new BufferedReader in class Files cannot be applied to given types

Question

List< String> list = new ArrayList<>();

try (BufferedReader br = Files.newBufferedReader(Paths.get(path))) {

    //br returns as stream and convert it into a List
    list = br.lines().collect(Collectors.toList());

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

StringBuilder sb = new StringBuilder();
for (String s : list) {
    sb.append(s);
}

String json = sb.toString();
JSONParser parser = new JSONParser();
obj = parser.parse(json);

I am getting this error please help !!

Answer 1

The Files#newBufferedReader method takes a mandatory second parameter which is a character set. If you try the following code, the error should go away:

List< String> list = new ArrayList<>();

Charset charset = Charset.forName("US-ASCII");

try (BufferedReader br = Files.newBufferedReader(Paths.get(path), charset)) {
    list = br.lines().collect(Collectors.toList());
} catch (IOException e) {
    e.printStackTrace();
}

This assumes that your file is encoded in US-ASCII , though if you had another encoding, you could specify that as well. For example, if your file were UTF-8 encoded, you could use:

Charset charset = StandardCharsets.UTF_8;  

Edit:

After the seeing the accepted answer, I noticed that Java 8 introduced a one argument version of Files#newBufferedReader which just takes a single path as input. However, this is really a helper method which just calls the following:

return newBufferedReader(path, StandardCharsets.UTF_8);

In other words, it defaults to using UTF-8 encoding. If you want to use some other encoding, then my answer is probably the best approach for you.

Answer 2

我猜您正在使用Java 7，它只有一个版本的Files.newBufferedReader方法，该方法将Charset作为第二个参数https://docs.oracle.com/javase/7/docs/api/java/nio/file/Files .html＃newBufferedReader（java.nio.file.Path，％20java.nio.charset.Charset）在Java 8中，您将找到所需的方法https://docs.oracle.com/javase/8/docs/api/ java / nio / file / Files.html＃newBufferedReader-java.nio.file.Path-