使用Java从文本文件错误中解析整数

Question

I am trying to write a function that is able to take a text file and separate each line into individual strings and adds them to an array, after which I will take the strings and convert the numbers into Integers or Doubles. However, it keeps returning a NumberFormatException whenever I try to do Integer.parseInt() on the first string in the array, which is always an integer.

This code is a simplified version of what I am attempting to do:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class test {

    public static void main(String[] args) {

        try {

            File file = new File("preprocessed_data.txt");

            Scanner scanner = new Scanner(file);

            while(scanner.hasNextLine()) {

                String line = scanner.nextLine();

                if (line.length() != 0) {

                    // Splitting each line into an array of Strings
                    String[] strings = line.split("\\s+");

                    // Trying to convert the first String into an Integer
                    System.out.println(Integer.parseInt(strings[0]));

                }
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

    }

}

This is the text file which I am trying to process:

11259 8111 +2 14 5.9 5.1 2.0 662.8449 1324.6825 1324.6817 0.0008 1 √ CDFEK($1) KLTK($1) [A1:5 P215:218]

10365 4551 +2 28 11.0 9.0 1.7 643.3196 1285.6320 1285.6245 0.0075 1 √ CDFEK($1) K($1)FR [A1:5 P311:313]

16242 4175 +3 23 13.4 7.3 1.6 546.6142 1637.8280 1637.8316 -0.0035 3 √ CDFEK($1)KK($1)GDKAR [A1:6 O448:453]

27030 24226 +3 16 5.4 6.4 1.7 893.4433 2678.3153 2678.3178 -0.0024 2 √ KSFCAWLNVPNGNK($1) IK($1)DNNMR + OxiM(22) 27031 25071 +3 10 4.8 5.1 2.6 893.4530 2678.3445 2678.3178 0.0267 2 √ KSFCAWLNVPNGNK($1) IK($1)DNNMR + OxiM(22) [A6:19 D503:509]

25104 18270 +3 19 6.8 5.8 1.7 805.7773 2415.3173 2415.2965 0.0207 2 √ KSFCAWLNVPNGNK($1) LRNLK($1) [A6:19 I271:275 A6:19 I329:333 A6:19 I369:373]

27761 30048 +3 37 6.0 6.5 1.7 959.4729 2876.4041 2876.3883 0.0158 1 √ KSFCAWLNVPNGNK($1) ELNEQAGESK($1) [A6:19 I469:478]

26769 27493 +3 17 13.0 6.4 1.3 883.4568 2648.3560 2648.3541 0.0019 1 √ KSFCAWLNVPNGNK($1) KPLDFEK($1) 26781 28982 +3 15 9.4 6.6 1.6 883.4586 2648.3611 2648.3541 0.0070 1 √ KSFCAWLNVPNGNK($1) KPLDFEK($1) [A6:19 K1379:1385]

And this is the error which I keep getting:

Exception in thread "main" java.lang.NumberFormatException: For input string: "11259" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.lang.Integer.parseInt(Integer.java:580) at java.lang.Integer.parseInt(Integer.java:615) at com.company.test.main(test.java:25)

Answer 1

This looks like invisible characters, because your code works for me.

I would highly recommend opening the file in an editor like the notepad.exe on windows and make sure, that there are no invisible characters.

Answer 2

我尝试处理的文本文件是使用UTF-8编码的，一旦我将其切换为ANSI，它就会删除文件开头的不可见字符，并且代码可以正常工作。