fileinputstream的主要用法

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        //字节流读数据
        //    FileInputStream fileInputStream = new FileInputStream("C:\\\\Users\\\\31339\\\\Desktop\\\\新建文件夹 (7)\\\\fileinput\\\\zsf.txt");

        //fileInputStream.read();
        FileOutputStream fileOutputStream = new FileOutputStream("C:\\Users\\31339\\Desktop\\新建文件夹 (7)\\fileinputstram\\zsf.txt");
        fileOutputStream.write("zsf".getBytes());
        FileInputStream fileInputStream = new FileInputStream("C:\\Users\\31339\\Desktop\\新建文件夹 (7)\\fileinputstram\\zsf.txt");


        // System.out.println((char) fileInputStream.read());
      /*  int by=fileInputStream.read();
        System.out.println(by);
        System.out.println((char) by);

        int by2=fileInputStream.read();
        System.out.println(by2);
        System.out.println((char) by2);

        int by3=fileInputStream.read();
        System.out.println(by3);
        System.out.println((char) by3);

        int by4=fileInputStream.read();
        System.out.println(by4);
        System.out.println((char) by4);

        int by5=fileInputStream.read();
        System.out.println(by5);
        System.out.println((char) by5);
*/
   /*     boolean by;
        while (by=fileInputStream.read()!=-1){

        }


*/


        int by;
        while ((by = fileInputStream.read()) != -1) {
            System.out.print((char) by);
        }
        fileInputStream.close();
    }
}