英文:
error compiling using ant on linux: wrong version 52.0, should be 50.0
问题
以下是翻译好的内容：
在 Windows 上，我使用 Eclipse、Ant 和 Java 1.8 编译我的代码，它完全正常运行。
现在我在 Linux 上进行编译。
我确保下载了 JDK 1.8 和 Ant。
javac -version
javac 1.8.0_91
java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
ant -v
Apache Ant 版本 1.7.1，编译于 2010 年 4 月 26 日
然而，当我运行 ant 启动我的 build.xml 时，仍然失败，似乎是 javac 出了问题。我是否需要设置其他内容？
ant
Buildfile: build.xml
compileBuildDir:
[javac] 正在将 12 个源文件编译到 /build
[javac] Model.java:19: 无法访问 DBObject
[javac] 错误的类文件: Utilities.jar(DBObject.class)]
[javac] 类文件版本错误 52.0，应为 50.0
[javac] 请删除或确保它出现在类路径的正确子目录中。
[javac] import DBObject;
[javac]
BUILD FAILED
/build.xml:173: 编译失败；有关详细信息，请查看编译器错误输出。
当我执行 ant -v 时：
ant -v
Apache Ant 版本 1.7.1，编译于 2010 年 4 月 26 日
Buildfile: build.xml
检测到的 Java 版本：1.6，位于：/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
检测到的操作系统：Linux
正在解析 buildfile /build.xml，URI = file:/test/build.xml
项目基目录设置为：/myProject
[antlib:org.apache.tools.ant] 无法从资源 org/apache/tools/ant/antlib.xml 加载定义。找不到该文件。
目标(packageApplication) 的构建顺序为 [compileBuildDir, packageApplication]
完整的构建顺序为 [compileBuildDir, packageApplication, reports, cleanTmpDir, copyToTmp, copyToTmpplot, ]
英文:
Before I compiled my code on Windows using eclipse ant and java 1.8 and it was fully working.
Now I am using compiling on Linux.
I made sure to download jdk 1.8 and ant.
javac -version
javac 1.8.0_91
java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
ant -v
Apache Ant version 1.7.1 compiled on April 26 2010
However, when I run ant to launch my build.xml, it is still failing from what seems to be wrong javac. Is there something else I need to set?
ant
Buildfile: build.xml
compileBuildDir:
[javac] Compiling 12 source files to /build
[javac] Model.java:19: cannot access DBObject
[javac] bad class file: Utilities.jar(DBObject.class)]
[javac] class file has wrong version 52.0, should be 50.0
[javac] Please remove or make sure it appears in the correct subdirectory of the classpath.
[javac] import DBObject;
[javac]
BUILD FAILED
/build.xml:173: Compile failed; see the compiler error output for details.
When I do a ant -v
ant -v
Apache Ant version 1.7.1 compiled on April 26 2010
Buildfile: build.xml
Detected Java version: 1.6 in: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
Detected OS: Linux
parsing buildfile /build.xml with URI = file:/test/build.xml
Project base dir set to: /myProject
[antlib:org.apache.tools.ant] Could not load definitions from resource org/apache/tools/ant/antlib.xml. It could not be found.
Build sequence for target(s) `packageApplication' is [compileBuildDir, packageApplication]
Complete build sequence is [compileBuildDir, packageApplication, reports, cleanTmpDir, copyToTmp, copyToTmpplot, ]
答案1
得分: 1
Detected Java version: 1.6 in: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
This is your answer - your path setup is not correct.
Look at this here:
https://stackoverflow.com/questions/28180915/class-file-has-wrong-version-52-0-should-be-50-0
英文:
Detected Java version: 1.6 in: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
This is your answer - your path setup is not correct.
Look at this here:
https://stackoverflow.com/questions/28180915/class-file-has-wrong-version-52-0-should-be-50-0
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论