Вроде все проверил не понимаю в чем ошибка.
package com.javarush.task.task17.task1721;
import java.io.*;
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 {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
String firstFileName = br.readLine();
String secondFileName = br.readLine();
br.close();
BufferedReader frf = new BufferedReader(new FileReader(firstFileName));
BufferedReader frs = new BufferedReader(new FileReader(secondFileName));
while (frf.readLine() != null) {
allLines.add(frf.readLine());
}
while (frs.readLine() != null) {
forRemoveLines.add(frs.readLine());
}
frf.close();
frs.close();
} catch (IOException e){}
Solution.joinData();
}
public static void joinData () throws CorruptedDataException {
if (allLines.containsAll(forRemoveLines)){
allLines.removeAll(forRemoveLines);
}
else {
allLines.clear();
new CorruptedDataException();
}
}
}