1 - Installing the JDK - Java Programming Tutorial

Hi friends, this is my first tutorial for java programming language. This tutorial is for beginner level. In this tutorial I  will show you how to install Java Development Kit (JDK). To Compile and  Run a java program you will need to install JDK in your PC.

At first you need to download JDK. You can find the JDK from the  Oreacle site . To download JDK click here. In this site you can find  Java Platform, Standard Edition table, in this table you will see JRE & JDK. JRE means Java Runtime Environment. JRE is used only to Run the java program. However to develop Java applications and applets, you need the JDK (Java Development Kit), which includes the JRE. After that you need to install the JDK.

 

Update the PATH Environment Variable (Microsoft Windows)

You can run Java applications just fine without setting the PATH environment variable. Or, you can optionally set it as a convenience.

Set the PATH environment variable if you want to be able to conveniently run the executables (javac.exe, java.exe, javadoc.exe, and so on) from any directory without having to type the full path of the command. If you do not set the PATH variable, you need to specify the full path to the executable every time you run it, such as:

C:\Java\jdk1.7.0\bin\javac MyClass.java

The PATH environment variable is a series of directories separated by semicolons (;). Microsoft Windows looks for programs in the PATH directories in order, from left to right. You should have only one bin directory for the JDK in the path at a time (those following the first are ignored), so if one is already present, you can update that particular entry.

The following is an example of a PATH environment variable:

C:\Java\jdk1.7.0_17\bin;C:\Windows\System32\;C:\Windows\;C:\Windows\System32\Wbem

It is useful to set the PATH environment variable permanently so it will persist after rebooting. To make a permanent change to the PATH variable, use the System icon in the Control Panel. The precise procedure varies depending on the version of Windows:

You need to follow this few steps ----

1. From the desktop, right click the Computer icon.
2. Choose Properties from the context menu.
3. Click the Advanced system settings link.
4. Click Environment Variables. In the section System Variables, find the PATH environment variable and select it. Click Edit. If the PATH environment variable does not exist, click New & give the Variable name PATH , Variable value  C:\Program Files\Java\jdk1.7.0_17\bin;
5. In the Edit System Variable (or New System Variable) window, specify the value of the PATH environment variable. Click OK. Close all remaining windows by clicking OK.

Enjoy coding....