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