Подскажите
package com.javarush.task.task17.task1721;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/*
Транзакционность
*/
public class Solution {
public static List<String> allLines = new ArrayList<String>();
public static List<String> forRemoveLines = new ArrayList<String>();
public static void main(String[] args) throws CorruptedDataException {
try {
new Solution().joinData();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println(allLines);
System.out.println(forRemoveLines);
}
public void joinData() throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String file1 = br.readLine();
String file2 = br.readLine();
BufferedReader readFile1 = new BufferedReader(new FileReader(file1));
BufferedReader readFile2 = new BufferedReader(new FileReader(file2));
while (readFile1.ready()) {
String s = readFile1.readLine();
allLines.add(s);
}
while (readFile2.ready()) {
String s = readFile2.readLine();
forRemoveLines.add(s);
}
if (allLines.containsAll(forRemoveLines)) {
allLines.removeAll(forRemoveLines);
} else {
allLines.clear();
throw new CorruptedDataException();
}
}
}