Week Four Java Learning notes (iv)

Use Bufferedinputstream and bufferedoutputstream to reduce the time to copy audio files and run the effect:

ImportJava.io.BufferedInputStream;ImportJava.io.BufferedOutputStream;ImportJava.io.File;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;Importorg.junit.Test; Public classCopyFile {@Test Public voidTestcopyfile () {LongStart =System.currenttimemillis (); String src= "C:\\users\\think\\desktop\\java Job 4\\a.mp3"; String dest= "C:\\users\\think\\desktop\\java Job 4\\b.mp3";        CopyFile (src,dest); LongEnd =System.currenttimemillis (); System.out.print ("Time Spent:" + (End-start)); }        Private voidCopyFile (String src, string dest) {//using buffered streams for replicationBufferedinputstream bis =NULL; Bufferedinputstream Bos=NULL; Try {        //1. Provide read-in write fileFile file1 =NewFile (SRC); File file2=NewFile (dest); //2. Create the corresponding node streamFileInputStream FIS =NewFileInputStream (FILE1); FileOutputStream Fos=NewFileOutputStream (file2); //3. Passing the created node stream object to the buffered constructorBufferedinputstream bis1 =NewBufferedinputstream (FIS); Bufferedoutputstream BOS1=NewBufferedoutputstream (FOS); //4. Specific operations to implement file replication        byte[] B =New byte[1024];//using arrays for delivery, with 1024 bytes passed        intLen;  while(len = Bis1.read (b))! =-1) {Bos1.write (b,0, Len); }    } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }finally{        //5. Close the stream        if(Bos! =NULL){           Try{bos.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }        if(bis! =NULL){           Try{bis.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }    }  }}

Week Four Java Learning notes (iv)