java - 嵌套循环中没有中断？

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正在处理一项需要分解素数的任务。这是我想出的解决方案:

import java.util.Scanner;

public class Task8 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Which number to factorize:");

        int number = input.nextInt();

        System.out.println();

        int counter = 1;

        for (int i = 2; i <= number; i++) {
            while (number % i == 0) {

                if (counter == 1 && i == number) {
                    System.out.println("The number is a prime, can’t be factorized.");
                    break;
                } else {

                    System.out.println("Prime" + " " + "#" + counter + ":" + " " + i);
                    number = number/i;
                    ++counter;
                }
            }
        }
    }
}

但是，我目前正在研究的一本书强烈建议不要在循环中使用break语句。那么在这种情况下如果没有一个我该怎么办？

干杯!

Answer 1

这是一种实现方法。我对我的更改发表了评论:

import java.util.Scanner;

public class Task8 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Which number to factorize:");

        int number = input.nextInt();

        System.out.println();

        int counter = 1;

        for (int i = 2; i <= number; i++) {
            boolean canBeFactored = true; // Add a flag
            while (canBeFactored && number % i == 0) { // Add a check
                if (counter == 1 && i == number) {
                    System.out.println("The number is a prime, can’t be factorized.");
                    canBeFactored = false; // Set that check to false
                } else {

                    System.out.println("Prime" + " " + "#" + counter + ":" + " " + i);
                    number = number/i;
                    ++counter;
                }
            }
        }
    }
}