Java IO.pdf - Nguyen Dang Binh

Example 12.2. Paths
import java.io.*;
public class Paths {
}
public static void main(String[] args) {
}
File absolute = new File("/public/html/javafaq/index.html");
File relative = new File("html/javafaq/index.html");
System.out.println("absolute: ");
System.out.println(absolute.getName());
System.out.println(absolute.getPath());
System.out.println("relative: ");
System.out.println(relative.getName());
System.out.println(relative.getPath());
When the program is run on Unix, here's the output:
% java Paths
absolute:
index.html
/public/html/javafaq/index.html
relative:
index.html
html/javafaq/index.html
Java I/O
On Windows with Java 2, the output's a little different, because the File constructor
normalizes the file separator character to the backslash:
D:\JAVA\ioexamples\12>java Paths
absolute:
index.html
\public\html\javafaq\index.html
relative:
index.html
html\javafaq\index.html
12.3.3.3 Absolute paths
The getAbsolutePath() method returns the complete path to the file starting from a
filesystem root:
public String getAbsolutePath()
Examples of absolute paths include /public/html/javafaq/index.html and
D:\JAVA\ioexamples\12 but not html/javafaq/index.html or ioexamples\12. If the File object's
path field is already an absolute path, then its value is returned. Otherwise, a separator
character and the value of the path field are appended to the value of the system property
user.dir, which refers to the current working directory. This method throws a security
exception in most applet environments, because applets are usually not allowed to read the
user.dir property.
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