When "javac" compiling the ".java" file, it searchs the ".class" files of super class and related classes used in your source files. If it could not find those classes, the error messages about "missing ..." would be returned.
调试欢乐多
Error: could not find java.dll
Error: could not find Java 2 Runtime Environment.会不会是病毒引起的错误啊？这个环境没动过啊，怎么老是出些莫名其妙的错误？！