hw4/src/main/java/org/example/task2/SumNumbers.java - master - alim4ik-had/SberJavaCourseBeginner

hw4/src/main/java/org/example/task2/SumNumbers.java
57 строк2 KB
alimo
findSum_program
02 апр 2025, 20:39
02 апр 2025, 20:39d30d797
package org.example.task2;

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class SumNumbers {
    public static String findSum(String text){
        String[] arrayElems = text
                .replaceAll("[^\\d,.-]", " ")
                .replaceAll(",", ".")
                .split(" +");
        double sum = 0;
        String sumText = "";
        String changeElem = "";
        for (String elem : arrayElems) {
            try {
                changeElem = elem.replaceFirst("^[.]+", "").replaceFirst("[.]+$", "");
                sum += Double.parseDouble(changeElem);
                sumText += changeElem + " + ";
            } catch (NumberFormatException e) {
                //на случай если в тексте есть запись, подобная 2.2.2 или 2-2-2
                Pattern patternNum = Pattern.compile("-?\\d+");
                Matcher matcher = patternNum.matcher(changeElem);
                String currentNum;
                while (matcher.find()){
                    currentNum = matcher.group();
                    sum += Double.parseDouble(currentNum);
                    sumText += currentNum + " + ";
                }
            }
        }
        return getFinishSum(sumText, sum);
    }

    private static String getFinishSum(String sumText, double sum){
        StringBuilder newSumText = new StringBuilder(sumText);
        int lastPlusIndex = newSumText.lastIndexOf("+");
        int firstPlusIndex = newSumText.indexOf("+");
        if(lastPlusIndex == -1){
            return "В тексте нет чисел!";
        }
        else if (lastPlusIndex == firstPlusIndex){
            newSumText.setCharAt(lastPlusIndex, ' ');
            //возврат без последних пробелов
            return newSumText.toString().substring(0, newSumText.length()-3);
        }
        newSumText.setCharAt(lastPlusIndex, '=');
        sumText = newSumText.toString();
        sumText += sum;
        return sumText;
    }

    public static void main(String[] args) {
        System.out.println(findSum("hello6сррунумуи9рсиврмр-3аисрвим3.5оовоа+1овово-9"));
    }
}