The File Class
Instances of the
filenames on the local system, not actual files.
Occasionally, this distinction is crucial. For instance,
objects can represent directories as
well as files. Also, you cannot assume that a file exists just
because you have a
File object for a file.
public class File extends Object implements Serializable
In Java 2, the
File class also implements the
public class File extends Object implements Serializable, Comparable // Java 2
Although there are no guarantees that a file named by a
File object actually exists, the
class does contain many methods for
getting information about the attributes of a file and for
manipulating those files. The
File class attempts
to account for system-dependent features like the file separator
character and file attributes, though in practice it doesn’t do
a very good job, especially in Java 1.0 and 1.1.
File object contains a single
String field called
contains either a relative or absolute path to the file, including
the name of the file or directory itself:
private String path
Many methods in this class work solely by looking at this string. They do not necessarily look at any part of the filesystem.
Constructing File Objects
class has three constructors. Each accepts some variation of a
filename as an argument. This one is the simplest:
public File(String path)
path argument should be either an absolute or relative path ...
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