一个简单的string.split()出现了可怕的错误

Question

这段代码好像坏了,但我不明白为什么:

System.out.println(line);
// prints: Some Name;1|IN03PLF;IN02SDI;IN03MAP;IN02SDA;IN01ARC

String args[]            = line.split("|");
String candidatArgs[]    = args[0].split(";");
String inscrieriString[] = args[1].split(";");


System.out.println(args[0]);
System.out.println(args[1]);
System.out.println(candidatArgs);
System.out.println("[0]:" + candidatArgs[0]);
System.out.println("[1]:" + candidatArgs[1]);

// prints: S
//         [Ljava.lang.String;@4f77e2b6
//         [0]:

我不知道为什么会这样.按我的逻辑:

String args[]            = line.split("|");
[0]: Some Name;1
[1]: IN02SDI;IN03MAP;IN02SDA;IN01ARC

代替:

[0]: S

如果你想要更多的代码:这应该编译即使它没有做太多(删除尽可能多的不必要的代码)

主要:

有一个文件: Candidati.txt

含: Some Name;1|IN03PLF;IN02SDI;IN03MAP;IN02SDA;IN01ARC

import java.util.ArrayList;

Repository repository = new Repository ("Candidati.txt"); // file name

    ArrayList<Candidat> candidati = repository.getCandidati();
    System.out.println(candidati);

知识库

import java.util.ArrayList;

public class Repository {

    private String fisierCuCandidati;

    private ArrayList<Candidat> listaCandidati;

    public Repository (String fisierCuCandidati) {

        this.fisierCuCandidati = fisierCuCandidati; // file name

        this.listaCandidati = new ArrayList<Candidat>();

        this.incarcaCandidati();
    }


    public void incarcaCandidati() {
        FileReader in = null;
        BufferedReader input = null;

        //try {


            in = new FileReader (this.fisierCuCandidati);
            input = new BufferedReader (in);

            String line;
            while ((line = input.readLine()) != null) {

                System.out.println(line);

                String args[]            = line.split("|");
                String candidatArgs[]    = args[0].split(";");
                String inscrieriString[] = args[1].split(";");


                System.out.println(args[0]);
                System.out.println(args[1]);
                System.out.println(candidatArgs);
                System.out.println("[0]:" + candidatArgs[0]);
                System.out.println("[1]:" + candidatArgs[1]);
            }


}

Candidat

public class Candidat {

    public Candidat (String nume) {

    }

    public Candidat (String nume, int id) {

    }

Answer 1

String.split使用正则表达式,因此您需要转义管道|,这是一个特殊字符(意味着OR):

String args[] = line.split("\\|");

另外要打印String数组输出而不是Object.toString表示,您需要:

System.out.println(Arrays.toString(candidatArgs));