Java input and output stream 1 Fileinputstrem&&fileoutstream

Read the Ask price through the file input stream

 PackageUnit6;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;Importjava.io.IOException;Importjava.nio.channels.FileLockInterruptionException; Public classMyType { Public Static voidMain (string[] args) {Try{fileinputstream fin=NewFileInputStream (args[0]); intCh=Fin.read ();  while(Ch!=-1) {System.out.println (Char) ch); CH=Fin.read (); }        }Catch(arrayindexoutofboundsexception e) {System.out.println ("Use the right Style:java mytype filename"); System.exit (0); }Catch(filenotfoundexception E2) {System.out.println ("File does not find"); }Catch(IOException e3) {System.out.println ("Input stream error!"); }    }}

Copying files from the file input and output stream

 PackageUnit6;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.io.InputStream;ImportJava.io.OutputStream;ImportOrg.xml.sax.InputSource; Public classCopy { Public Static voidMain (string[] args) {intNumberread=0; InputStream in=NULL; OutputStream out=NULL; byteBuf[] =New byte[512]; if(args.length!=2) {System.out.println ("Usage:java copy sourcefile destfile"); System.exit (0); }        Try{ in=NewFileInputStream (args[0]); out=NewFileOutputStream (args[1]);  while((Numberread=in.read (BUF))!=-1) {out.write (buf,0, Numberread); }        }Catch(FileNotFoundException E1) {System.out.println (args[0]+ "Not Found"); System.exit (0); }Catch(IOException E2) {System.out.println ("Error reading/writing file."); }finally{            Try{in.close ();            Out.close (); }Catch(Exception e) {e.printstacktrace (); }} System.out.println ("1 File copyed"); }}

Read characters by file, encrypt files, save as new file

 PackageUnit6;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException; Public classjmcopy { Public Static voidMain (string[] args) {intch; FileInputStream Fin=NULL; FileOutputStream Fout=NULL; Try{fin=NewFileInputStream (args[0]); Fout=NewFileOutputStream (args[1]); intKey=args[2].length (); CH=Fin.read ();  while(Ch!=-1) {fout.write (ch^key); CH=Fin.read ();        } fin.close (); Fout.close (); }Catch(arrayindexoutofboundsexception E1) {System.out.println ("Fomat Error,type:java jmcopy sourcefile destfile Key"); System.exit (0); }Catch(filenotfoundexception E2) {System.out.println ("File not Found"); }Catch(IOException e3) {System.out.println ("Strem error!"); }    }}

Java input and output stream 1 Fileinputstrem&&fileoutstream