opencv unable to locate tools.jar Unable to find a javac compiler

最新推荐文章于 2021-11-30 18:40:24 发布

renzhehongyi

最新推荐文章于 2021-11-30 18:40:24 发布

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分类专栏： Java 环境安装

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本文详细介绍了在使用OpenCV 4.1.0进行编译时遇到的make-j8报错问题，主要原因是未找到tools.jar文件。文章提供了两步解决方案：首先，通过sudo apt-get install ant重新安装ant；其次，将$JAVA_HOME/lib加入环境变量中，确保JAVA_HOME指向正确的JDK路径。

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问题：opencv 编译make -j8报错 unable to locate tools.jar Unable to find a javac compiler

unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-8-openjdk-amd64/lib/tools.jar

Buildfile: /usr/local/opencv-4.1.0/build/modules/java/jar/opencv/build.xml

jar:

Target 'jar' failed with message 'Unable to find a javac compiler;

com.sun.tools.javac.Main is not on the classpath.

Perhaps JAVA_HOME does not point to the JDK.

It is currently set to "/usr/lib/jvm/java-8-openjdk-amd64/jre"'.

BUILD FAILED

原因：ant编译的时候没找到tools.jar

解决：

1.重新安装ant sudo apt-get install ant后

2.将$JAVA_HOME/lib 加入环境变量

JAVA_HOME=/usr/local/jdk1.8.0_73

PATH=$JAVA_HOME/bin:$JAVA_HOME/lib:$PATH

export JAVA_HOME PATH

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