java - 用 BufferedReader 替换扫描仪

Question

我有一个愚蠢的问题:如何在这种方法中用 BufferedReader 替换 Scanner:

public Coordinates getShot() {
    Scanner scanner = new Scanner(System.in);
    int x,y;
    do {
        System.out.print("Enter Х: ");
        x = Integer.parseInt(scanner.nextLine());
        System.out.print("Enter Y: ");
        y = Integer.parseInt(scanner.nextLine());
        System.out.printf("\nYou entered: [%d,%d]\n", x, y);
        if(!Coordinates.checkCoordinates(x, y))
            System.out.println("Error");
    } while(!Coordinates.checkCoordinates(x ,y));
    Coordinates shot = new Coordinates(x, y);
    return shot;
}

Answer 1

参见Scanner vs. BufferedReader

Scanner is used for parsing tokens from the contents of the stream while BufferedReader just reads the stream and does not do any special parsing.

In fact you can pass a BufferedReader to a scanner as the source of characters to parse.

这是可能的，但没有兴趣在这里使用 BufferedReader:

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
//....
int x,y;
System.out.print("Enter Х: ");
x = Integer.parseInt(reader.readLine());
System.out.print("Enter Y: ");
y = Integer.parseInt(reader.readLine());
System.out.printf("\nYou entered: [%d,%d]\n", x, y);