每次从文件中读取单个字符串

Question

Abe
Bobby
Joseph
yyvoynne
Kathryn

^^我正在读取的文件。我如何一次读取一个单词，将这个单词赋值给一个变量，对它做一些操作，然后从文件中读取另一个名称?我只是在纠结如何将我读入的单词赋值给一个变量。谢谢你的宝贵时间。

while(names.hasNext())
        {
            //Stuff
        }

Answer 1

我想你是想从文件中逐行读取。

你可以试试这个:这是从文件中读取的一种常用方法。

BufferedReader br = new BufferedReader(new FileReader(file));
String line;
String word;
while ((line = br.readLine()) != null) {
    word = line;
    //do stuff with word
}
br.close();

Answer 2

while(names.hasNext())
        {
         String name = names.next(); // Assuming Scanner is used to read file
        }

Answer 3

也许你想要这样:

while(names.hasNext()){
    String name = names.next();
    ... do stuff...
}

Answer 4

Path path = Paths.get("names-in-cwd.txt"); /* Relative or absolute path here. */
Charset encoding = StandardCharsets.UTF_8; /* Or whatever it is really. */
for (String name : Files.readAllLines(path, encoding)) {
  /* Do stuff with value in "name" variable ... */
}

Answer 5

您可以使用Scanner并使用useDelimiter(String regex)方法来完成此操作:

确保添加了这些导入:

import java.util.ArrayList;
import java.util.Scanner;

然后你可以这样做，使用ArrayList来保存名称。

try {
    Scanner file = new Scanner(new File("yourFileNameAndPath.txt"));
    file.useDelimiter("\s+"); // split names by any whitespace
    // list is the ArrayList to hold all of the names
    ArrayList<String> list = new ArrayList<String>();
    while (file.hasNext()) {
        list.add(file.next());
    }
    // print it out to test
    // new element (name) after every ###
    for (int i = 0; i < list.size(); i++) {
        System.out.println(list.get(i) + "###");
    }
    print(list.size()); // print number of names found
} catch (Exception e) {
    System.out.println("Error");
}

---

对于您的文件，这是输出:

Abe###
Bobby###
Joseph###
yyvoynne###
Kathryn###
5