Eclipse普通java Project文件路径问题

Posted 2021-03-07 Link Chen

Eclipse普通java Project文件路径问题

项目的结构如图

读取src里某个包下的文件，代码如下

BufferedReader br=new BufferedReader(new FileReader("src/ch01/practice1/input.txt"));

输出到同一目录下，代码如下

PrintWriter pw=new PrintWriter("src/ch01/practice1/output.txt");

整个算法代码如下

package ch01.practice1;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
//import java.util.Arrays;

//统计数字问题
public class PageNuber
{
	public static void main(String[] args) throws IOException
	{
		BufferedReader br=new BufferedReader(new FileReader("src/ch01/practice1/input.txt"));
		String line=br.readLine();
		if (null!=line)
		{
			int n=Integer.valueOf(line);
			int[] arr= new int[10];
//			Arrays.fill(arr,0);
//			System.out.println(Arrays.toString(arr));
			for (int i = 1; i < n+1; i++)
			{
				int div=i;
				while(div>0)
				{
					arr[div%10]++;
					div=div/10;
				}
			}
//			System.out.println(Arrays.toString(arr));
			PrintWriter pw=new PrintWriter("src/ch01/practice1/output.txt");
			for (int i = 0; i < arr.length; i++)
			{
				pw.print(arr[i]+" ");
			}
			pw.close();
		}
		br.close();
	}
}