3, Java_ question Summary

1, not saved / file is empty

D:\java>javac HelloWord.java

D: \ java> java HelloWord
Error: Can not find or load the main class HelloWord

2, the normal procedure, the procedure can not be performed
to add the path to the executable file inside path variable to add a variable name:. "" Path where the value of the file classpath / variable, you can configure multiple, separated by semicolons, indicating the current directory