java - SKIP_SIBLINGS 和 SKIP_SUBTREE 之间的区别

Question

很难说出这里问的是什么。这个问题是含糊的、模糊的、不完整的、过于宽泛的或修辞性的，无法以目前的形式得到合理的回答。如需帮助澄清此问题以便重新打开它， visit the help center 。

已关闭 10 年前。

有人知道这两者之间的区别FileVisitResult ？直接来自this甲骨文教程:

SKIP_SUBTREE – When preVisitDirectory returns this value, the specified directory and its subdirectories are skipped. This branch is "pruned out" of the tree.

SKIP_SIBLINGS – When preVisitDirectory returns this value, the specified directory is not visited, postVisitDirectory is not invoked, and no further unvisited siblings are visited. If returned from the postVisitDirectory method, no further siblings are visited. Essentially, nothing further happens in the specified directory.

Answer 1

看起来你已经回答了你自己的问题，但是如果oracle教程的解释没有消除你所有的疑问，这就是javadoc说:

SKIP_SUBTREE

Continue without visiting the entries in this directory. This result is only meaningful when returned from the preVisitDirectory method; otherwise this result type is the same as returning CONTINUE.

SKIP_SIBLINGS

Continue without visiting the siblings of this file or directory. If returned from the preVisitDirectory method then the entries in the directory are also skipped and the postVisitDirectory method is not invoked.

这是 FileVisitResult 的代码:

public enum FileVisitResult {
/**
 * Continue. When returned from a {@link FileVisitor#preVisitDirectory
 * preVisitDirectory} method then the entries in the directory should also
 * be visited.
 */
CONTINUE,
/**
 * Terminate.
 */
TERMINATE,
/**
 * Continue without visiting the entries in this directory. This result
 * is only meaningful when returned from the {@link
 * FileVisitor#preVisitDirectory preVisitDirectory} method; otherwise
 * this result type is the same as returning {@link #CONTINUE}.
 */
SKIP_SUBTREE,
/**
 * Continue without visiting the <em>siblings</em> of this file or directory.
 * If returned from the {@link FileVisitor#preVisitDirectory
 * preVisitDirectory} method then the entries in the directory are also
 * skipped and the {@link FileVisitor#postVisitDirectory postVisitDirectory}
 * method is not invoked.
 */
SKIP_SIBLINGS;
}

这里还有关于 enums 的教程.