Choosing Java version when Installing OpenCV with Homebrew
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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
9,23713750
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
9,23713750
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
9,23713750
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
9,23713750
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,23713750
edited Nov 14 '18 at 4:42
ggreiner
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,23713750
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,23713750
asked Nov 14 '18 at 4:07
ggreinerggreiner
9,23713750
9,23713750
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 |
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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