В чем может быть проблема, знатоки?
package com.javarush.task.task18.task1819;
import java.io.*;
/*
Объединение файлов
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
String file1 = console.readLine();
String file2 = console.readLine();
console.close();
StringBuilder content = new StringBuilder();
try (FileReader reader1 = new FileReader(file1);
FileReader reader2 = new FileReader(file2)) {
while(reader2.ready()){
content.append(reader2.read());
}
while(reader1.ready()){
content.append(reader1.read());
}
}
try(FileWriter writer = new FileWriter(file1)){
writer.write(content.toString());
}
}
}