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If errors occur, they will be reported on the command-line screen and the program won't be executed.

If your program is named something other than hello , (which it typically would be) substitute the new name for the word hello where it appears twice in the batchfile.

Don't delete the pause command

The pause command causes the command-line window to stay on the screen until you dismiss it by pressing a key on the keyboard. You will need to examine the contents of the window if there are errorswhen you attempt to compile and run your program, so don't delete the pause command.

Translate to other operating systems

The format of the batch file in Listing 1 is a Windows format. If you are using a different operating system, you will need to translate theinformation in Listing 1 into the correct format for your operating system.

A test program

The test program in Listing 2 can be used to confirm that Java is properly installed on your computer and that you can successfully compile and executeJava programs.

Listing 2 . A test program.
class hello { public static void main(String[]args){ System.out.println("Hello World");}//end main }//end class


Copy the code shown in Listing 2 into a text file named hello.java and store in an empty folder somewhere on your disk.

Create a batch file named hello.bat containing the text shown in Listing 1 and store that file in the same folder as the file named hello.java .

Execute the batch file.

If everything is working, a command-line screen should open and display the following text:

Hello World Press any key to continue . . .


If that happens, you have just written, compiled and executed your first Java program.


If that doesn't happen, you need to go back to the installation instructions and see if you can determine why the JDK isn't properly installed.

If you get an error message similar to the following, that probably means that you didn't set the path environment variable correctly.

'javac' is not recognized as an internal or external command, operable program or batch file.

Beyond that, I can't provide much advice in the way of troubleshooting hints.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Jb0110: Java OOP: Programming Fundamentals, Getting Started
  • File: Jb0110.htm
  • Published: 11/16/12

Financial : Although the Connexions site makes it possible for you to download a PDFfile for this module at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should be aware thatsome of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version of the module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.comshowing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, pleasebe aware that it is a copy of a module that is freely available on cnx.org and that it was made and published without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

a perfect square v²+2v+_
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At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
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