How to set JAVA_HOME for Java?
up vote
261
down vote
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I've installed a version of Java. How can we set the $JAVA_HOME
environment variable correctly?
java
add a comment |
up vote
261
down vote
favorite
I've installed a version of Java. How can we set the $JAVA_HOME
environment variable correctly?
java
add a comment |
up vote
261
down vote
favorite
up vote
261
down vote
favorite
I've installed a version of Java. How can we set the $JAVA_HOME
environment variable correctly?
java
I've installed a version of Java. How can we set the $JAVA_HOME
environment variable correctly?
java
java
edited Oct 9 '15 at 11:44
kiri
18.8k1258104
18.8k1258104
asked Aug 13 '12 at 22:31
Gaurav Agarwal
3,253144061
3,253144061
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
up vote
361
down vote
accepted
You can set your JAVA_HOME
in /etc/profile
as Petronilla Escarabajo suggests. But the preferred location for JAVA_HOME
or any system variable is /etc/environment
.
Open /etc/environment
in any text editor like nano
or gedit
and add the following line:
JAVA_HOME="/usr/lib/jvm/open-jdk"
(java path could be different)
Use source
to load the variables, by running this command:
source /etc/environment
Then check the variable, by running this command:
echo $JAVA_HOME
Update
Usually most linux systems source /etc/environment by default. If your system doesn't do that add the following line to ~/.bashrc
(Thanks @pje)
source /etc/environment
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the linesource /etc/environment
to the top of my bash config file~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.
– pje
Mar 11 '17 at 22:31
|
show 9 more comments
up vote
70
down vote
To set JAVA_HOME
environment variable, do the following:
- Launch Terminal by pressing Ctrl+Alt+T on your keyboard.
- Enter the following command:
$gksudo gedit /etc/environment
- Depending on where you installed your Java, you will need to provide the full path. For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle
directory.
Scroll to the end of the file and enter the following:JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
- Save your file and exit gedit.
- Lastly, reload the system PATH with the following command:
$. /etc/environment
The above method will save you the hassle in having to run the commands every time you log in to your computer.
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
Is the addition of theexport
command necessary in the/etc/environment
?
– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
@adeen-s You addedexport
to a line in/etc/environment
and it helped? That file contains variable definitions parsed as=
-delimited name-value pairs; its contents are not executed as commands. (Seeman pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing/etc/environment
to bash's.
/source
builtin), I wouldn't expect that to work.
– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
add a comment |
up vote
31
down vote
If you do not know the path and you only have openJDK installed, you can type
update-alternatives --config java
and you should find the path. To set the variable you can write JAVA_HOME=<PATH>
followed by export JAVA_HOME
. Notice there's no space when declaring the variable. To check if the variable is stored you simply type echo $JAVA_HOME
to verify.
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to runupdate-alternatives --install <link> <name> <target> <priority>
for example:update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
361
down vote
accepted
You can set your JAVA_HOME
in /etc/profile
as Petronilla Escarabajo suggests. But the preferred location for JAVA_HOME
or any system variable is /etc/environment
.
Open /etc/environment
in any text editor like nano
or gedit
and add the following line:
JAVA_HOME="/usr/lib/jvm/open-jdk"
(java path could be different)
Use source
to load the variables, by running this command:
source /etc/environment
Then check the variable, by running this command:
echo $JAVA_HOME
Update
Usually most linux systems source /etc/environment by default. If your system doesn't do that add the following line to ~/.bashrc
(Thanks @pje)
source /etc/environment
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the linesource /etc/environment
to the top of my bash config file~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.
– pje
Mar 11 '17 at 22:31
|
show 9 more comments
up vote
361
down vote
accepted
You can set your JAVA_HOME
in /etc/profile
as Petronilla Escarabajo suggests. But the preferred location for JAVA_HOME
or any system variable is /etc/environment
.
Open /etc/environment
in any text editor like nano
or gedit
and add the following line:
JAVA_HOME="/usr/lib/jvm/open-jdk"
(java path could be different)
Use source
to load the variables, by running this command:
source /etc/environment
Then check the variable, by running this command:
echo $JAVA_HOME
Update
Usually most linux systems source /etc/environment by default. If your system doesn't do that add the following line to ~/.bashrc
(Thanks @pje)
source /etc/environment
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the linesource /etc/environment
to the top of my bash config file~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.
– pje
Mar 11 '17 at 22:31
|
show 9 more comments
up vote
361
down vote
accepted
up vote
361
down vote
accepted
You can set your JAVA_HOME
in /etc/profile
as Petronilla Escarabajo suggests. But the preferred location for JAVA_HOME
or any system variable is /etc/environment
.
Open /etc/environment
in any text editor like nano
or gedit
and add the following line:
JAVA_HOME="/usr/lib/jvm/open-jdk"
(java path could be different)
Use source
to load the variables, by running this command:
source /etc/environment
Then check the variable, by running this command:
echo $JAVA_HOME
Update
Usually most linux systems source /etc/environment by default. If your system doesn't do that add the following line to ~/.bashrc
(Thanks @pje)
source /etc/environment
You can set your JAVA_HOME
in /etc/profile
as Petronilla Escarabajo suggests. But the preferred location for JAVA_HOME
or any system variable is /etc/environment
.
Open /etc/environment
in any text editor like nano
or gedit
and add the following line:
JAVA_HOME="/usr/lib/jvm/open-jdk"
(java path could be different)
Use source
to load the variables, by running this command:
source /etc/environment
Then check the variable, by running this command:
echo $JAVA_HOME
Update
Usually most linux systems source /etc/environment by default. If your system doesn't do that add the following line to ~/.bashrc
(Thanks @pje)
source /etc/environment
edited Apr 24 '17 at 18:00
Zanna
49.2k13123234
49.2k13123234
answered Aug 14 '12 at 2:17
Manula Waidyanatha
5,95211619
5,95211619
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the linesource /etc/environment
to the top of my bash config file~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.
– pje
Mar 11 '17 at 22:31
|
show 9 more comments
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the linesource /etc/environment
to the top of my bash config file~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.
– pje
Mar 11 '17 at 22:31
4
4
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
I'm getting: JDK Required: 'tools.jar' seems to be not in IDEA classpath. Please ensure JAVA_HOME points to JDK rather than JRE.
– anon58192932
Mar 21 '14 at 21:31
2
2
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
@advocate - You should probably post your own question for that. But the clue is in the message; you need to point at a JDK not a JRE.
– David Edwards
Mar 28 '14 at 14:57
2
2
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
When i tried to run Android Studio (that has IntelliJ IDEA as a base), i had an error message very similar to @advocate's: "'tools.jar' seems to be not in Android Studio classpath." After fiddling a lot with JAVA_HOME without success, i decided to take a look at studio.sh, the shellscript that starts Android Studio. As a wild guess, i set JDK_HOME to the same value expected for JAVA_HOME, and voila! It installed without great problems.
– Hilton Fernandes
Mar 7 '15 at 23:20
3
3
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
For those doing software development, don't put your JAVA_HOME in /etc/environment unless you want to reboot everytime you switch JDK versions.
– HDave
Sep 20 '16 at 19:03
5
5
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the line
source /etc/environment
to the top of my bash config file ~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.– pje
Mar 11 '17 at 22:31
As others have pointed out, this doesn't stick between terminal sessions. What I did to address this is just added the line
source /etc/environment
to the top of my bash config file ~/.bashrc
so that it loads all my environment settings on startup. Working for me so far.– pje
Mar 11 '17 at 22:31
|
show 9 more comments
up vote
70
down vote
To set JAVA_HOME
environment variable, do the following:
- Launch Terminal by pressing Ctrl+Alt+T on your keyboard.
- Enter the following command:
$gksudo gedit /etc/environment
- Depending on where you installed your Java, you will need to provide the full path. For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle
directory.
Scroll to the end of the file and enter the following:JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
- Save your file and exit gedit.
- Lastly, reload the system PATH with the following command:
$. /etc/environment
The above method will save you the hassle in having to run the commands every time you log in to your computer.
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
Is the addition of theexport
command necessary in the/etc/environment
?
– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
@adeen-s You addedexport
to a line in/etc/environment
and it helped? That file contains variable definitions parsed as=
-delimited name-value pairs; its contents are not executed as commands. (Seeman pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing/etc/environment
to bash's.
/source
builtin), I wouldn't expect that to work.
– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
add a comment |
up vote
70
down vote
To set JAVA_HOME
environment variable, do the following:
- Launch Terminal by pressing Ctrl+Alt+T on your keyboard.
- Enter the following command:
$gksudo gedit /etc/environment
- Depending on where you installed your Java, you will need to provide the full path. For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle
directory.
Scroll to the end of the file and enter the following:JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
- Save your file and exit gedit.
- Lastly, reload the system PATH with the following command:
$. /etc/environment
The above method will save you the hassle in having to run the commands every time you log in to your computer.
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
Is the addition of theexport
command necessary in the/etc/environment
?
– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
@adeen-s You addedexport
to a line in/etc/environment
and it helped? That file contains variable definitions parsed as=
-delimited name-value pairs; its contents are not executed as commands. (Seeman pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing/etc/environment
to bash's.
/source
builtin), I wouldn't expect that to work.
– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
add a comment |
up vote
70
down vote
up vote
70
down vote
To set JAVA_HOME
environment variable, do the following:
- Launch Terminal by pressing Ctrl+Alt+T on your keyboard.
- Enter the following command:
$gksudo gedit /etc/environment
- Depending on where you installed your Java, you will need to provide the full path. For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle
directory.
Scroll to the end of the file and enter the following:JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
- Save your file and exit gedit.
- Lastly, reload the system PATH with the following command:
$. /etc/environment
The above method will save you the hassle in having to run the commands every time you log in to your computer.
To set JAVA_HOME
environment variable, do the following:
- Launch Terminal by pressing Ctrl+Alt+T on your keyboard.
- Enter the following command:
$gksudo gedit /etc/environment
- Depending on where you installed your Java, you will need to provide the full path. For this example, I installed Oracle JDK 7 in the
/usr/lib/jvm/java-7-oracle
directory.
Scroll to the end of the file and enter the following:JAVA_HOME=/usr/lib/jvm/java-7-oracle
export JAVA_HOME
- Save your file and exit gedit.
- Lastly, reload the system PATH with the following command:
$. /etc/environment
The above method will save you the hassle in having to run the commands every time you log in to your computer.
edited Aug 18 '12 at 21:01
answered Aug 13 '12 at 23:01
Petronilla Escarabajo
1,44877
1,44877
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
Is the addition of theexport
command necessary in the/etc/environment
?
– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
@adeen-s You addedexport
to a line in/etc/environment
and it helped? That file contains variable definitions parsed as=
-delimited name-value pairs; its contents are not executed as commands. (Seeman pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing/etc/environment
to bash's.
/source
builtin), I wouldn't expect that to work.
– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
add a comment |
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
Is the addition of theexport
command necessary in the/etc/environment
?
– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
@adeen-s You addedexport
to a line in/etc/environment
and it helped? That file contains variable definitions parsed as=
-delimited name-value pairs; its contents are not executed as commands. (Seeman pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing/etc/environment
to bash's.
/source
builtin), I wouldn't expect that to work.
– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
5
5
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36
1
1
Is the addition of the
export
command necessary in the /etc/environment
?– pkaramol
Nov 23 '16 at 10:01
Is the addition of the
export
command necessary in the /etc/environment
?– pkaramol
Nov 23 '16 at 10:01
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
@pkaramol I've had to add export JAVA_HOME on 16.04LTS to make it load at startup.
– adeen-s
Jan 20 '17 at 6:20
3
3
@adeen-s You added
export
to a line in /etc/environment
and it helped? That file contains variable definitions parsed as =
-delimited name-value pairs; its contents are not executed as commands. (See man pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing /etc/environment
to bash's .
/source
builtin), I wouldn't expect that to work.– Eliah Kagan
Aug 17 '17 at 16:02
@adeen-s You added
export
to a line in /etc/environment
and it helped? That file contains variable definitions parsed as =
-delimited name-value pairs; its contents are not executed as commands. (See man pam_env
.) So unless you're separately treating the file as though it were a script (such as by passing /etc/environment
to bash's .
/source
builtin), I wouldn't expect that to work.– Eliah Kagan
Aug 17 '17 at 16:02
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
> How does . /etc/environment work? -- . (dot) loads commands from a file askubuntu.com/a/232938/189965
– Roman Bekkiev
Sep 22 at 7:32
add a comment |
up vote
31
down vote
If you do not know the path and you only have openJDK installed, you can type
update-alternatives --config java
and you should find the path. To set the variable you can write JAVA_HOME=<PATH>
followed by export JAVA_HOME
. Notice there's no space when declaring the variable. To check if the variable is stored you simply type echo $JAVA_HOME
to verify.
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to runupdate-alternatives --install <link> <name> <target> <priority>
for example:update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
add a comment |
up vote
31
down vote
If you do not know the path and you only have openJDK installed, you can type
update-alternatives --config java
and you should find the path. To set the variable you can write JAVA_HOME=<PATH>
followed by export JAVA_HOME
. Notice there's no space when declaring the variable. To check if the variable is stored you simply type echo $JAVA_HOME
to verify.
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to runupdate-alternatives --install <link> <name> <target> <priority>
for example:update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
add a comment |
up vote
31
down vote
up vote
31
down vote
If you do not know the path and you only have openJDK installed, you can type
update-alternatives --config java
and you should find the path. To set the variable you can write JAVA_HOME=<PATH>
followed by export JAVA_HOME
. Notice there's no space when declaring the variable. To check if the variable is stored you simply type echo $JAVA_HOME
to verify.
If you do not know the path and you only have openJDK installed, you can type
update-alternatives --config java
and you should find the path. To set the variable you can write JAVA_HOME=<PATH>
followed by export JAVA_HOME
. Notice there's no space when declaring the variable. To check if the variable is stored you simply type echo $JAVA_HOME
to verify.
answered Aug 18 '12 at 21:29
Erro
65478
65478
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to runupdate-alternatives --install <link> <name> <target> <priority>
for example:update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
add a comment |
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to runupdate-alternatives --install <link> <name> <target> <priority>
for example:update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
This seems like it would be static. If I remove openjdk-7 and install openjdk-9, won't the JAVA_HOME then point to the wrong place? How can it be made dynamic?
– DavidJ
Jul 20 '16 at 18:49
3
3
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
By you manually changing it. Once again, YOU are the way it becomes dynamic....
– HDave
Sep 20 '16 at 19:04
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
What @HDave means is that In certain cases, you may want JAVA_HOME to point to a specific java version, so making the update of JAVA_HOME dynamic may not be what you want.
– Maciej
Oct 9 '16 at 15:31
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
i like this answer. I tested with echo and see my path. However, I am confused why I am still getting JAVA_HOME environment variable is not set when I run mvn -version
– Winnemucca
Apr 11 '17 at 22:19
1
1
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to run
update-alternatives --install <link> <name> <target> <priority>
for example: update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
I wrote this answer back when I was more ignorant. Setting the variable as described will only affect your current terminal session, and will not be persisted. The correct way is to run
update-alternatives --install <link> <name> <target> <priority>
for example: update-alternatives --install /usr/bin/java java /usr/lib/jvm/default-runtime/bin/java 1
– Erro
May 14 '17 at 12:26
add a comment |
protected by Community♦ Mar 8 '15 at 7:48
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