Java练习（十九）---类与对象

        public static void main(String[] args){
        Person p = new Person();
        p.test(6);
        int returnsum1 = p.getNum(2,3);
        System.out.println(returnsum1);
    }

    static class Person {
        String name;
        int age;
        String hobby;


        public void test(int n){
            int sum = 0;
            for (int i = 0; i <= n; i++) {
                sum+=i;
            }
            System.out.println(sum);
        }
 
        public int getNum(int num1,int num2){
            int sum1 = num1+num2;
            return sum1;
        }

输出结果：
21
5