我如何使该水准仪工作？

Question

我在弄清楚如何制作我的水平系统时遇到了麻烦。当某人需要xP的行cross时，他们应该升级，该方法应打印此信息以及一些操作员功能。仅当值a穿过值b时。或者在这种情况下。如果值a不再是值a，而是变为b。但是只有当它改变时。

// Leveling system
    String[] levels = {"Bitch", "Trainee", "Rookie", "Supervisor", "Pro", "Killer Machine", "Infamous", "Legendary", "Badass", "Badass MOFO"};
    Integer[] xPs = {250, 750, 1500, 3000, 5000, 8000, 12000, 18000, 24000, 36000};
    Integer[] maxHealthArray = {155, 190, 225, 260, 295, 330, 365, 400, 435, 470};


 if(xP < xPs[0]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[0]);
                maxHealth += maxHealthArray[0];
            }
            else if(xP < xPs[1]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[1]);
                maxHealth += maxHealthArray[1];
            }
            else if(xP < xPs[2]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[2]);
                maxHealth += maxHealthArray[2];
            }
            else if(xP < xPs[3]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[3]);
                maxHealth += maxHealthArray[3];
            }
            else if(xP < xPs[4]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[4]);
                maxHealth += maxHealthArray[4];
            }
            else if(xP < xPs[5]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[5]);
                maxHealth += maxHealthArray[5];
            }
            else if(xP < xPs[6]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[6]);
                maxHealth += maxHealthArray[6];
            }
            else if(xP < xPs[7]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[7]);
                maxHealth += maxHealthArray[7];
            }
            else if(xP < xPs[8]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[8]);
                maxHealth += maxHealthArray[8];
            }
            else if(xP < xPs[9]) {
                System.out.println("\nYour xP is: " + xP);
                System.out.println("You have reached a rank of: " + levels[9]);
                maxHealth += maxHealthArray[9];

Answer 1

为什么不在枚举中设置级别？

public enum Levels {
    BITCH("bitch", 250, 155);
    TRAINEE("trainer", 750, 190);

    private final String level;
        private final int xP;
        private final int maxHealth;

    private Levels(String level, int xP, int maxHealth) {
            this.level = level;
            this.xP = xP;
            this.maxHealth = maxHealth;
        }

    public String getLevel(){
        return this.level;
    }

    public int getXP(){
        return this.xP;
    }

    public int getMaxHealth(){
        return this.maxHealth;
    }
}

并使用EnumSet循环通过：

EnumSet.allOf(Levels.class).forEach(level -> {
   if (xP < level.getXP()){
      System.out.println("\nYour xP is: " + xP);   
      System.out.println("You have reached a rank of: " + level.getLevel());
      maxHealth += level.getMaxHealth();
     }
   }
);

请注意，上面的代码尚未经过真正的测试，但是应该可以使您有所了解。

Answer 2

我认为OP想要的东西只能在XP边界条件下触发一次。如果我们继续Enum的想法：

  enum Level {
    Paladin(750, 190, null),
    Peon(250, 155, Paladin);

    private final int maxXp;
    private final int healthBuff;
    private final Level next;

    Level(int maxXp, int healthBuff, Level next) {
      this.healthBuff = healthBuff;
      this.maxXp = maxXp;
      this.next = next; // Questionable means to know "next" Level but is at least final
    }

    // returns null if not applicable
    Level promotionLevel(int xp) {
      return xp > maxXp ? next : null;
    }
  }


  public void checkPromotion() {
    Level next;
    // while() handles multiple promotions, might not be relevant
    while ((next = this.level.promotionLevel(this.xp)) != null) {
      promoteTo(next); 
    }
  }