17, 18 строчки так должны выглядеть? Я их инициализирую и после в цикле наполняю, но не вижу где ошибка.
package com.javarush.task.task18.task1819;
import java.io.*;
/*
Объединение файлов
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader (new InputStreamReader (System.in));
String fileName1 = reader.readLine();
String fileName2 = reader.readLine();
reader.close();
FileInputStream inputStream1 = new FileInputStream(fileName1);
byte[] buffer1 = new byte[inputStream1.available()];
int count1 = 0;
while (inputStream1.available() > 0) {
buffer1 = new byte[inputStream1.available()];
count1 = inputStream1.read(buffer1);
}
inputStream1.close();
FileOutputStream outputStream = new FileOutputStream(fileName1);
FileInputStream inputStream2 = new FileInputStream(fileName2);
while (inputStream2.available() > 0) {
byte[] buffer2 = new byte[inputStream2.available()];
int count2 = inputStream2.read(buffer2);
outputStream.write(buffer2, 0, count2);
}
while (inputStream1.available() > 0) {
outputStream.write(buffer1, 0, count1);
}
outputStream.close();
inputStream2.close();
}
}