Не могу понять, почему 2й файл не записывается в 1й (тестировал в ИДЕ). Может в FileOutputStream не нужен true?
package com.javarush.task.task18.task1819;
/*
Два в одном
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String file1 = reader.readLine();
String file2 = reader.readLine();
FileInputStream inputStream1 = new FileInputStream(file1);
FileInputStream inputStream2 = new FileInputStream(file2);
byte[]buffer1 = new byte[inputStream1.available()];
byte[]buffer2 = new byte[inputStream2.available()];
inputStream1.read(buffer1);
inputStream1.close();
FileOutputStream outputStream1 = new FileOutputStream(file1, true);
inputStream2.read(buffer2);
inputStream2.close();
outputStream1.write(buffer2);
outputStream1.write(buffer1);
outputStream1.close();
reader.close();
}
}