用戶輸入沒有更新相應的變量。當用戶在提示時輸入數字時，我正在嘗試更新 Dexterity 變量。我創建了一個 setDex 方法，當添加到 getDex 方法時，它應該接受用戶輸入量并更新它。getDex 方法應該檢索變量的當前值。public class SetAttributes {    double Dexterity;    double Strength;    double Intelligence;    double Stamina;    double SkillPoints = 50;    public SetAttributes() {        this.setDex(0);        this.setStr(0);        this.setInt(0);        this.setSta(0);        this.setSkillPoints(50);    }    public double getSP(){        return SkillPoints;    }    public double getDex() {        return Dexterity;    }    public double getStr(){        return Strength;    }    public double getInt(){        return Intelligence;    }    public double getSta(){        return Stamina;    }    public void setDex(double dexterity) {        this.Dexterity = Dexterity;    }    public void setStr(double strength){        this.Strength = Strength;    }    public void setInt(double intelligence){        this.Intelligence = Intelligence;    }    public void setSta(double stamina){        this.Stamina = Stamina;    }    public void setSkillPoints(double skillPoints) {this.SkillPoints = SkillPoints;};}public final class PointSpender {    public static void Spend(){        SetAttributes Attribute = new SetAttributes();        Scanner SkillChoice = new Scanner(System.in);        System.out.println("What skill do you want to increase? Dex, Str, Sta, or Int?");        switch(SkillChoice.nextLine().charAt(0)){            case 'd':                System.out.println("How many points towards Dexterity?");                System.out.println("Your current Dexterity is " + Attribute.Dexterity);          double amount = SkillChoice.nextDouble();                Attribute.setDex(amount + Attribute.getDex());              System.out.println(Attribute.Dexterity);