Byte stream read data demo example

fos.txt file content:

public  class FileInputStreamDemo {
     public  static  void main (String [] args) throws IOException {
         // Create byte input stream object 
        FileInputStream fis = new FileInputStream ("myFile \\ fos.txt" ); 

        // Call byte input stream object The method of reading data
         // first reading 
        int by = fis.read (); 
        System.out.println (by); // 97 
        System.out.println (( char ) by); // a 
        
        // second Secondary reading 
        by = fis.read (); 
        System.out.println (by); // 98 
        System.out.println (( char)by);　　//b
    }
}

By calling the read method twice and found that the code is too repetitive, can it be improved using loops? If you want to use the loop, you need to know what the end condition of the loop is. You can see it through the help documentation. When you read the end of the stream, it will return -1.

Improve reading by looping:

Modify fos.txt:

 Improved code:

// Improve reading data by loop 
        int by;
         while ((by = fis.read ())! = -1 ) { 
            System.out.print (( char ) by); 
        } 

        // Release resources 
        fis.close () ; 

Operation result: