ArrayList<String> list1 = new ArrayList<String>();
ArrayList<String> list2 = new ArrayList<String>();
BufferedReader reader = new BufferedReader((new InputStreamReader(System.in)));
BufferedReader fileReader1 = new BufferedReader(new FileReader(reader.readLine()));
BufferedReader fileReader2 = new BufferedReader(new FileReader(reader.readLine()));
reader.close();
while(fileReader1.ready()) list1.add(fileReader1.readLine());
fileReader1.close();
while(fileReader2.ready()) list2.add(fileReader2.readLine());
fileReader2.close();
for(int i = 0; i < (list1.size() - 1); i++) {
if (i == (list2.size()) - 1 && list1.get(i).equals(list2.get(i))) {
lines.add(new LineItem(Type.SAME, list1.get(i)));
lines.add(new LineItem(Type.REMOVED, list1.get(i + 1)));
break;
}
else if (list2.get(i).equals(list1.get(i + 1))) {
lines.add(new LineItem(Type.REMOVED, list1.get(i)));
list2.add(i, "");
} else if (list1.get(i).equals(list2.get(i + 1))) {
lines.add(new LineItem(Type.ADDED, list2.get(i)));
list1.add(i, "");
} else if (list1.get(i).equals(list2.get(i))) {
lines.add(new LineItem(Type.SAME, list1.get(i)));
}
}
if(list2.size() == list1.size()) lines.add(new LineItem(Type.SAME, list1.get(list1.size() - 1)));
else if(list2.size() > list1.size()) {
lines.add(new LineItem(Type.SAME, list1.get(list1.size() - 1)));
lines.add(new LineItem(Type.ADDED, list2.get(list2.size() - 1)));
}
for(LineItem t: lines) System.out.println(t.toString());
}
Вариант вывода
SAME 1
REMOVED 2
SAME 3
REMOVED 4
SAME 5
ADDED 0
SAME 1
REMOVED 2
SAME 3
ADDED 4
SAME 5
REMOVED 0
package com.javarush.task.task19.task1916;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.FileReader;
/*
Отслеживаем изменения
*/
public class Solution {
public static List<LineItem> lines = new ArrayList<LineItem>();
public static void main(String[] args) throws IOException {
ArrayList<String> list1 = new ArrayList<String>();
ArrayList<String> list2 = new ArrayList<String>();
BufferedReader reader = new BufferedReader((new InputStreamReader(System.in)));
BufferedReader fileReader1 = new BufferedReader(new FileReader(reader.readLine()));
BufferedReader fileReader2 = new BufferedReader(new FileReader(reader.readLine()));
reader.close();
while(fileReader1.ready()) list1.add(fileReader1.readLine());
fileReader1.close();
while(fileReader2.ready()) list2.add(fileReader2.readLine());
fileReader2.close();
for(int i = 0; i < (list1.size() - 1); i++) {
if (i == (list2.size()) - 1 && list1.get(i).equals(list2.get(i))) {
lines.add(new LineItem(Type.SAME, list1.get(i)));
lines.add(new LineItem(Type.REMOVED, list1.get(i + 1)));
break;
}
else if (list2.get(i).equals(list1.get(i + 1))) {
lines.add(new LineItem(Type.REMOVED, list1.get(i)));
list2.add(i, "");
} else if (list1.get(i).equals(list2.get(i + 1))) {
lines.add(new LineItem(Type.ADDED, list2.get(i)));
list1.add(i, "");
} else if (list1.get(i).equals(list2.get(i))) {
lines.add(new LineItem(Type.SAME, list1.get(i)));
}
}
if(list2.size() == list1.size()) lines.add(new LineItem(Type.SAME, list1.get(list1.size() - 1)));
else if(list2.size() > list1.size()) {
lines.add(new LineItem(Type.SAME, list1.get(list1.size() - 1)));
lines.add(new LineItem(Type.ADDED, list2.get(list2.size() - 1)));
}
for(LineItem t: lines) System.out.println(t.toString());
}
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;
}
@Override
public String toString() {
return type + " " + line;
}
}
}