相关疑难解决方法(0)

我试图熟悉java.nio.file.Path.relativize()无济于事.

我已经阅读了javadocs,我看过了一些例子.但是,我仍然无法理解以下示例(我使用Linux,向窗口用户道歉):

程序的工作目录是:/ home/userspace/workspace/java8.

有两个文件:/home/userspace/workspace/java8/zoo.txt和/home/userspace/temp/delete/dictionary.txt

以下程序调用Path.relativize():

package certExam.java8.ch9NIO.paths;
import java.nio.file.Path;
import java.nio.file.Paths;
public class Relativize 
{
    public static void main(String[] args) 
    {
        Path relativePathToZoo = Paths.get("zoo.txt");
        Path relativePathToDictionary = Paths.get("../../temp/delete/dictionary.txt");
        System.out.println("relativePathToZoo.relativize(relativePathToDictionary): "+relativePathToZoo.relativize(relativePathToDictionary));
        System.out.println("relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath(): "+relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath());
        System.out.println("relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath().normalize(): "+relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath().normalize());
        System.out.println("relativePathToDictionary.relativize(relativePathToZoo): "+relativePathToDictionary.relativize(relativePathToZoo));
        System.out.println("relativePathToDictionary.relativize(relativePathToZoo).toAbsolutePath().normalize(): "+relativePathToDictionary.relativize(relativePathToZoo).toAbsolutePath().normalize());
        System.out.println();
    }
}

输出是:

relativePathToZoo.relativize(relativePathToDictionary): ../../../temp/delete/dictionary.txt 
    relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath(): /home/userspace/workspace/java8/../../../temp/delete/dictionary.txt 
    relativePathToZoo.relativize(relativePathToDictionary).toAbsolutePath().normalize(): /home/temp/delete/dictionary.txt 
    relativePathToDictionary.relativize(relativePathToZoo): ../../../../../zoo.txt 
    relativePathToDictionary.relativize(relativePathToZoo).toAbsolutePath().normalize(): /zoo.txt

我的问题,我无法理解的是:为什么relativePathToDictionary.relativize(relativePathToZoo)输出../../../../../zoo.txt？

规范化后,它会让你认为zoo.txt存在于根目录中.

relativize()如何解决这样一条深刻的道路？我知道relativize()与当前工作目录相关,因此它会向每个路径添加.. 但是我无法理解,它如何解决了与fonts.txt相关的zoo.txt的路径.

提前致谢,

卢卡斯