java - 比较文件的某些部分

Question

我有一个问题困扰了我一整天。我想读取文件的一部分并将其与同一文件的其他部分进行比较。如果我可以获得某种关于如何收集第一组线并将其与其他组进行比较，然后移动到下一组并与其余组进行比较的逻辑，直到我将每组线相互比较..

我想要完成的是读取前 3 行，跳过下一行，将其与下 3 行进行比较，跳过下一行并将其与下 3 行进行比较，然后移动到第二 3 行，并将其与第三组和第四组进行比较，依此类推。所以我想做的是类似

 for{ int i=0; i < file.lenght; i++

     for {int j=0; j=i+1; i++{

   }}

但是对于txt文件

示例文件

 this is the way to go
 this is not really it
 what did they say it was
 laughing hahahahahahahaa
 are we on the right path
 this is not really it
 what did they say it was
 smiling hahahahahahahaha
 they are way behind 
 tell me how to get therr
 home here we come
 hahahahahahahaha they laught
 are we on the right path
 this is not really it
 what did they say it was

Answer 1

假设文件适合内存，我将使用 Files.readAllLines(path,charset) (Java 7) 将所有行读入列表，然后在列表上进行比较

如果文件太大，则创建一个方法

List<String> readLines(Scanner sc, int nLines) {
    List<String> list = new ArrayList<>();
    for (int i = 0; i < nLines; i++) {
        list.add(sc.nextLine());
    }
    return list;
}

并用它来读取/跳过文件的部分内容

Scanner sc = new Scanner(new File("path"));
List<String> list1 = readLines(sc, 3);
readLines(sc, 1);
List<String> list2 = readLines(sc, 3);
boolean res = list1.equals(list2)