The Java Developers Almanac 1.4

e17. Getting the Parents of a Filename Path

    // Get the parent of a relative filename path
    File file = new File("Ex1.java");
    String parentPath = file.getParent();      // null
    File parentDir = file.getParentFile();     // null
    
    // Get the parents of an absolute filename path
    file = new File("D:\\almanac\\Ex1.java");
    parentPath = file.getParent();             // D:\almanac
    parentDir = file.getParentFile();          // D:\almanac
    
    parentPath = parentDir.getParent();        // D:\
    parentDir = parentDir.getParentFile();     // D:\
    
    parentPath = parentDir.getParent();        // null
    parentDir = parentDir.getParentFile();     // null

Related Examples

e13. Constructing a Filename Path
e14. Converting Between a Filename Path and a URL
e15. Getting an Absolute Filename Path from a Relative Filename Path
e16. Determining If Two Filename Paths Refer to the Same File
e18. Determining If a Filename Path Is a File or a Directory

See also: Directories    Encodings    Files    Parsing    Reading and Writing    Serialization

© 2002 Addison-Wesley.