java的一个壳的实现

Jshell is a simple shell implementation in Java. The project contains some default commands (ie: cat, grep ...) Il allows to pipe the out of a command to an other (like in a real shell!) Configuration of the shell By default no command are present in the shell, you have to add them and start the shell like in the example below : ``` import org.jshell.impl.Cat; import org.jshell.impl.Exit; import org.jshell.impl.Grep; public class Test { public static void main(String[] args) { try { Shell shell = new Shell(); shell.registerCommand(new Grep()); shell.registerCommand(new Cat()); shell.registerCommand(new Exit()); shell.start(); } catch(Exception ex) { ex.printStackTrace(); } } } ```