: Windows 95 or 98 You must insert this command in the AUTOEXEC.BAT file. Windows Me Go to the Start Menu, then choose Programs, Accessories, System Tools and System Information. A window titled "Microsoft Help and Support" should appear. Select the Tools menu, and choose the System Configuration Utility. Go to the Environment tab where you can edit the PATH variable. Append the value ;C:\jdk1.3.1\bin. Once you have changed and saved the value, you will be prompted to reboot. Windows NT Go to the Start Menu, then choose Settings, Control Panel and select System. Select the Environment tab and look User Variables and System Variables for PATH. Then edit the value and append the value ;C:\jdk1.3.1\bin. Windows 2000 Go to the Start Menu, then choose Settings, Control Panel and select the System icon. Select the Advanced tab and then click on the Environment Variables button and then edit the System Variables entries for PATH by appending ;C:\jdk1.3.1\bin. Windows XP Go to the Start Menu, then double click on System. In the System Control Panel select the Advanced tab and push the Environment Variables button. Now, you can look for the PATH to edit. Append the value ;C:\jdk1.3.1\bin. Once you have changed and saved the value, you will be prompted to reboot.