Java Installation and Environment Setting

We are going to learn about how to download , install Java and set Environment setting to make a Java program run.


Installation:

• Download the latest version of  Java from http://java.sun.com.
• Click on Download button to go  to download page and start download the latest version available there. 

• Assume that Java installed in  C:\Program Files\Java\jdk
• If installation is done properly you can see two files  java and javac in C:\Program Files\Java\jdk\bin

Environment Setting:

Now the next step is environment and path setting. There are two ways to accomplish this 

Temporary Path Setting: 

• Open the command prompt 
• Write the command on the command prompt according to the following format                                                 C:\Program Files\Java\jdk\bin
• To check weather path has been set or not, write javac and press ENTER. If the list of options displayed, means that you have successfully completed the steps of path setting. 
• The above procedure is shown in the picture given below: 

The issue with this procedure is that you have to repeat this again and again each time you open a new command prompt window. To avoid this overhead, it is better to set path permanently.

Permanent Path Setting: 

• Write click on My Computer icon and click on Properties. 
• Then select Advanced tab and click on Environment Variables. 
• Now click on new and then in variable name field write path and in variable value field write path of the bin folder i.e C:\Program Files\Java\jdk\bin.

• Press OK button.
• Now open command prompt and write javac, and press Enter key. A list of  option would be displayed. 
• After setting path by this method , you have no need to set path for each new opened command prompt.