Android 工程編譯 Unsupported major.minor version 51.0 錯誤解決方法(JDK版本問題)

在編譯高低版本Android工程時使用以下命令切換Java版本彷佛並不完全java

$ sudo update-alternatives –config javaandroid

$ sudo update-alternatives –config javacoracle

 

會出現以下錯誤:jvm

java.lang.UnsupportedClassVersionError: com/google/doclava/Doclava : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615) 
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 
    at java.NET.URLClassLoader.defineClass(URLClassLoader.java:283) 
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 
    at java.Net.URLClassLoader$1.run(URLClassLoader.java:197) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
    at com.sun.tools.javadoc.DocletInvoker.<init>(DocletInvoker.java:74) 
    at com.sun.tools.javadoc.Start.setDocletInvoker(Start.java:380) 
    at com.sun.tools.javadoc.Start.parseAndExecute(Start.java:179) 
    at com.sun.tools.javadoc.Start.begin(Start.java:128) 
    at com.sun.tools.javadoc.Main.execute(Main.java:41) 
    at com.sun.tools.javadoc.Main.main(Main.java:31) 
Copying: out/target/common/obj/APPS/Telecom_intermediates/classes-jarjar.jar 
Copying: out/target/common/obj/APPS/TelephonyProvider_intermediates/classes-jarjar.jar
javadoc: error - fatal erroride

 

Exception in thread"main"java.lang.UnsupportedClassVersionError: com/android/cts/tradefed/command/CtsConsole : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method) 
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) 
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615) 
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) 
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) 
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58) 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247) 
Could not find the main class: com.android.cts.tradefed.command.CtsConsole.  Program will exit.google

 

解決方法:.net

$ update-java-alternatives –listget

    java-1.7.0-openjdk-amd64 1071 /usr/lib/jvm/java-1.7.0-openjdk-amd64it

    java-6-Oracle 1073 /usr/lib/jvm/java-6-oracleio

$ sudo update-java-alternatives –set java-1.7.0-openjdk-amd64

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