Question

考虑我有一个带有如下数字的文件 - 文件的名称是 seminar.txt。这个文件是我收集的学生数量的数据集在1月至3月期间参加了我的研讨会。其中一些数据是文本。你的任务是只提取学生人数并计算和显示在三个月内参加研讨会的学生总数。叫这个程序Seminar.java

January
Week 1 23
Week 2 30
Week 3 20
Week 4 40
February
Week 1 20
Week 2 19
Week 3 19
Week 4 20
March
Week 1 10
Week 2 50
Week 3 21
Week 4 20

Answer 1

package com.satya.prakash.service.impl;

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

public class Seminar {

    static String filePath = "D:\\seminar.txt";

    public static void main(String[] args) throws IOException {
        File f = new File(filePath);

        if (f.exists()) {
            BufferedReader br = new BufferedReader(new FileReader(f));

            String str;
            StringBuilder text = new StringBuilder();
            while ((str = br.readLine()) != null) {
                text.append(str);
            }
            String strArray[] = text.toString().replace("January", "").replace("February","").replace("March", "").replace("Week","").trim().split(" ");

            boolean flag=false;
            Integer sum=0;
            for(String s :strArray) {
                if(flag) {
                    try {
                        sum= sum + Integer.parseInt(s);
                    }catch(Exception e) {}
                    flag=false;
                }else
                    flag=true;
            }
            System.out.println("Total Number of Student : "+sum);

        } else
            System.out.println("File Not Found...");

    }

}

Output : Total Number of Student : 129

java存储从文件到数组的整数输入

1 个答案: