Не пойму в чем проблема?
package com.javarush.task.task19.task1916;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
/*
Отслеживаем изменения
*/
public class Solution {
public static List<LineItem> lines = new ArrayList<LineItem>();
public static void main(String[] args) throws IOException{
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String file_1 = reader.readLine();
String file_2 = reader.readLine();
reader.close();
ArrayList<String>firstFileLines = new ArrayList<>();
ArrayList<String>secondFileLines = new ArrayList<>();
BufferedReader reader1 = new BufferedReader(new FileReader(file_1));
while (reader1.ready()) {
firstFileLines.add(reader1.readLine());
}
reader1.close();
BufferedReader reader2 = new BufferedReader(new FileReader(file_2));
while (reader2.ready()) {
secondFileLines.add(reader2.readLine());
}
reader2.close();
int size = firstFileLines.size() < secondFileLines.size() ? firstFileLines.size() : secondFileLines.size();
while (firstFileLines.size() > 0 && secondFileLines.size() > 0) {
if (firstFileLines.get(0).equals(secondFileLines.get(0))) {
lines.add(new LineItem(Type.SAME, firstFileLines.get(0)));
firstFileLines.remove(0);
secondFileLines.remove(0);
} else if (firstFileLines.get(1).equals(secondFileLines.get(0))) {
lines.add(new LineItem(Type.REMOVED, firstFileLines.get(0)));
firstFileLines.remove(0);
} else if (firstFileLines.get(0).equals(secondFileLines.get(1))) {
lines.add(new LineItem(Type.ADDED, secondFileLines.get(0)));
secondFileLines.remove(0);
}
}
}
public static enum Type {
ADDED, //добавлена новая строка
REMOVED, //удалена строка
SAME //без изменений
}
public static class LineItem {
public Type type;
public String line;
public LineItem(Type type, String line) {
this.type = type;
this.line = line;
}
}
}