FileVisitResult.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package java.nio.file;

/**
 * The result type of a {@link FileVisitor FileVisitor}.
 *
 * @since 1.7
 *
 * @see Files#walkFileTree
 */
// 文件树遍历结果，包含了各种信号，指导后续的遍历行为
public enum FileVisitResult {
    
    /**
     * Continue. When returned from a {@link FileVisitor#preVisitDirectory preVisitDirectory} method
     * then the entries in the directory should also be visited.
     */
    CONTINUE,       // 继续遍历
    
    /**
     * Terminate.
     */
    TERMINATE,      // 结束遍历
    
    /**
     * 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,   // 跳过其他子项
    
    /**
     * 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;  // 跳过其他兄弟项
    
}