重新运行主要方法的主要方法

Question

基本上我需要为这个数学测验做最后一件事我必须编程，我必须问用户他们是否想回答更多问题，如果是的话，重新运行Main方法中的所有内容。如果不是，打印再见。不容易，但我不确定如何告诉它重新运行主要方法，如果他们说是的。这是我主要方法中的代码。

public static void main(String[] args) { 
    Scanner in = new Scanner(System.in); 

    int digit = 0; 

    String result1 = getUserChoice(""); 

    digit = getNumberofDigit1(digit); 

    int numberOfProblems = amountOfProblems(); 

    for (int i = 0; i < numberOfProblems; i++) { 
    int number1 = getRandomNumber1(digit); 
    int number2 = getRandomNumber2(digit); 

    System.out.println("Enter your answer to the following problem: \n" + 
      number1 + result1 + number2); 
    int correctAnswer = getCorrectAnswer(number1, result1, number2); 

    int userAnswer = getUserAnswer(); 

    CheckandDisplayResult(correctAnswer, userAnswer); 
    } 
     System.out.println("Would you like to solve more probelms(Y/N)? "); 
     String moreProblems = in.next(); 

     if ("Y".equals(moreProblems)){ 
      digit = 0; 

    result1 = getUserChoice(""); 

    digit = getNumberofDigit1(digit); 

    numberOfProblems = amountOfProblems(); 

    for (int i = 0; i < numberOfProblems; i++) { 
    int number1 = getRandomNumber1(digit); 
    int number2 = getRandomNumber2(digit); 

    System.out.println("Enter your answer to the following problem: \n" + 
      number1 + result1 + number2); 
    int correctAnswer = getCorrectAnswer(number1, result1, number2); 

    int userAnswer = getUserAnswer(); 

    CheckandDisplayResult(correctAnswer, userAnswer); 
    } 
     System.out.println("Would you like to solve more probelms(Y/N)? "); 
     moreProblems = in.next(); 

      if ("Y".equals(moreProblems)){ 

     } 
     System.out.println("Thank you for taking this quiz, Goodbye!"); 

} 

现在我想是这样，

如果 “Y” .equals（moreProblems））{ 副本和以往的主要方法 }

但是，这需要有一个的错误无限循环，因为如果是的话，你必须有更多的问题陈述，这意味着它永远不会结束编码明智的，你会永远复制和粘贴。

Answer 1

你可以做的是将main()中的所有东西都转换为另一种静态方法，称之为interact()。然后在main()中，只要用户想要与您的程序进行交互，就可以调用interact()。换句话说，将数学测验放入一种方法中，并将测验呈现为main()。如果需要，您的程序将更易于阅读并且更容易进一步修改。

Answer 2

你可以附上你想在一个while循环来 “重新运行” 的代码：

boolean run = true; 
while (run) { 
    // Here your code 
    // Here input if user want to re-run 
    if (getUserChoice("").equals("NO")) 
     run = false; 
} 

Answer 3

将所有东西放入一个大do-while循环：

boolean more = false; 

do { 

    // all your code 

    more = "Y".equals(moreProblems); 

} while (more); 

或者只要您的扫描仪在循环外声明，您可以：

do { 

    // all your code 

} while ("Y".equals(in.next())); 

Answer 4

替代别人的建议，这是方法d我更喜欢：

while(true) { 
    //do all your stuff 
    if(/*some exit condition*/) { break; } 
} 

Answer 5

我想这个原型可以帮助你

import java.util.Scanner; 
public class MathsClass { 
    public static void main(String[] args){ 
     MathsClass object = new MathsClass(); 

     while(object.response()) 
      object.mathsQuiz(); 

    } 

    public void mathsQuiz(){ 
     //your quiz functionalities 
     System.out.println("Add two nos"); 
    } 

    public boolean response(){ 
     System.out.println("Would u like to solve more problems? "); 
     Scanner scanner = new Scanner(System.in); 
     boolean response = scanner.nextBoolean(); 

     return response; 
    } 
}