bash: javac: command not found???

MRAB54 · 11-12-2004, 12:57 AM

I'm new to linux but I use linux a little at school and by connecting through a shell at home. Anyways, I just installed linux a little while ago and I opened a shell and tried to compile some java code by going to the directory of the code and typing "javac someCode.java" like I do at school but it says the command is not found.

I previously had installed the java runtime environment and I just went to go and try to install the java development kit but it says it was already installed.

Is there some sort of path I need to set for the shell to look for the java compiler? Thanks in advance.

Edit:
I have added aliases to my .cshrc file at school and I just found a bashrc file and csh.cshrc file in the /etc folder. Sorry, I'm really new to all of this. Anyways, I'm geussing I have to edit the bash file? Can anyone point me to a good tutorial of scripting for these files???

linux_terror · 11-12-2004, 01:10 AM

#updatedb
#locate javac
execute javac by typing in the full path to it such as if its in /usr/local

#/usr/local/javac somecode.java

optionally add it to your search path. Most likely you can copy or link the binary javac to someplace like /usr/bin or /usr/local/bin and it will be in your path for future use.

linux_terror

IBall · 11-12-2004, 02:09 AM

Edit ~/.bash_profile or ~/.bashrc or ~/.profile (I use .bash_profile).

Add the following lines to whichever file:

Code:

PATH=/path/to/java/bin:$PATH
JAVA_HOME=/path/to/java

export PATH
export JAVA_HOME

where /path/to/java is wherever you installed it (Such as /usr/local/java)

I am not sure, but you may need to set the CLASSPATH as well in order to compilte a java program. This will be /path/to/java/lib. (With the same syntax as above)

When you have added the above lines to .bash_profile, enter the command:

Code:

source .bash_profile

Now you should be able to compile your program using javac.

I hope this helps
--Ian

MRAB54 · 11-12-2004, 03:23 AM

Thanks for the fast reply, I edited the bashrc file like you said, I am not finding a .bash_profile file, and when I ran source bashrc, it says

bash: PATH: command not found
bash: JAVA_HOME: command not found
bash: CLASSPATH: command not found
bash: TMOUT: readonly variable

???

zhangmaike · 11-12-2004, 03:42 PM

Don't put spaces around the equals sign. Like:

Code:

PATH=/path/to/java/bin:$PATH
JAVA_HOME=/path/to/java

export PATH
export JAVA_HOME

Grim Notepad · 04-03-2005, 07:37 PM

I am recieving the same error with the "java command not being found" and "You need to install a VM before ...etc", i can get it to work if i source the ~/.cshrc before trying to run the program, is there any way of making it so that it always works?

lahrach.tdi · 02-18-2015, 08:18 AM

If you receive this error, UNIX cannot find the compiler, javac.
or
javac: Command not found - after installing Java

Here's one way to tell UNIX where to find javac. Suppose you installed the JDK in /usr/local/jdk1.8.0. At the prompt you would type the following command and press Return:

/usr/local/jdk1.8.0/javac hello.java
Note: If you choose this option, each time you compile or run a program, you'll have to precede your javac and java commands with /usr/local/jdk1.8.0/. To avoid this extra typing, you could add this information to your PATH variable. The steps for doing so will vary depending on which shell you are currently running.

Class names, 'hello', are only accepted if annotation processing is explicitly requested

If you receive this error, you forgot to include the .java suffix when compiling the program. Remember, the command is javac hello.java not javac hello.

For more details, consult this lecture "Creating a Hello World application" in this page. http://learnjavaeasy.com/course/lear...8-by-examples/