MyEclipse中could not find the main class. Program will exit.问题
在MyEclipse中运行任何控制台的程序JVM都会出现上述问题，并报如下错误：java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source)Exception in thread "main"
解决办法
确认JAVA编译器和JRE版本一致，在Myeclipse中右键点击项目--->>>preference-->>>JAVA compiler 查看编译器版本右键点击项目--->>>build path--->>>Configure build path--->>>Libraries-->>JRE system library 查看JRE版本如果不一致，修改成一样即可
