BufferedFileCopy

/** * Use buffered streams to copy a file. *  * To use this program, specify the name * of the source file and the destination file. * For example, to copy a file called sample.dat * to a file called sample.bak, use the following * command line: *     java BufferedFileCopy sample.dat sample.bak *  */package FileIO;import java.io.*;/** * @author Administrator * */public class BufferedFileCopy {/** * @param args */public static void main(String[] args) {BufferedInputStream fin;BufferedOutputStream fout;// First make sure that both files have been specified.if (2 != args.length) {System.out.println("Usage: BufferedFileCopy From To");return ;}// Open an input file that is wrapped in a BufferedInputStream.try {fin = new BufferedInputStream(new FileInputStream(args[0]));} catch (FileNotFoundException exc) {System.out.println("Input File Not Found");return ;}// Open an output file that is wrapped in a BufferedOutputStream.try {fout = new BufferedOutputStream(new FileOutputStream(args[1]));} catch (FileNotFoundException exc) {System.out.println("Error Opening Output File");// Close the open input file.try {fin.close();} catch (IOException excIO) {System.out.println("Error Closing Input File");}return ;}/** * Copy the file. * Because buffered stream are used, the * read and write operations are automatically * buffered, which results in higher performance. */try {int i;do {i = fin.read();if (-1 != i)fout.write(i);} while (-1 != i);} catch (IOException exc) {System.out.println("File Error");}try {fin.close();} catch (IOException exc) {System.out.println("Error Closing Input File");}try {fout.close();} catch (IOException exc) {System.out.println("Error Closing Output File");}}}