Question

我确信这只是归结于我不理解StringTokenizer，但我无法在任何地方找到答案。为什么我会收到此错误？

     import java.io.*;
import java.util.StringTokenizer;
import java.util.Scanner;


public class NHLDemo {
    public static void main(String[] args) throws FileNotFoundException{
        File file = new File("nhlstats");
        Scanner inputFile = new Scanner(file);
        PlayerRecord pr;
        NHLStats list = new NHLStats();
        while(inputFile.hasNext())
        {
            String line = inputFile.next();
            StringTokenizer token = new StringTokenizer(line, "\t");
            while(token.hasMoreTokens()){
                System.out.print(token.nextToken());
                System.out.print(token.nextToken());
                String name = token.nextToken();
                String position = token.nextToken();
                String team = token.nextToken();
                int gp = Integer.parseInt(token.nextToken());
                int g = Integer.parseInt(token.nextToken());
                int a = Integer.parseInt(token.nextToken());
                int pim = Integer.parseInt(token.nextToken());
                int sog = Integer.parseInt(token.nextToken());
                int gwg = Integer.parseInt(token.nextToken());
                pr = new PlayerRecord(name, position, team, gp, g, a, pim, sog, gwg);
                list.add(pr);
            }
        }
        list.enumerate();
    }
}

我正在从特定文件中读取数据，该文件在每行上具有相同数量的令牌

（来自 St.Louis RW TB 48 17 43 14 112 2

Stamkos C TB 48 29 28 32 157 2

Ovechkin RW WSH 48 32 24 36 220 4

Crosby C PIT 36 15 41 16 124 1等。）

Answer 1

当你做String line = inputFile.next（）; line只是St.Louis，所以当你尝试nextToken时你会得到异常

这有效：

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
import java.util.StringTokenizer;

public class MyStringTokenizer {
    public static void main(String[] args){
        try{
        File file = new File("nhlstats");
        BufferedReader input=new BufferedReader(new FileReader(file));
        //Scanner inputFile = new Scanner(file);
        PlayerRecord pr;
        NHLStats list = new NHLStats();
        String line="";
        while((line=input.readLine())!=null)
        {
            if(!line.equals("")){
            StringTokenizer token = new StringTokenizer(line, "\t");
            String name = token.nextToken();
            String position = token.nextToken();
            String team = token.nextToken();
            int gp = Integer.parseInt(token.nextToken());
            int g = Integer.parseInt(token.nextToken());
            int a = Integer.parseInt(token.nextToken());
            int pim = Integer.parseInt(token.nextToken());
            int sog = Integer.parseInt(token.nextToken());
            int gwg = Integer.parseInt(token.nextToken());
            pr = new PlayerRecord(name, position, team, gp, g, a, pim, sog, gwg);
            list.add(pr);
            }
        }
        input.close();
        list.enumerate();
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

为什么我得到NoSuchElementException？

1 个答案: