Java使用正则表达式拆分将字符串放入数组

Question

I am trying to put a String into an array so I can print the tokens in a different order to how they are in the original file which I am reading from.

Below is the code I have so far, I have also included the input file I am reading from. What I would like to be able to do is print one word from the original file; system.out.println(tokens[4]); Which would print 'Species'

import java.util.Scanner;

public class inClassTest4Time {

  public static void main(String[] args) {

Scanner scan = new  
Scanner(inClassTest4Time.class.getResourcesAsStream("pet.txt"));
String line;
String[] tokens;
    while (scan.hasNextLine()) 
    {
        line = (scan.nextLine());
        tokens = line.split("//s");
        for (int i = 0; i < tokens.length; i++) {
            System.out.println(tokens[i]);

        }

    }


}
}

Input File:

Pet
===================
- species : String
+ isChipped : boolean
- name : String
- age : int
===================
+ Pet ( String name )
===================

Answer 1

I think you meant to put \\\\s instead of //s . //s is actually splitting based on the literal string //s (ie no escaping). Since none of your strings have that, there is no split. I suspect that if you do tokens[2] you will get - species : String .