В консоль должен выводиться минимальный байт, считанный из файла.
package com.javarush.task.task18.task1802;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
/*
Минимальный байт
*/
public class Solution {
public static void main(String[] args) throws Exception {
int countFirstByte = 0;
int countSecondByte = 0;
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream fileInputStream = new FileInputStream(reader.readLine());
while (fileInputStream.available() > 0) {
fileInputStream.read();
if (countFirstByte == 0 || fileInputStream.read() < countFirstByte) {
countFirstByte = fileInputStream.read();
}
if (countSecondByte == 0 || fileInputStream.read() < countSecondByte){
countSecondByte = fileInputStream.read();
}
if (countFirstByte > countSecondByte){
countSecondByte = fileInputStream.read();
}
}
System.out.println(countSecondByte);
fileInputStream.close();
}
}