使用throw new Exception 向外層拋異常

    public static void main(String[] args) {
        Human man = new Human();
        try {
            man.setAge(120);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    class Human{
    private int age ;

    public void setAge(int age) throws Exception {
        if(age < 0 || age > 110 ){
            throw new Exception("非法年齡");
        }
        this.age = age;
    }

    @Override
    public String toString() {
        return "我的年齡是: "+age;
    }
    }