java基础：面向对象编程7-练习2：编写一个方法(method)

package com.atguigu.exer;

class 	Person{
	String name;
	int age;
	int sex;
	
	public void study() {
		System.out.println("studying");
	}
	
	public void showAge(){
		System.out.println("age="+age);
	}	
	
	public int addAge(int i){
		// return age + i; 没有改变age的值
		return age += i;
	}		
}

public class PersonTest {
	public static void main(String[] args) {
		Person person = new Person();
		person.name = "小龙哥";
		person.age= 18;
		person.sex =1;
		
		person.study();
		person.showAge();
		int age = person.addAge(2);		
		System.out.println("age----"+age);
		person.showAge();
		
		System.out.println("-------------------");
		
		Person p = new Person();
		p.name = "小辉哥";
		p.age= 25;
		p.sex =1;
		
		p.study();
		p.showAge();
		int a = p.addAge(2);		
		System.out.println("a----"+a);
		p.showAge();
		
		
			
	}
}

运行结果：