В чем проблема?
package com.javarush.task.task17.task1721;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
/*
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) {
Solution solution = new Solution();
try {
solution.joinData();
} catch (Exception e) {
e.printStackTrace();
}
}
public void joinData() throws CorruptedDataException, FileNotFoundException {
Scanner scanner = new Scanner(System.in);
String firstFile = scanner.nextLine();
String secondFile = scanner.nextLine();
scanner.close();
scanner = new Scanner(new FileInputStream(firstFile));
while (scanner.hasNext()) {
allLines.add(scanner.nextLine());
}
scanner.close();
scanner = new Scanner(new FileInputStream(secondFile));
while (scanner.hasNext()) {
forRemoveLines.add(scanner.nextLine());
}
scanner.close();
for (String s : forRemoveLines) {
if (!allLines.remove(s)) {
allLines.clear();
throw new CorruptedDataException();
}
}
}
}