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                ### [選取路徑部分片段](https://lingcoder.gitee.io/onjava8/#/book/17-Files?id=%e9%80%89%e5%8f%96%e8%b7%af%e5%be%84%e9%83%a8%e5%88%86%e7%89%87%e6%ae%b5) **Path**對象可以非常容易地生成路徑的某一部分: ~~~ // files/PartsOfPaths.java import java.nio.file.*; public class PartsOfPaths { public static void main(String[] args) { System.out.println(System.getProperty("os.name")); Path p = Paths.get("PartsOfPaths.java").toAbsolutePath(); for(int i = 0; i < p.getNameCount(); i++) System.out.println(p.getName(i)); System.out.println("ends with '.java': " + p.endsWith(".java")); for(Path pp : p) { System.out.print(pp + ": "); System.out.print(p.startsWith(pp) + " : "); System.out.println(p.endsWith(pp)); } System.out.println("Starts with " + p.getRoot() + " " + p.startsWith(p.getRoot())); } } /* 輸出: Windows 10 Users Bruce Documents GitHub on-java ExtractedExamples files PartsOfPaths.java ends with '.java': false Users: false : false Bruce: false : false Documents: false : false GitHub: false : false on-java: false : false ExtractedExamples: false : false files: false : false PartsOfPaths.java: false : true Starts with C:\ true */ ~~~ 可以通過**getName()**來索引**Path**的各個部分,直到達到上限**getNameCount()\*\*。**Path\*\* 也實現了**Iterable**接口,因此我們也可以通過增強的 for-each 進行遍歷。請注意,即使路徑以**.java**結尾,使用**endsWith()**方法也會返回**false**。這是因為使用**endsWith()**比較的是整個路徑部分,而不會包含文件路徑的后綴。通過使用**startsWith()**和**endsWith()**也可以完成路徑的遍歷。但是我們可以看到,遍歷**Path**對象并不包含根路徑,只有使用**startsWith()**檢測根路徑時才會返回**true**。
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