@ (Error) could not find the main class, program would exit (resolved)

Original @ (Error) could not find the main class, program would exit (resolved)

 

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Today 2011.4.20:This article is I just contact myeclipse when write, a year passed, feel mature point, this article is still a little insufficient, so fill up. -------------------------------------------------A piece of code that works well in JCreator, in MyEclipsealways appears could not find the main class,program would exit. This is enough to explain the code is correct, is the problem of the program. the reasons and solutions are as follows:because the Java class file that we compiled with the higher version of the JDK attempts to run on the lower version of the JVM, the reported error. Because the class file generated by the higher version of the JDK uses a format that may be different from the. class file format of the lower version of the JDK. This way, the lower version of the JVM cannot explain that executing this. class file throws could not find the main Class.program will exit does not support the class version error. This error is particularly noticeable in versions prior to JDK5 and JDK5. Because JDK5 has made a lot of enhancements to the Java syntax, introducing some elements of the new. class file, causing the older JVM to fail to interpret and execute the. class file. Even though this class does not use any new elements of JDK5, the. class file generated by JDK5, JDK1.4, and its previous JVM are unrecognizable. Workaround:1. Find out which JDK version of the program was developed (JDK should not be unfamiliar to Java learners)2. In the MyEclipse menu->windows->proferences->java-> installs JREs re-set the JDK path to the JDK version (e.g.) when developing the program (I'll do it!). My eclipse is 7.0,jdk is 6u13. ) 3. Windows->proferences->java->compiler, set the Compiler compliance level to the same JDK as above (for example, If you were to download the JDK today in 2011, it's probably 1.6, and it's recommended to tick 1.6.-----------------------------------------------------------------------------for the project, sometimes the version issue is also related to the compilation level, then modify it (for example) Solve this problem may need to thank it, is it gave me inspiration,: http://blog.bj50.net/shabby/

@ (Error) could not find the main class, program would exit (resolved)