Java Foundation-io Stream

The simple use of Io flow is very simple ~

 PackageCom.j2se.d59.demo;ImportJava.io.*;//the objects in IO are from java.io.*;//The input and output of the IO stream is relative to the memory Ram//Categories: units "byte stream, character stream" or direction "input stream, output stream" or function "node flow, processing Flow"//All IO streams are extended by four abstract classes://subclasses of InputStream FileInputStream Bufferedinputstream//subclasses of OutputStream FileInputStream Bufferedoutputstream//subclass of Reader FileReader BufferedReader//Writer's subclass FileWriter BufferedWriter Public classIotest { Public Static voidMain (string[] args) {//TODO auto-generated Method Stub//The following code uses the byte stream and the character stream 2 ways to complete the file copy function//1 PreparationString path1 = "d:\\java\\test\\ Red Mansions-Cao Xueqin"; String path2= "d:\\java\\test\\ program creation: Dream of Red Mansions-Cao Xueqin"; String Path3= "d:\\java\\test\\ Red Mansions-Cao Xueqin-copy. txt"; String Path4= "d:\\java\\test\\ program creation: Red Mansions-Cao Xueqin-copy. txt"; byte[] B =New byte[1024 * 256]; Char[] C =New Char[1024 * 256]; //2 StatementFileInputStream FIS =NULL; Bufferedinputstream bis=NULL; FileOutputStream Fos=NULL; Bufferedoutputstream Bos=NULL; FileReader FR=NULL; BufferedReader BR=NULL; FileWriter FW=NULL; BufferedWriter BW=NULL; //3 Create        Try{FIS=NewFileInputStream (path1); Bis=NewBufferedinputstream (FIS); FOS=NewFileOutputStream (path2); Bos=NewBufferedoutputstream (FOS); Fr=NewFileReader (PATH3); BR=NewBufferedReader (FR); FW=NewFileWriter (PATH4); Bw=NewBufferedWriter (FW); //4 Read            intIB =Bis.read (b); //5 Judgment-Method 1            LongT1 =System.currenttimemillis ();  while(Ib > 0) {                //6 ReplicationBos.write (b, 0, IB); //7 CyclesIB =Bis.read (b); }            //8 RefreshBw.flush (); Longt2 =System.currenttimemillis (); System.out.println ("When copying files using the byte stream is complete, time:" + (T2-T1) + "milliseconds"); LongT3 =System.currenttimemillis (); intIC =Br.read (c); //Judgment-Method 2             while(IC > 0) {                //CopyBw.write (c, 0, IC); //LoopsIC =Br.read (c); }            //RefreshBw.flush (); LongT4 =System.currenttimemillis (); System.out.println ("Use character stream to copy file completion, spents:" + (T4-T3) + "milliseconds"); //============= The following are all exception handling code snippets, you can not look at =============}Catch(FileNotFoundException e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); } finally {            //9 Close            if(bis! =NULL) {                Try{bis.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(FIS! =NULL) {                Try{fis.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(Bos! =NULL) {                Try{bos.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(FIS! =NULL) {                Try{fis.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(BR! =NULL) {                Try{br.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(FR! =NULL) {                Try{fr.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(BW! =NULL) {                Try{bw.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }            if(FW! =NULL) {                Try{fw.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }            }        }    }}

Java Foundation-io Stream