I am trying create a basic file system to imitate the terminal. I am currently stuck on getting the names after the command. My first thought was to use regex to parse the commands.
Examples of commands would be:
mkdir hello
ls
cd hello
However to account for many whitespaces an input could be mkdir hello. I was wondering if there is another way without using regex? Also I was curious to which method is faster? With or without regex?
You could try splitting the lines like
String[] tokens = line.split(" ");
And for basic commands, most likely your command will be at tokens[0] followed by arguments.
for(String current: line.split("\\s+"){
//do something.
}
Usually, regex is faster because you can compile it.
see java.util.regex - importance of Pattern.compile()?
(Internally, I think the JVM always compile the regex at some point, but if you do it explicitly, you can reuse it. I am not sure if the JVM is smart enough to reuse a compiled regex locally, maybe it is)
