Q: What is the role of% PATH% in environment variables?
A: An environment variable is included between a pair of percentage (%%), which means the current value of the environment variable.
Q: How do you know which development kit is the java command executing in the command line window?
A: Java -verbose
Q: Whether public static void main (string [] args) is equivalent to public static void main (String args [])
A: The equivalent, [] After you can write after the String, you can also write in Args, both of which are correct.
If there is no use of a public modifier before the Class, the name of the source file can be all legitimate names. The class name with the PUBLIC modifier must be the same as the source file name.
In ClassPath settings, the environment variables related to Java are very sensitive to spaces and Chinese, and we should avoid this.
