Java self-taught-----FileInputStream class

1, the FileInputStream class function is created:

 PackageCorejava;ImportJava.io.FileInputStream;Importjava.io.IOException; Public classIoutil { Public Static voidPrinthex (String Filename)throwsioexception{/*** Read the specified file inside the glory, follow the 16 output to the console, and * No output 10byte line feed*/FileInputStream in=NewFileInputStream (Filename); intb; inti = 1;  while((b = in.read ())!=-1){            if(b <= 0xf){                //number of units front complement 0System.out.print ("0"); }            //output is displayed in 16-binary form and separated by a spaceSystem.out.print (integer.tohexstring (b) + ""); //line breaks when each row output is greater than or equal to 10 bytes            if(i++%10 = = 0) {System.out.println (); }        }        //close files to avoid exception errorsIn.close (); }}

2. Main function:

 Package Corejava; Import java.io.IOException;  Public class IOUtilTest1 {    publicstaticvoid main (string[] args)throws IOException {        //  TODO auto-generated method stub        ioutil.printhex ("e:\\ JAVA io\\testjava\\ unicom 1.txt ");}    }

Java self-taught-----FileInputStream class