Java计算器软件

下面是一个简单的Java计算器软件示例：

import java.util.Scanner;

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

        System.out.println("欢迎使用Java计算器！");

        while (true) {
            System.out.print("请输入第一个数字：");
            double num1 = scanner.nextDouble();

            System.out.print("请输入第二个数字：");
            double num2 = scanner.nextDouble();

            System.out.println("请选择要进行的操作：");
            System.out.println("1. 加法");
            System.out.println("2. 减法");
            System.out.println("3. 乘法");
            System.out.println("4. 除法");

            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.println(num1 + " + " + num2 + " = " + (num1 + num2));
                    break;
                case 2:
                    System.out.println(num1 + " - " + num2 + " = " + (num1 - num2));
                    break;
                case 3:
                    System.out.println(num1 + " * " + num2 + " = " + (num1 * num2));
                    break;
                case 4:
                    System.out.println(num1 + " / " + num2 + " = " + (num1 / num2));
                    break;
                default:
                    System.out.println("无效的选择！");
            }

            System.out.print("是否要继续计算（Y/N）？");
            String answer = scanner.next();

            if (answer.equalsIgnoreCase("N")) {
                break;
            }
        }

        System.out.println("感谢使用Java计算器！");
    }
}

这个计算器使用了一个无限循环，每次循环中提示用户输入两个数字和要进行的操作，然后根据用户的选择执行相应的计算。用户可以选择继续计算或退出程序。