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As of November 2012, you will find installation instructions at (External Link) .
I strongly recommend that you read the instructions and pay particular attention to theinformation having to do with setting the path environment variable.
A word of caution
If you happen to be running Windows Vista or Windows 7, you may need to use something like the following when updating the PATH Environment Variable
... ;C:\Program Files (x86)\Java\jdk1.6.0_26\bin
in place of
... ;C:\Program Files\Java\jdk1.7.0\bin
as shown in the installation instructions.
I don't have any experience with any Linux version. Therefore, I don't have any hints to offer there.
It is very difficult to program in Java without access to the documentation for the JDK.
Several different types of Java documentation are available online at (External Link) .
Specific documentation for classes, methods, etc., is available online at (External Link) .
It is also possible to download the documentation and install it locally if you have room on your disk. The download links for JDK 6 and JDK 7 documentationare also shown on the page at (External Link) .
You may also want to search for and use the documentation for the latest version of the JDK.
There are a variety of ways to compile and run Java code. The way that I will describe here is the most basic and, in my opinion, the most reliable. These instructionsapply to a Windows operating system. If you are using a different operating system, you will need to translate the instructions to your operating system.
Begin by using your text editor to write your Java program into one or more text files, each with an extension of.java. (Files of this type are often referred to as source code files.) Save the source code files in an empty folder somewhere on your disk. Make sure that thename of the class containing the main method (which you will learn about in a future module) matches the name of the file in which that class is contained (except for the extension of .java on the file name, which does not appear in the class name) .
Use your text editor to create a batch file (or whatever the equivalent is for your operating system) containing the text shown in Listing 1 (with the modifications discussed below) and store it in the same folder as your Java source code files..
Then execute the batch file, which in turn will execute the program if there are no compilation errors.
| Listing 1 . Windows batch file. |
|---|
echo off
clsdel *.class
javac -cp .; hello.javajava -cp .; hello
pause |
Comments regarding the batch file
The commands in the batch file of Listing 1 will
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