/** JShell constructor. Initialize instance variables and map each command to a number. */
public JShell() {
currentDirectory_ = new Directory("", "/", null);
rootDirectory_ = currentDirectory_;
rootDirectory_.setParentDirectory(rootDirectory_);
commands_ = new HashMap<String, Integer>();
commands_.put("exit", 0);
commands_.put("mkdir", 1);
commands_.put("cd", 2);
commands_.put("ls", 3);
commands_.put("pwd", 4);
commands_.put("mv", 5);
commands_.put("cp", 6);
commands_.put("cat", 7);
commands_.put("get", 8);
commands_.put("echo", 9);
commands_.put("rm", 10);
commands_.put("ln", 11);
commands_.put("man", 12);
commands_.put("find", 13);
commands_.put("grep", 14);
}
