现在我有这个错误:
线程“main”中的异常java.lang.ArrayIndexOutOfBoundsException:4 在Lotto1.main(Lotto1.java:37)
第37行:arr [count] [0] = s.next()+“”+ s.next();
import java.io.*;
import java.util.*;
public static void main(String[] args) throws IOException {
File f = new File("D:\\Filipe\\Project Final\\src\\database_lotto.txt");
Scanner s;
try {
s = new Scanner(f);
BufferedReader reader = new BufferedReader(new FileReader(f));
int lines = 0;
while (reader.readLine() != null) {
lines++;
}
reader.close();
arr = new String[lines][3];
int count = 0;
//while theres still another line
while (s.hasNextLine()){
arr[count][0] = s.next() + ""+ s.next();
arr[count][1] = s.next();
arr[count][2] = s.next();
count++;
}
} catch (FileNotFoundException ex) {
System.out.println("File does not exist");
}
答案 0 :(得分:3)
您没有将正确的路径放入FileReader只进入File f,您可以将f传递给Filereader而不是重复路径:
File f = new File("D:\\database_lotto.txt");
[...]
BufferedReader reader = new BufferedReader(new FileReader(f));