Output stream in io stream

Byte stream read data

Steps of byte stream reading data
1, An object that creates a byte input stream
2, Adjust the data reading method of byte input stream object
3, Release resources

Read the standard format of data

try {
    
            //FileInputStream(String name) Create byte output stream object 
            FileInputStream fis = new FileInputStream("fos.txt");
          // fis.read();
            while((by=fis.read())!=-1){
    
                System.out.println((char)by);
            }
            fis.close();
        } catch (FileNotFoundException e) {
    
            e.printStackTrace();
        } catch (IOException e) {
    
            e.printStackTrace();
        }

Read the text data and write another text

 // Create byte output output stream object 
FileOutputStream fos = new FileOutputStream("F:\\ Inside the bed and outside the window .txt");
    FileInputStream fis = new FileInputStream(" Inside the bed and outside the window .txt");
    // Read and write data , Copy text file （ Read one byte at a time , Write one byte at a time ）
            // fis.read();
            while((by=fis.read())!=-1){
    
                fos.write(by);
            }

Read the data of one byte array at a time

 FileInputStream fis = new FileInputStream("fos.txt");
            // The method of reading a byte array at a time 
            byte[] bys=new byte[1024];
            int len;
            while ((len=fis.read(bys))!=-1) {
    
                System.out.println(new String(bys,0,len));
            }