Java 扫描器不会读取文件末尾的空行

Question

我正在编写一个读取数据文件的文件解析器

BREAK ;
     FI
 REPEAT
  PRINT "bye all"
.
//empty line

并解析字符、空格、(、; 等，并将每个项目存储在 Arraylist 中。我可以读取头部和主体的空行，但不能读取末尾的空行。

Scanner fileInput = new Scanner(new File(path));
int count = 0;
while (fileInput.hasNextLine()) {
    count++;
    line.clear();
    System.out.println("hasNext");
    //line holds entire line since scanner skips spaces
    String a = fileInput.nextLine();
    System.out.println("a is String" + a);
    int i = 0;
    String str = ""; // used to store single word and spaces
    boolean stop = false;
    if (a.isEmpty()) {
        line.add("EoLn");
        System.out.println("line " + count + " EOL");
    }
}

完整来源https://gist.github.com/dcf7a215f3582bae962a.git[1]

Answer 1

默认情况下，Scanner 使用空格作为分隔符。你可以这样做

fileInput.useDelimiter(System.getProperty("line.separator"));