How to set JAVA_HOME for Java?

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I've installed a version of Java. How can we set the $JAVA_HOME environment variable correctly?

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

add a comment |

up vote
262
down vote

favorite

113

I've installed a version of Java. How can we set the $JAVA_HOME environment variable correctly?

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

add a comment |

up vote
262
down vote

favorite

113

up vote
262
down vote

favorite

113

I've installed a version of Java. How can we set the $JAVA_HOME environment variable correctly?

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

I've installed a version of Java. How can we set the $JAVA_HOME environment variable correctly?

java

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

edited Oct 9 '15 at 11:44

kiri

18.8k1258104

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

asked Aug 13 '12 at 22:31

Gaurav Agarwal

3,258144061

add a comment |

3 Answers
3

active

oldest

votes

up vote
364
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

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

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 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.

edited Aug 18 '12 at 21:01

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

5

How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36

1

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

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

> 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.

answered Aug 18 '12 at 21:29

Erro

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 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 |

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Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

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3 Answers
3

active

oldest

votes

3 Answers
3

active

oldest

votes

up vote
364
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

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

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 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
364
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

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

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 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
364
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

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

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

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

edited Apr 24 '17 at 18:00

Zanna

49.3k13126236

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

answered Aug 14 '12 at 2:17

Manula Waidyanatha

5,98211619

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 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

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 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

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

@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

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

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

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.

edited Aug 18 '12 at 21:01

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

5

How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36

1

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

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

> 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.

edited Aug 18 '12 at 21:01

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

5

How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36

1

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

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

> 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.

edited Aug 18 '12 at 21:01

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

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

edited Aug 18 '12 at 21:01

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

answered Aug 13 '12 at 23:01

Petronilla Escarabajo

1,44877

5

How does . /etc/environment work?
– Sudip Bhandari
Sep 13 '16 at 13:36

1

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

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

> 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 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

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

> 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?
– Sudip Bhandari
Sep 13 '16 at 13:36

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

@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

add a comment |

up vote
31
down vote

answered Aug 18 '12 at 21:29

Erro

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 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 |

up vote
31
down vote

answered Aug 18 '12 at 21:29

Erro

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 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 |

up vote
31
down vote

answered Aug 18 '12 at 21:29

Erro

65478

answered Aug 18 '12 at 21:29

Erro

65478

answered Aug 18 '12 at 21:29

Erro

65478

answered Aug 18 '12 at 21:29

Erro

65478

answered Aug 18 '12 at 21:29

Erro

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 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 |

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 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

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

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

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 |

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