如何增加年龄以更新类中的默认值？爪哇

Question

狗的年龄只能增加一岁，不能减少。我的代码仍然有错误，说年龄没有增加。

public class Dog {
    private String name;
    private String breed;
    private int age;
    private int weight;
    private double tailLength;
    private static final double TAIL_LENGTH_FOR_DACHSHUND = 3.7;
    

    public Dog(String name, String breed, int age, int weight) {
        this.name = name;
        this.breed = breed;
        this.age = age;
        this.weight = weight;
        this.tailLength = tailLength;
        normalLetters();
    }

    public String getName() {
        return name;
    }

    public String getBreed() {
        return breed;
    }
    
    public int getAge() {
        return age;
    }

    public void setAge(int newAge) {
    if (newAge > this.age) {
        this.age = newAge;
    } else {
        
        System.out.println("Age cannot decrease. Keeping the current age.");
    }
}
    
    public int getWeight() {
        return weight;
    }

    private void setWeight(int weight) {
        this.weight = weight;
    }
    
   public double getTailLength() {
        if (breed.toLowerCase().equals("tax") || breed.toLowerCase().equals("dachshund")) {
            return TAIL_LENGTH_FOR_DACHSHUND;
        } else {
            return (age * weight) / 10.0;
        }
    }

    private void setTailLength(double tailLength) {
        this.tailLength = tailLength;
    }

    private void normalLetters() {
        this.name = normalString(this.name);
        this.breed = normalString(this.breed);
    }

    private String normalString(String input) {
        return input.toUpperCase();
    }

    public String toString() {
        return name + breed + age + weight + tailLength;
    }

    
}

我已经找到了与我已有的解决方案类似的其他解决方案，但没有一个有效。另外，第二次我删除了我已经拥有的那个，它显示测试中存在更多错误，表明年龄没有增加。

Answer 1

像这样尝试一下。不需要错误消息等。根据需要更改方法的名称。

public void updateAge() {
   this.age++;
}