Question

我正在解决代码厨师的问题。我遇到了一个问题，所有的说法都是我的错误答案。我想测试我的程序以查看其输出，但它从文本文件读取输入，我无法弄清楚如何使用eclipse，我的代码如下：

import java.io.*;
class Holes {

public static void main(String[] args) throws IOException{
    // TODO Auto-generated method stub
    BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
    int testCases = Integer.parseInt(r.readLine());

    for (int i =0; i<testCases; i++)
    {
        int holes = 0;
        String s = r.readLine();
        for (int j= 0; j< s.length(); j++)
        {
            char c = s.charAt(j);
            if (c == 'B')
                holes += 2;
            else if (c== 'A' || c== 'D' ||c== 'O' ||c== 'P' ||c== 'Q' ||c== 'R' )
            {
                holes +=1;
            }
            System.out.println(holes);
        }
    }   
}

}

Answer 1

将文件夹添加到该文件夹中的eclipse项目中添加输入文件，然后使用BufferReader读取它，如下所示 BufferedReader br = null;

try {

    String sCurrentLine;

    br = new BufferedReader(new FileReader("yourFolder/theinputfile.txt"));

    while ((sCurrentLine = br.readLine()) != null) {
        System.out.println(sCurrentLine);
    }

} catch (IOException e) {
    e.printStackTrace();
} finally {
    try {
        if (br != null)br.close();
    } catch (IOException ex) {
        ex.printStackTrace();
    }
}

另一种方法是将路径作为参数传递给程序如下图所示

try {

        String sCurrentLine;

        br = new BufferedReader(new FileReader(args[0]));

        while ((sCurrentLine = br.readLine()) != null) {
            System.out.println(sCurrentLine);
        }

    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (br != null)br.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

当你运行应用程序运行配置时如何做到这一点，你会发现args你可以在其中添加任何路径，例如c：\ myinput.txt 希望这有帮助

Answer 2

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class BufferedReaderExample {

    public static void main(String[] args) {

        BufferedReader br = null;

        try {

            String sCurrentLine;

            br = new BufferedReader(new FileReader("C:\\testing.txt"));

            while ((sCurrentLine = br.readLine()) != null) {
                System.out.println(sCurrentLine);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null)br.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }

    }
}

如何使用eclipse读取txt文件作为我的system.in

2 个答案: