>Убедись, что список lines в нужных местах содержит операции REMOVED c нужными строками.
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 file1Name = reader.readLine();
String file2Name = reader.readLine();
reader.close();
ArrayList<String> listOfStringFile1 = new ArrayList<>();
FileReader fileReader1 = new FileReader(file1Name);
BufferedReader brFile1 = new BufferedReader(fileReader1);
String fileString;
while ((fileString = brFile1.readLine()) != null) {
listOfStringFile1.add(fileString);
}
fileReader1.close();
brFile1.close();
ArrayList<String> listOfStringFile2 = new ArrayList<>();
FileReader fileReader2 = new FileReader(file2Name);
BufferedReader brFile2 = new BufferedReader(fileReader2);
while ((fileString = brFile2.readLine()) != null) {
listOfStringFile2.add(fileString);
}
fileReader2.close();
brFile2.close();
int list;
if (listOfStringFile1.size() >= listOfStringFile2.size()) {
list = listOfStringFile1.size();
} else list = listOfStringFile2.size();
for (int i = 0; i < list; i++) {
if (listOfStringFile2.get(i).equals(listOfStringFile1.get(i))) {
lines.add(new LineItem(Type.SAME, listOfStringFile1.get(i)));
} else if (!listOfStringFile1.equals("") && listOfStringFile2.equals("")) {
lines.add(new LineItem(Type.REMOVED, listOfStringFile1.get(i)));
} else if (listOfStringFile1.equals("") && !listOfStringFile2.equals("")) {
lines.add(new LineItem(Type.ADDED, listOfStringFile2.get(i)));
}
}
/* for (int i = 0; i < listOfStringFile1.size(); i++)
System.out.println(listOfStringFile1.get(i));
System.out.println("----------------------");
for (int i = 0; i < listOfStringFile2.size(); i++)
System.out.println(listOfStringFile2.get(i));
for (int i = 0; i < lines.size(); i++)
System.out.println(lines.get(i).type + lines.get(i).line);
*/
}
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;
}
}
}