Результат как в примере:
SAME строка1
REMOVED строка2
SAME строка3
REMOVED строка4
SAME строка5
ADDED строка0
SAME строка1
REMOVED строка2
SAME строка3
ADDED строка4
SAME строка5
REMOVED строка0package 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<>();
public static void main(String[] args) throws IOException {
BufferedReader bufRed = new BufferedReader(new InputStreamReader(System.in));
String name = bufRed.readLine();
String name2 = bufRed.readLine();
bufRed.close();
BufferedReader bufFile = new BufferedReader(new FileReader(name));
BufferedReader bufFile2 = new BufferedReader(new FileReader(name2));
StringBuffer stringBufFi = new StringBuffer();
StringBuffer stringBufFil = new StringBuffer();
while (bufFile.ready()) {
stringBufFi.append(bufFile.readLine() + " ");
}
while (bufFile2.ready()) {
stringBufFil.append(bufFile2.readLine() + " ");
}
bufFile2.close();
bufFile.close();
String start = " ";
String[] stroka = stringBufFi.toString().split(start);
String[] stroka2 = stringBufFil.toString().split(start);
int schetcikDou=0;
for (int i = 0; i < stroka.length; i++) {
boolean fl =false;
for (int j = schetcikDou; j < schetcikDou + 2; j++) {
if (j<stroka2.length&&stroka[i].equals(stroka2[j])) {
if (j == schetcikDou + 1) {
lines.add(new LineItem(stroka2[j - 1], Type.ADDED));
lines.add(new LineItem(stroka[i], Type.SAME));
schetcikDou++;
schetcikDou++;
fl = true;
} else {
lines.add(new LineItem(stroka[i] , Type.SAME));
schetcikDou++;
j++;
fl = true;
} } }
if (!fl) {
lines.add(new LineItem(stroka[i], Type.REMOVED));
} }
int a= stroka.length;
if(a<stroka2.length) {
lines.add(new LineItem(stroka[a],Type.REMOVED));a++;
}
}
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(String line, Type type) {
this.type = type;
this.line = line;
} } }