[villalandron]

Hello!

I just started a beginner's class for JAVA and the book doesn't explain much. My first assignment asks me to write my first JAVA program. I used notepad and saved it as MyFirstProgram.java. It then tells me to go to the operating system's command prompt and change my current directory or folder to the one that contains the JAVA program I just created. Then asks me to compile the program by typing javac MyFirstProgram.java. It tells me that javac is not recognized as an internal or external command, operable program or batch.

I have MyFirstProgram.java saved in my desktop and what appears on the command prompt is: C:\Users\Jay>javac MyFirstProgram.java

What am I doing wrong? any help for a noob will be appreciatted. Thank You!

[mostyfriedman]

do you have the the java virtual machine installed on your computer?

[BigAnt]

If you installed the java compiler and such from sun you may have to modify the class path to recognize the commands without typing them out fully each time ie javac instead of c://programfiles/myjavalocal/javac.exe.

[villalandron]

mostyfriedman, on 24 Jan, 2009 - 09:02 AM, said:

do you have the the java virtual machine installed on your computer?

Do I need to have the Java Virtual Machine or will it conflict with JDK?

BigAnt, on 24 Jan, 2009 - 09:22 AM, said:

If you installed the java compiler and such from sun you may have to modify the class path to recognize the commands without typing them out fully each time ie javac instead of c://programfiles/myjavalocal/javac.exe.

I'm sorry but, I'm a very beginner. How do I modify the class path?

[markhazlett9]

villalandron, on 24 Jan, 2009 - 10:56 AM, said:

mostyfriedman, on 24 Jan, 2009 - 09:02 AM, said:

do you have the the java virtual machine installed on your computer?

Do I need to have the Java Virtual Machine or will it conflict with JDK?

BigAnt, on 24 Jan, 2009 - 09:22 AM, said:

If you installed the java compiler and such from sun you may have to modify the class path to recognize the commands without typing them out fully each time ie javac instead of c://programfiles/myjavalocal/javac.exe.

I'm sorry but, I'm a very beginner. How do I modify the class path?

The class path in windows can be modified by right clicking on my computer and clicking properties, then click on advanced and environment variables. Then in the bottom square you will need to find PATH and add ; and then the path to the files. This is of course on windows XP

[villalandron]

markhazlett9, on 24 Jan, 2009 - 10:58 AM, said:

villalandron, on 24 Jan, 2009 - 10:56 AM, said:

mostyfriedman, on 24 Jan, 2009 - 09:02 AM, said:

do you have the the java virtual machine installed on your computer?

Do I need to have the Java Virtual Machine or will it conflict with JDK?

BigAnt, on 24 Jan, 2009 - 09:22 AM, said:

If you installed the java compiler and such from sun you may have to modify the class path to recognize the commands without typing them out fully each time ie javac instead of c://programfiles/myjavalocal/javac.exe.

I'm sorry but, I'm a very beginner. How do I modify the class path?

The class path in windows can be modified by right clicking on my computer and clicking properties, then click on advanced and environment variables. Then in the bottom square you will need to find PATH and add ; and then the path to the files. This is of course on windows XP

I hope I am not being too much of a pain in the butt. I have vista but figured out how to modify. I don't think I am doing this right though. Here is what I did. I created a new path and named it path2, the value that I put is as follows: C://programfiles/java/javac.exe. Still not working. Any ideas? Thank you in advance.

[BigAnt]

add to the existing path. Do this by clicking on the path variable and clicking edit, then go to the end and add your java bin directory to the list.

ie if your path to your java bin was: C:\Program Files\Java\jdk1.6.0_02\bin This is what you would add to the end of the path, preceded by a semicolon.

[skyhawk133]

Edited thread title to reflect content.

[markhazlett9]

villalandron, on 24 Jan, 2009 - 11:10 AM, said:

markhazlett9, on 24 Jan, 2009 - 10:58 AM, said:

villalandron, on 24 Jan, 2009 - 10:56 AM, said:

mostyfriedman, on 24 Jan, 2009 - 09:02 AM, said:

do you have the the java virtual machine installed on your computer?

Do I need to have the Java Virtual Machine or will it conflict with JDK?

BigAnt, on 24 Jan, 2009 - 09:22 AM, said:

If you installed the java compiler and such from sun you may have to modify the class path to recognize the commands without typing them out fully each time ie javac instead of c://programfiles/myjavalocal/javac.exe.

I'm sorry but, I'm a very beginner. How do I modify the class path?

The class path in windows can be modified by right clicking on my computer and clicking properties, then click on advanced and environment variables. Then in the bottom square you will need to find PATH and add ; and then the path to the files. This is of course on windows XP

I hope I am not being too much of a pain in the butt. I have vista but figured out how to modify. I don't think I am doing this right though. Here is what I did. I created a new path and named it path2, the value that I put is as follows: C://programfiles/java/javac.exe. Still not working. Any ideas? Thank you in advance.

My bad, sorry couldn't help you there, haven't done too much work on vista....

[superchiku]

right click on my computer go to properties then advanced then enviroment variables in that u ll have the variable named path...
append at the end od that path variable.the full path where ur javac and java is

[villalandron]

BigAnt, on 24 Jan, 2009 - 12:12 PM, said:

add to the existing path. Do this by clicking on the path variable and clicking edit, then go to the end and add your java bin directory to the list.

ie if your path to your java bin was: C:\Program Files\Java\jdk1.6.0_02\bin This is what you would add to the end of the path, preceded by a semicolon.

I think I edited the path properly because after I type
javac MyFirstProgram.java it pauses for a while and then it comes back to C:\Users\Jay. After that, I am trying to do things by my book, it tells me to type java MyFirstProgram and I should be able to see Hello World! display. Instead, I get Exeption in thread 'main' java.lang.NoClassFound Error: MyFirstProgram
Thanks for any help

[BigAnt]

Does this class have a main method?

[skailey]

Hello... I have made sure I have jdk1.6.0_18 installed and my Path is correct, yet... when I try to use just javac... I get the "javac is not recognized as an internal or external command" message. I am not sure what else to do... any advice would be appreciated.

Thanks!

[erik.price]

This thread is almost a year old!

You should have just created your own

[Dogstopper]

skailey, on 21 Jan, 2010 - 05:11 PM, said:

Hello... I have made sure I have jdk1.6.0_18 installed and my Path is correct, yet... when I try to use just javac... I get the "javac is not recognized as an internal or external command" message. I am not sure what else to do... any advice would be appreciated.

Thanks!

Mind showing us your path?