File Interface Examples

Extending existing programs to network filesystems should be straightforward using the extensions provided. You simply replace declarations of type java.io.FileXYZ with the counterpart java.io.XFileXYZ. Here are a few simple examples of applications that use the APIs.

Example 2-1 Using Streams Interface

                import java.io.*;

                import java.net.*;

                import com.sun.xfile.*;


                XFile xf = new XFile("file.txt");

                if (xf.isFile()) {

                    System.out.println("file is file");

                }

                if (xf.isDirectory()) {

                    System.out.println("file is directory");

                }

                XFileInputStream nfis = null;

                nfis = new XFileInputStream(xf);

                for (int count = 0; ; count++) {

                    int val = (byte) nfis.read();

                    if (val == -1)

                        break;

                    System.out.write(val);

                }

                System.out.println("read " + count + " bytes ");

Example 2-2 Using XRandomAccessFile Interface

                import java.io.*;

                import java.net.*;

                import com.sun.xfile.*;

                // create connection to host

                XFile xf = new XFile("nfs://ian/simple.html");

                XRandomAccessFile xraf = new XRandomAccessFile(xf,"r");

                int count = 10;

                xraf.seek(count);

                System.out.println("Value at position " + count

                    + " is " + (byte)xraf.read());

                System.out.println("Current file position is "

                    + xraf.getFilePointer());

                xraf.seek(0);

                for (count = 0 ; count < 100 ; count++) {

                    int val = xraf.read();

                    if (val == -1)

                        break;

                    System.out.print(val);

                }