What is the difference between java and javaw?

Everyday is a new learning opportunity. I have been a programmer for more than 5 years now, but I realized sometimes people tend to ignore smaller nice features – which you later repent you should have learned years ago. Here is what I learned today about java/javaw.

The javaw command is identical to java, except that with javaw there is no associated console window. Use javaw when you don’t want a command prompt window to appear. The javaw launcher will, however, display a dialog box with error information if a launch fails for some reason.

Just giving you  a background on why it was useful to me: I was working on a shared machine with my co-workers and I used to leave one of my tools running in the console. This tool was supposed to stay alive all the time to serve its purpose of polling the logged users – but sometimes it used to get killed by some other users (and sometimes myself too) in ignorance. Then when I learned using ‘javaw’ I didnt have to care even if I myself or my co-workers killed the console, the program ran on the background anyways.

You could run your programs as a service anyways – but I am not going to advocate about those ideas in this post today.

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5 Responses to Read XML File In JAVA using DOM – A Simple Tutorial

  1. harry says:

    I need a tutorial on an exact opposite of this excellent article. That is I need to serialize Java Object to XML. Can you help me in that Kushal??? I wud appreciate it a lot.

    Thanks

  2. Jim says:

    Hey Kushal!
    This is very great and helpful, but I got another question about that. If I have an Element which hasn’t any values, I always get a NullpointerException. Do you have an Idea how to fix/catch that?

    Thank you!

  3. Mridula says:

    The advantage in Java is that there it is not necessary to take care of objects which are no longer used. Garbage collector takes care of these objects unlike C/C++ language where because of this issue the program terminates causing OutOfMemoryErrors.

  4. priya says:

    Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory.

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