java - 如何循环回到java中程序的开头

Question

我知道这是一个简单的 Java 概念，但我现在才刚刚开始学习如何用它编写代码。我想知道是否有人可以帮我写一个语句，以便在打印转换后，打印另一个语句说“键入'redo'以转到程序的开头。”这样他们就可以做出另一种选择。这是我的代码:

package convertorPackage;

import java.util.Scanner;

public class SimpleConvertor {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        double length = 0.39370;

        System.out.println("Welcome to simple convertor.");
        System.out.println("Pick an option and its corresponding letter to select.");
        System.out.println("Farenheight to Celsius: f");
        System.out.println("Celsius to Farenheight: c");
        System.out.println("Inches to Centimeters: i");
        System.out.println("Centimeters to Inches: ce");
        System.out.println("");
        System.out.println("Make your choice: ");
        String choice = input.nextLine();

        if ( choice.equals("f") ) {

            float farenheight;     

            System.out.println("Enter temperatue in Fahrenheit: ");
            farenheight = input.nextInt();

            farenheight = ((farenheight - 32)*5)/9;

            System.out.println("Temperatue in Celsius = " + farenheight);

        } else if ( choice.equals("c") ) {

            float celsius;     

            System.out.println("Enter temperatue in Celsius: ");
            celsius = input.nextInt();

            celsius = ((celsius)*18/10)+32;

            System.out.println("Temperatue in Farenheight = " + celsius);

        } else if ( choice.equals("i") ) {

            double inches;     

            System.out.println("Enter length in Inches: ");
            inches = input.nextInt();

            inches = (inches/length);

            System.out.println("Length in Centimeters = " + inches);
        } else if ( choice.equals("ce") ) {

            double centimeters;     

            System.out.println("Enter length in Centimeters: ");
            centimeters = input.nextInt();

            centimeters = (centimeters*length);

            System.out.println("Length in Inches is = " + length);
        }
    }
}

Answer 1

package convertorPackage;

import java.util.Scanner;

public class SimpleConvertor {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        while (true) {
            //Conversion stuff here
            String response = input.nextLine();
            if (!response.equals("redo")) {
                break;
            }
        }

    }
}