Java Learning Notes (iv)

 1 package CopyFile; 2 3 Import Java.io.FileInputStream; 4 Import java.io.FileNotFoundException; 5 Import Java.io.FileOutputStream; 6 Import java.io.IOException; 7 8/** 9 * Implement file copy * @author Administrator11 *12 */13 public class CopyFile {+ public static void Copybytesfil E (String sfilename,string dfilename) throws ioexception{15 16//create file input stream object and file output stream object 17//File input stream object and source text FileInputStream fis = new FileInputStream (sfilename); 19//File output stream object associated with the target file FileOutputStream FOS = new FileOutputStream (dfilename); 21//loop reads the contents of the file, and writes out to the external disk file in int read = Fis.read ();//reads a byte from the associated source file, If the end of the file is reached, the return value is -123 while (read! =-1) {fos.write (read);//write a byte to the associated target file. Read = Fis.read () ; 26}27//empty cache Close Stream object Fis.close (); Fos.close ();}31 Public Stat         IC void CopyBytesFile2 (String sfilename,string dfilename) throws ioexception{33 34    Create file input stream object and file output stream object 35//file input stream object associated with source file FileInputStream fis = new FileInputStream (sfilename); 3 7///file output stream object associated with target file FileOutputStream fos = new FileOutputStream (dfilename); 39//Cyclic reading Byte[] B = new BYTE[1024];41/* Read multiple bytes from the associated source file, and save it to byte array b if the end of the file is reached. 42 * The return value is-1, otherwise the return value is the number of bytes actually read.                 */44 int read = Fis.read (b);//Read a byte from the associated source file, and if it reaches the end of the file, the return value is -145 while (read! =-1) {46 Fos.write (b);//write a byte to the associated target file. Read = Fis.read (b); 48}49//Empty cache off Stream object Fis.close (); Fos.close ();}53/**54 * @param args55 */56-PU Blic static void Main (string[] args) {//TODO auto-generated method stub59 long t1,t2;60 t1 = S Ystem.currenttimemillis (); try {copyfile.copybytesfile2 ("A.mp3", "Temp.mp3");(IOException e) {//TODO auto-generated catch block65 e.printstacktrace ();}67 t2 = system.cu Rrenttimemillis (); System.out.println ("Spents:" + (T2-T1)); 69 70}71 72}

Elapsed time Comparison:

Final Job Planning:

Make a video player similar to the following

Implementation features:

Play local video

Play/Pause

Fast Forward/Rewind

Sound adjustment

Fullscreen

Minimize/Maximize/close

Group members: Guo Qiang Cheng Wangyu Lotus

Java Learning Notes (iv)