相关疑难解决方法(0)

到目前为止,我有以下代码:

import java.util.Scanner;

public class HallLanceMemoryCalculator {
private double currentValue;

public static int displayMenu(){

    Scanner input=new Scanner(System.in);

    int choice=0;

    while(choice<1||choice>5){      
    System.out.println("1.Add");
    System.out.println("2.Subtract");
    System.out.println("3.Multiply");
    System.out.println("4.Divide");
    System.out.println("5.Clear");

    System.out.println("What would you like to do?");
    choice=input.nextInt();
    }
    return choice;
}

public static double getOperand(String prompt){
    Scanner input=new Scanner(System.in);
    System.out.println("What is the second number?");
    double secondNumber=input.nextDouble();
    return secondNumber;
}

public  double getCurrentValue(){
    return currentValue;
}

public void add(double operand2){
    currentValue+=operand2;
}

public void subtract(double operand2){
    currentValue-=operand2;
}

public void multiply(double operand2){
    currentValue*=operand2;
}

public void …