java - 调用添加输入的方法

Question

我在找出如何根据主类的用户输入获取输出时遇到问题。我已经有了键盘输入，用户可以输入一个值，该值将被保留。我想我需要使用它，例如(input.input1());。但是我还需要包括计算结果的方法，例如 CalculatedRocketFlightProfile 类中的 calculations.theAverageMassFfTheVehicle ，我只是不确定如何将两者结合起来以获得结果。

//计算类

public class CalculatingRocketFlightProfile { //Calculation class

//Declaring fields
public double totalImpulse ;
public double averageImpulse;
public double timeEjectionChargeFires;
public double massEmptyVehicle;
public double engineMass;
public double fuelMass; 
//Declaring variables for outputs
public double theAverageMassOfTheVehicle;
public double theVehiclesMaximumVelocity;

public CalculatingRocketFlightProfile(double totalImpulse, double averageImpulse, double timeEjectionChargeFires, double massEmptyVehicle,
                                  double engineMass, double fuelMass) { //Constructor for this class

                        this.totalImpulse  = totalImpulse;
                        this.averageImpulse = averageImpulse;
                        this.timeEjectionChargeFires = timeEjectionChargeFires;
                        this.massEmptyVehicle = massEmptyVehicle;
                        this.engineMass = engineMass;
                        this.fuelMass = fuelMass;
                    }


//Mutators and Accessors

//Accessors
//Methods for calculations - Calculating outputs, using inputs. 

public double theAverageMassOfTheVehicle() {
    return massEmptyVehicle + ((engineMass + (engineMass - fuelMass) )/ 2);  //Formula to calculate Average mass 
}//method

public double theVehiclesMaximumVelocity() { //Formula to calculate Maximum velocity
    return totalImpulse / getTheAverageMassOfTheVehicle();
}//method



//Returns - GET
public double getTheAverageMassOfTheVehicle() {
    return theAverageMassOfTheVehicle;
}//method

public double getTheVehiclesMaximumVelocity() {
    return theVehiclesMaximumVelocity;
}//method

}//class

//主类

public class Main { //Master class


        public static void main( String args[] ) //Standard header for main method
        {



        kbentry input = new kbentry();

        System.out.print("\nPlease enter a number for Total Impulse: " );
        System.out.println("You have entered : " +input.input1());


        System.out.print("\nPlease enter a number for Average Impulse: " );
        System.out.println("You have entered : " +input.input2());

        System.out.print("\nPlease enter a number for Time ejection charge fires: " );
        System.out.println("You have entered : " +input.input3());

        System.out.print("\nPlease enter a number for the Mass of the vehicle: " );
        System.out.println("You have entered : " +input.input4());

        System.out.print("\nPlease enter a number for the Mass of the engine: " );
        System.out.println("You have entered : " +input.input5());

        System.out.print("\nPlease enter a number for the Mass of the fuel: " );
        System.out.println("You have entered : " +input.input6());

        //Output

        CalculatingRocketFlightProfile calculations = new CalculatingRocketFlightProfile();


        System.out.println("\nThe average mass of the vehicle: " +calculations.theAverageMassOfTheVehicle() +
                           "\nThe vehicles maximum velocity: " + calculations.theVehiclesMaximumVelocity());

        }
        }

//kbentry

public class kbentry{

double input1(){

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

//Total Impulse entry
String strTotalImpulse = null;  // These must be initialised
int    intTotalImpulse = 0;

//System.out.print("Please enter a number for Total Impulse: ");
//System.out.flush();

// read string value from keyboard
try {
  strTotalImpulse = in.readLine();
} 
catch (IOException ioe) { 
  // ignore exception
       }

// convert it to integer
try {
  intTotalImpulse = Integer.parseInt(strTotalImpulse);
} 
catch (NumberFormatException nfe) {
   System.out.println("Error! Please enter a number!" + nfe.toString());

}

Answer 1

问题是您的 CalcultingRocketFlightProfile 类需要参数，但您在创建计算时没有将任何参数传递给新的 CalcultingRocketFlightProfile。

您应该将这些输入存储在变量中，然后将这些变量传递给您声明的新 CalcultingRocketFlightProfile 中的构造函数。