In general, because of project development needs, it is sometimes necessary to consider using different JDK for project building. If the server is running in a JDK6 or JRE6 environment, the client needs to keep the same version for development and integration to avoid some version mismatch errors. Common bug reports that are inconsistent with JDK versions are as follows: Exception in thread "main"
Java.lang.UnsupportedClassVersionError: com/kylin/project/generateeclist:unsupported Major.minor version 51.0 at Java.lang.ClassLoa Der.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.kylin.project.GenerateECList. Program'll exit. eclipse the JDK settings as shown in, click "Windows", "preferences", "Java", "Installed JREs", click "Add ..." button, add a new JDK, assign to the corresponding JDK directory, and set up multiple JDK configurations for the entire workspace. for specific projects, you still need to open the project properties, for the Java BUiD Path setting operation, to specify the use of targeted JDK. As shown in the:
Switch between different JDK settings in Eclipse
