Question

我有一些代码可以从文本文件中读取输入并将其转换为鼠标移动。问题是，一段时间文件变空后，它返回No Line Found Error。我该如何防止这种情况？我试过检查它是否为空，但是没有用。这是代码：

import java.awt.Robot;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Scanner;

public class JavaRobotExample {

    public static void main(String... args) throws Exception {
        while (true) {
            Thread.sleep(3);
            BufferedReader br = new BufferedReader(new FileReader("W:/Mouse/X.txt"));
            BufferedReader br2 = new BufferedReader(new FileReader("W:/Mouse/Y.txt"));

            if (br.readLine() == null || br2.readLine() == null) {
                System.out.println("No errors, and file empty");
                Robot robot3 = new Robot();
                robot3.mouseMove(0, 0);
                    continue;
            }

            Scanner file = new Scanner(new File("W:/Mouse/X.txt"));
            String x_contents = file.nextLine();
            file.close();
            System.out.println(x_contents);
            Scanner yfile = new Scanner(new File("W:/Mouse/Y.txt"));
            String y_contents = yfile.nextLine();
            file.close();
            System.out.println(y_contents);

            int x_int = Integer.parseInt(x_contents);
            int y_int = Integer.parseInt(y_contents);
            Robot robot = new Robot();
            robot.mouseMove(x_int, y_int);
        }
    }
}

Answer 1

不要选中br或br2，而是使用方法file检查Scanner类型的hasNextLine()。

if (file.hasNextLine()) ...

使用“While循环？”时如何防止“No Line Found Error”

1 个答案: