javac : command not found

Question

I have installed java in my CentOS release 5.5 machine using the command yum install java. But I am unable to compile a class using javac.

Do I need to install any other package?

I have tried to locate the javac executable but i am unable to locate it.

/usr/bin/java is linked as follows:
/usr/bin/java -> /etc/alternatives/java
/etc/alternatives/java -> /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/bin/java

I have seen the following output by yum list installed |grep java:

java-1.6.0-openjdk.x86_64              1:1.6.0.0-1.16.b17.el5          installed
tzdata-java.x86_64                     2011b-1.el5                     installed

Exobiology

It looks like your solution is to use yum to install java-1.6.0-openjdk-devel.x86_64 – Sanfred

Answer 1

You installed the Java Runtime Environment (JRE) only, which does not provide javac. For javac, you have to install the OpenJDK Development Environment. You can install java-devel or java-11-devel, which both include javac.

By the way: you can find out which package provides javac with a yum search, e.g.

su -c 'yum provides javac'

on more recent releases of CentOS e.g. 6 the command changes to

su -c 'yum provides */javac'

Cyrie

yes, i am sure. just look at the java-1.6.0-openjdk.x86_64 package information (scroll to the "Files" section) and see that there is no javac in that package. and then look at the OpenJDK Development Environment package. – Cyrie

Thanks for your help.. I have used "yum install java-1.6.0-openjdk-devel.x86_64" – Exobiology

On Fedora 20 yum provides javac outputs "No matches found". – Sundae

but he installed 'openjdk', right? JDK means java development kit – Baywood

If you had an older javac installed, you may need to sudo alternatives --config javac to make javac point to the newly installed version. – Garv

Answer 2

Worked for me with this command:

yum install java-devel

Putsch

But that installs the obsolete JDK 6. Why doesn't it install JDK 8? "yum install java" does install JRE 8. – Whoreson

You can grep the output of "yum list" to find the version of java you want, then do "yum install <package>". For me, it was "yum install java-1.7.0-openjdk-devel.x86_64" – Calliope

For java8 use sudo yum install java-1.8.0-openjdk-devel – Merchant

this should be the answer. – Bode

Other java installs dint provide javac wasted 2 hrs until i stumbled up on this – Engleman

Answer 3

Use the following sudo command:

sudo yum install java-1.6.0-openjdk-devel

Operetta

Answer 4

I don't know exactly what yum install java will actually install. But to check for javac existence do:

> updatedb
> locate javac

preferably as root. If it's not there you've probably only installed the Java runtime (JRE) and not the Java Development Kit (JDK). You're best off getting this from the Oracle site: as the Linux repos may be slightly behind with latest versions and also they seem to only supply the open-jdk as opposed to the Oracle/Sun one, which I would prefer given the choice.

Respirable

Answer 5

Install same version javac as your JRE

yum install java-devel

Smalltime

Answer 6

I use Fedora (currently 31)

Even with JDK's installed, I still need to specify JAVAC_HOME in the .bashrc, especially since I have 4 Java versions using sudo alternatives --configure java to switch between them.

To find java location of java selected in alternatives

readlink -f $(which java)

In my case: /usr/java/jdk1.8.0_241-amd64/jre/bin/java

So I set following in .bashrc to:

export JAVA_HOME=/usr/java/jdk1.8.0_241-amd64/jre/bin/java

export JAVAC_HOME=/usr/java/jdk1.8.0_241-amd64/bin/javac

export PATH=$PATH:/usr/java/jdk1.8.0_241-amd64/jre/bin

export PATH=$PATH:/usr/java/jdk1.8.0_241-amd64/bin/

Now javac –version gives: javac 1.8.0_241

This is useful for those who want to use Oracle's version. Just remember to change your .bashrc again if you make a change with java alternatives.

Hinojosa

Answer 7

This worked for me: sudo dnf install java-<version>-devel

Polyethylene

Answer 8

Is the javac executable in a directory that is part of your PATH?

I don't know the CentOS equivalent of the Windows path but if you cd to the java sdk directory and run ./javac does anything happen?

Athanasius

My problem is where the javac executable will be present by default – Exobiology

doesn't centos have the locate command? as suggested by @Richard – Athanasius

I'm sorry, BenCr, I corrected a typo (javajc => javac) but the system only allows to correct at least 6 characters, so I changed something more. On Unix type systems (is CentOS some kind of Unix?) you have to specify ./ to start something in the current directory. Feel free to reedit, if my edits get approved. – Suber

did you accept the wrong answer? if so, please change to the right one so as not to confuse readers. – Cyrie

Answer 9

You have installed the Java Runtime Environment(JRE) but it doesn't contain javac.

So on the terminal get access to the root user sudo -i and enter the password. Type yum install java-devel, hence it will install packages of javac in fedora.

Hermit

Answer 10

Linux Mint 19.3

I installed Java Oracle manually, like this:

$ sudo ln -s /usr/lib/jvm/java-1.8.0_211/bin/javac /usr/bin/javac

Oilcan

Answer 11

for java 8 use sudo yum install java-1.8.0-openjdk-devel

Mu

Answer 12

Make sure you install JDK/JRE first.

follow these steps:

open terminal go to your root dictionary by typing

cd /

you will see Library folder

Now follow this path Library/Java/JVM/bin

Once you get into bin you can see the javac file

Now you need to get the path of this folder for that just write this command

pwd

get the path for your javac.

Outshout

The operating system the OP names is CentOS. – Stealth