D:\>javac sisi.java
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/M
ain

C:\Documents and Settings\Administrator>java -version
java version "1.5.0_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08-b03)
Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode, sharing)

C:\Documents and Settings\Administrator>javac sisi.java
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/tools/javac/M
ain


变量已经弄好了 但是 不知道怎么运行