API Contents - SCJP Sun Certified Programmer for Java Platform SE6 - page 290

and FileOutputStream to high-level streams to buffer and fi lter the data into appropriate data
types.
The following CopyFile program demonstrates these two classes by reading the bytes
from one fi le and copying them into another, making a byte-by-byte copy of the fi le:
1. package com.sybex.io;
2.
3. import java.io.*;
4.
5. public class CopyFile {
6. public static void copy(File src, File dest)
7. throws IOException {
8. FileInputStream in = new FileInputStream(src);
9. FileOutputStream out = new FileOutputStream(dest);
10. int c;
11. try {
12. while((c = in.read()) != -1) {
13. out.write(c);
14. }
15. }finally{
16. in.close();
17. out.close();
18. }
19. }
20.
21. public static void main(String [] args) {
22. try {
23. File source = new File(“States.class”);
24. File destination = new File(“copyofStates.class”);
25. copy(source, destination);
26. }catch(IOException e) {
27. e.printStackTrace();
28. }
29. }
30. }
The following breakdown illustrates what the CopyFile program does:
1. Within main on lines 23 and 24, two File objects are instantiated to represent the
pathnames to the source and destination files.
2. The copy method is called on line 25, and the two File references are copied into the
src and dest parameters.