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  • Eclipse普通java Project文件路径问题

    Eclipse普通java Project文件路径问题

    项目的结构如图

    java文件路径问题

    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();
    	}
    }
    
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  • 原文地址:https://www.cnblogs.com/linkchen/p/12368214.html
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