java - 从 getter 中扣除百分比并显示总计

Question

修复了所有其他问题。目前正在尝试在 FightCrime 函数中从 currentPowerLevel 中扣除 10%。但是，如果没有局部变量，我必须处理用户输入的数字并从中扣除 10%。问题是，通常我会有一个带有设定数字的局部变量，我可以简单地重新访问它并减去乘以 0.1 的数字。

package superherodriver;

/**
 * 
 * @author Daniel
 */
public class SuperHero 
{
    private String name;
    private String superPower;
    private boolean canFly;
    private int crimesStopped;
    private final double MAX_POWER_LEVEL;
    private double currentPowerLevel;

    public SuperHero()
    {
        MAX_POWER_LEVEL = 100;
        name = "";
        superPower = "";
        canFly = false;
        crimesStopped = 0;
        currentPowerLevel = 0;

    }

    //Define non-default constructor
    public SuperHero(String aName, String aSuperPower, double aMaxPowerLevel, boolean aCanFly)
    {
        MAX_POWER_LEVEL = aMaxPowerLevel;
        this.name = aName;
        this.superPower = aSuperPower;
        this.canFly = aCanFly;
        this.crimesStopped = 0;
        this.currentPowerLevel = MAX_POWER_LEVEL;
    }

    //Define getters and setters

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSuperPower() {
        return superPower;
    }

    public void setSuperPower(String superPower) {
        this.superPower = superPower;
    }

    public boolean isCanFly() {
        return canFly;
    }

    public void setCanFly(boolean canFly) {
        this.canFly = canFly;
    }

    public int getCrimesStopped() {
        return crimesStopped;
    }

    public void setCrimesStopped(int crimesStopped) {
        this.crimesStopped = crimesStopped;
    }

    public double getCurrentPowerLevel() {
        return currentPowerLevel;
    }

    public void setCurrentPowerLevel(double currentPowerLevel) {
        this.currentPowerLevel = currentPowerLevel;
    }


}

<小时/>

package superherodriver;
import java.util.Scanner;
import java.util.Random;

/**
 * 
 * @author Daniel
 */

public class SuperHeroDriver {

static Scanner kb = new Scanner(System.in);
public static SuperHero superman;
public static SuperHero wonderwomen;
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        String name, superPower, answer;
        double powerLevel;
        boolean fly;


        System.out.println("What is the name of your favorite super hero?");
        name = kb.nextLine();
        System.out.println("What is your super hero's power?");
        superPower = kb.nextLine();
        System.out.println("Can your super hero fly? (yes or no)");

        while(true){
            answer = kb.nextLine();
            if(answer.equalsIgnoreCase("yes")){
                fly = true;
                break;
            } else if(answer.equalsIgnoreCase("no")){
                fly = false;
                break;
            } else {
                System.out.println("Sorry, you did not enter an approved response. Please answer yes or no.");
            }
        }
        do{
            System.out.println("What is your starting power level? Choose between (0-100)");
            powerLevel = kb.nextDouble();
        } while(powerLevel < 0 || powerLevel > 100);

        kb.nextLine();

        // Non-default contructor
        superman = new SuperHero(name, superPower, powerLevel, fly);
        // Default constructor
        wonderwomen = new SuperHero();

        System.out.println("What is the name of your favorite super hero?");
        wonderwomen.setName(kb.nextLine());
        System.out.println("What is your super hero's power?");
        wonderwomen.setSuperPower(kb.nextLine());
        System.out.println("Can your super hero fly? (yes or no)");

        while(true){
            answer = kb.nextLine();
            if(answer.equalsIgnoreCase("yes")){
                wonderwomen.setCanFly(fly = true);
                break;
            } else if(answer.equalsIgnoreCase("no")){
                wonderwomen.setCanFly(fly = false);
                break;
            } else {
                System.out.println("Sorry, you did not enter an approved response. Please answer yes or no.");
            }
        }

        do{
            System.out.println("What is your starting power level? Choose between (0-100)");
            wonderwomen.setCurrentPowerLevel(kb.nextDouble());
        } while(wonderwomen.getCurrentPowerLevel() < 0 || wonderwomen.getCurrentPowerLevel() > 100);

        do{
            fightCrime(superman, wonderwomen);
            System.out.println("Superman's current power level is " + superman.getCurrentPowerLevel() + " and stopped " + superman.getCrimesStopped() + " crimes.");
            System.out.println("Wonder woman's current power level is " + wonderwomen.getCurrentPowerLevel() + " and stopped " + wonderwomen.getCrimesStopped() + " crimes.");

        }while(superman.getCurrentPowerLevel() > 0 && superman.getCrimesStopped() < 10);

    }

    public static void fightCrime(SuperHero superman, SuperHero wonderwomen){
        Random randomNumber = new Random();
        int ranNum1, ranNum2;       
        ranNum1 = randomNumber.nextInt(11) + 1;
        ranNum2 = randomNumber.nextInt(11) + 1;
        // Stop crime if random number is Even, lose power if odd
        if(ranNum1 % 2 == 0){
            System.out.println("Crime was stopped!");
            superman.setCrimesStopped(superman.getCrimesStopped() + 1);
        }
        else{
            System.out.println("My powers are getting weaker!");
            superman.setCurrentPowerLevel(superman.getCurrentPowerLevel() - 10);
        }

        if(ranNum2 % 2 == 0){
            System.out.println("Crime was stopped!");
            wonderwomen.setCrimesStopped(wonderwomen.getCrimesStopped() + 1);
        }
        else{
            System.out.println("My powers are getting weaker!");
            wonderwomen.setCurrentPowerLevel(wonderwomen.getCurrentPowerLevel() - 10);
        }

    }

}

Answer 1

如何防止提示被跳过？

由于 Scanner.nextDouble() 不会使用用户按 Enter 键时生成的换行符，因此您需要使用 Scanner.nextLine() 手动执行此操作，否则下次您尝试使用该扫描仪读取时，它将立即返回空结果。

powerLevel = kb.nextDouble();
kb.nextLine();

如何增加 getter？

通过获取值，递增它，并将新值发送到 setter 。

superman.setCrimesStopped(superman.getCrimesStopped() + 10);
superman.setCurrentPowerLevel(superman.getCurrentPowerLevel() - 10);