将原来build path中JRE1.6换成jre1.5后,运行'Project/Clean', 启动plug-in时仍然报错,
org.eclipse.core.runtime.CoreException[1]: java.lang.UnsupportedClassVersionError: Bad version number in .class file
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:161)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:501)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:471)
在plug-in.xml的editor中'Overview'tab页,点击'Update the classpath settings', jdk才能真正被换掉。这样会看到一些jdk1.6合法但jdk1.5非法的错误,如对Interface的方法注解Override