用三个字分割字符串

Question

拆分包含三个单词的字符串的最佳方法是什么？

我的代码现在看起来就像这样(更新的代码见下面)：

BufferedReader infile = new BufferedReader(new FileReader("file.txt"));

        String line;
        int i = 0;

        while ((line = infile.readLine()) != null) {
            String first, second, last;
            //Split line into first, second and last (word)

            //Do something with words (no help needed)
            i++;
        }

下面是完整的file.txt：

Allegrettho Albert 0111-27543 Brio Britta 0113-45771 Cresendo Crister 0111-27440 Dacapo Dan 0111-90519 Dolce Dolly 0116-31418 Espressivo Eskil 0116-19042 Fortissimo Folke 0118-37547 Galanto Gunnel 0112-61805 Glissando Gloria 0112-43918 Grazioso格雷斯0112-43509 Hysterico Hilding 0119-71296 Interludio Inga 0116-22709 Jubilato Johan 0111-47678 Kverulando Kajsa 0119-34995 Legato Lasse 0116-26995 Majestoso Maja 0116-80308 Marcato Maria 0113-25788 Molto Maja 0117-91490 Nontroppo0119-12663专用的Osvald 0112-75541 Parlando Palle 0112-84460钢琴Pia 0111-10729马铃薯Putte 0112-61412 Presto Pelle 0113-54895 Ritardando Rita 0117-20295 Staccato Stina 0112-12107 Subito Sune 0111-37574节拍Kalle 0114-95968 Unisono Uno 0113-16714 Virtuoso Vilhelm 0114-10931 Xelerando Axel 0113-89124

@Pshemo建议的新代码：

public String load() {
    try {
        Scanner scanner = new Scanner(new File("reg.txt"));

        while (scanner.hasNextLine()) {
            String firstname = scanner.next();
            String lastname = scanner.next();
            String number = scanner.next();
            list.add(new Entry(firstname, lastname, number));
        }
        msg = "The file reg.txt has been opened";
        return msg;
    } catch (NumberFormatException ne) {
            msg = ("Can't find reg.txt");
            return msg;
    } catch (IOException ie) {
            msg = ("Can't find reg.txt");
            return msg;
    }
}

我收到多个错误，怎么了？

Answer 1

假设每行总是包含三个单词而不是拆分，那么您可以对每一行使用Scanner的方法next三次。

Scanner scanner = new Scanner(new File("file.txt"));
int i = 0;
while (scanner.hasNextLine()) {
    String first = scanner.next();
    String second = scanner.next();
    String last = scanner.next();
    //System.out.println(first+": "+second+": "+last);
    i++;
}

Answer 2

line.split("\\s+"); // don't use " ". use "\\s+" for more than one whitespace

Answer 3

假设这一行有3+单词，使用split(delimiter)方法：

String line = ...;

String[] parts = line.split("\\s+"); // Assuming words are separated by whitespaces, use another if required

然后您可以分别访问第一、第二和最后一个：

String first = parts[0];
String second = parts[1];
String last = parts[parts.length() - 1];

记住，索引以0开头。