Choosing Java version when Installing OpenCV with Homebrew
I am trying to install OpenCV using the Homebrew-based installation instructions from the documentation.
brew edit opencv # edit file and set -DBUILD_opencv_java=ON
brew install --build-from-source opencv
Then I try to use the resulting OpenCV jar in my Java project but it fails at runtime because the Java version used to compile does not match my runtime.
Caused by: java.lang.UnsupportedClassVersionError: org/opencv/core/Core has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I need it to be compiled with Java 8 but it is being compiled with Java 10.
How can I tell Homebrew/OpenCV which version of javac to use?
I have tried setting my JAVA_HOME to the desired location and it still does not work.
java opencv cmake homebrew
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
add a comment |
I am trying to install OpenCV using the Homebrew-based installation instructions from the documentation.
brew edit opencv # edit file and set -DBUILD_opencv_java=ON
brew install --build-from-source opencv
Then I try to use the resulting OpenCV jar in my Java project but it fails at runtime because the Java version used to compile does not match my runtime.
Caused by: java.lang.UnsupportedClassVersionError: org/opencv/core/Core has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I need it to be compiled with Java 8 but it is being compiled with Java 10.
How can I tell Homebrew/OpenCV which version of javac to use?
I have tried setting my JAVA_HOME to the desired location and it still does not work.
java opencv cmake homebrew
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
Where are you setting JAVA_HOME, and are you runningjava -versionbefore building OpenCV?
– cricket_007
Nov 14 '18 at 4:14
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
I've tried setting JAVA_HOME in my~/.bash_profileand adding it to myPATH. I have also tried usingjenvand setting the global java version. Yes, before building OpenCV (using command above) I've runjava -versionand it returns:java version "1.8.0_192"
– ggreiner
Nov 14 '18 at 4:36
add a comment |
I am trying to install OpenCV using the Homebrew-based installation instructions from the documentation.
brew edit opencv # edit file and set -DBUILD_opencv_java=ON
brew install --build-from-source opencv
Then I try to use the resulting OpenCV jar in my Java project but it fails at runtime because the Java version used to compile does not match my runtime.
Caused by: java.lang.UnsupportedClassVersionError: org/opencv/core/Core has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I need it to be compiled with Java 8 but it is being compiled with Java 10.
How can I tell Homebrew/OpenCV which version of javac to use?
I have tried setting my JAVA_HOME to the desired location and it still does not work.
java opencv cmake homebrew
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
I am trying to install OpenCV using the Homebrew-based installation instructions from the documentation.
brew edit opencv # edit file and set -DBUILD_opencv_java=ON
brew install --build-from-source opencv
Then I try to use the resulting OpenCV jar in my Java project but it fails at runtime because the Java version used to compile does not match my runtime.
Caused by: java.lang.UnsupportedClassVersionError: org/opencv/core/Core has been compiled by a more recent version of the Java Runtime (class file version 54.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I need it to be compiled with Java 8 but it is being compiled with Java 10.
How can I tell Homebrew/OpenCV which version of javac to use?
I have tried setting my JAVA_HOME to the desired location and it still does not work.
java opencv cmake homebrew
java opencv cmake homebrew
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
edited Nov 14 '18 at 4:42
ggreiner
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,11213749
9,11213749
Where are you setting JAVA_HOME, and are you runningjava -versionbefore building OpenCV?
– cricket_007
Nov 14 '18 at 4:14
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
I've tried setting JAVA_HOME in my~/.bash_profileand adding it to myPATH. I have also tried usingjenvand setting the global java version. Yes, before building OpenCV (using command above) I've runjava -versionand it returns:java version "1.8.0_192"
– ggreiner
Nov 14 '18 at 4:36
add a comment |
Where are you setting JAVA_HOME, and are you runningjava -versionbefore building OpenCV?
– cricket_007
Nov 14 '18 at 4:14
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
I've tried setting JAVA_HOME in my~/.bash_profileand adding it to myPATH. I have also tried usingjenvand setting the global java version. Yes, before building OpenCV (using command above) I've runjava -versionand it returns:java version "1.8.0_192"
– ggreiner
Nov 14 '18 at 4:36
Where are you setting JAVA_HOME, and are you running
java -version before building OpenCV?– cricket_007
Nov 14 '18 at 4:14
Where are you setting JAVA_HOME, and are you running
java -version before building OpenCV?– cricket_007
Nov 14 '18 at 4:14
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
I've tried setting JAVA_HOME in my
~/.bash_profile and adding it to my PATH. I have also tried using jenv and setting the global java version. Yes, before building OpenCV (using command above) I've run java -version and it returns: java version "1.8.0_192"– ggreiner
Nov 14 '18 at 4:36
I've tried setting JAVA_HOME in my
~/.bash_profile and adding it to my PATH. I have also tried using jenv and setting the global java version. Yes, before building OpenCV (using command above) I've run java -version and it returns: java version "1.8.0_192"– ggreiner
Nov 14 '18 at 4:36
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53293063%2fchoosing-java-version-when-installing-opencv-with-homebrew%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53293063%2fchoosing-java-version-when-installing-opencv-with-homebrew%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Where are you setting JAVA_HOME, and are you running
java -versionbefore building OpenCV?– cricket_007
Nov 14 '18 at 4:14
See stackoverflow.com/questions/26252591/…
– user7294900
Nov 14 '18 at 4:20
I've tried setting JAVA_HOME in my
~/.bash_profileand adding it to myPATH. I have also tried usingjenvand setting the global java version. Yes, before building OpenCV (using command above) I've runjava -versionand it returns:java version "1.8.0_192"– ggreiner
Nov 14 '18 at 4:36