Java如何将varargs传递给另一个函数，例如Paths.get（）

Question

I'm trying to pass varargs to Paths.get()

From my understanding, varargs essentially interpreted as an array. But get() method expects individual String's not one String array.

How can I pass the varargs through to the method?

import java.nio.file.Path;
import java.nio.file.Paths;

public static Path getLogFilePath(String... stringArgs) {
    int sLen = stringArgs.length;

    Path path = Paths.get(stringArgs); // Cannot resolve method 'get(java.lang.String[])'
    return path;
}

Answer 1

您将必须显式处理第一个参数的分离：

Path path = Paths.get(stringArgs[0], Arrays.copyOfRange(stringArgs, 1, sLen);

Answer 2

Another take on this would be to mimic the Paths.get() prototype :

public static Path getLogFilePath(String first, String... others) {
    if( first == null) {
        throw new IllegalArgumentException("Always a first String !!!");
    }

    Path path = Paths.get(first, others); // Compiles !
    return path;
}

NOTE : Paths.get uses two arguments on purpose to explicitely tell users that at least one String is needed. Implementing a method above it that allows to pass an empty array is, in my opinion, just a RuntimeException in waiting.