java.lang.UnsupportedClassVersionError: myApp : Unsupported major.minor version 51.0 (unable to load class myApp) 在 Linux 上
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java.lang.UnsupportedClassVersionError: myApp : Unsupported major.minor version 51.0 (unable to load class myApp) On Linux
提问by Deepu
Recently I am the facing problem with Apache Tomcat 6.0.35 on Linux Centos. I am getting the error -
最近我在 Linux Centos 上遇到了 Apache Tomcat 6.0.35 的问题。我收到错误 -
java.lang.UnsupportedClassVersionError: myApp : Unsupported major.minor version 51.0 (unable to load class myApp)
When I give the command -
当我发出命令时——
java -version
It Shows
表明
java version "1.6.0_22"
OpenJDK Runtime Environment (IcedTea6 1.10.9) (rhel-1.28.1.10.9.el5_8-x86_64)
OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode)
Similarly When I give the command -
同样，当我发出命令时 -
javac -version
It shows -
表明 -
javac 1.6.0_22
To locate the Java I give the command -
要定位 Java，我给出了命令 -
whereis java
The output is -
输出是 -
java: /usr/bin/java /etc/java /usr/lib/java /usr/share/java /usr/share/man/man1/java.1.gz
And for
而对于
which java
It displays -
它显示——
/usr/bin/java
Also for
也为
which javac
Output is
输出是
/usr/bin/javac
Where myAppis java project developed in Windows and Uploaded the WAR file in Tomcats' webappdirectory on Linux.
其中myApp是在 Windows 中开发的 java 项目，并在Linux上的Tomcats 的webapp目录中上传了 WAR 文件。
I am not getting what is happening? Please can anybody please help me to resolve the problem?
我不明白发生了什么？请问有人可以帮我解决问题吗？
Thanks in advance.
提前致谢。
采纳答案by ziesemer
You need a Java 7 runtime, not Java 6. See http://en.wikipedia.org/wiki/Java_class_file#General_layoutfor some details concerning this.
您需要 Java 7 运行时，而不是 Java 6。有关这方面的一些详细信息，请参阅http://en.wikipedia.org/wiki/Java_class_file#General_layout。
Alternatively, you need to find and/or re-compile your code to be compatible with Java 6.
或者，您需要查找和/或重新编译您的代码以与 Java 6 兼容。
回答by basiljames
The exception is because yor code is compiled using a higher version than the one you are trying to run it on. In your windows machine you might be using windows 7 to build the war. Check javac -versionin your windows machine.
例外是因为您的代码是使用比您尝试运行的版本更高的版本编译的。在您的 Windows 机器上，您可能正在使用 Windows 7 来构建War。检查javac -version您的 Windows 机器。
回答by Peter Svensson
Looks like your code is compiled with jdk7?
看起来你的代码是用jdk7编译的？
