1.方法重载
public class Test
{
public void change(Person person, Person person2)
{
person.name = "lisi";
person2.name = "wangwu";
}
public static void main(String[] args)
{
Person person = new Person();
person.name = "zhangsan";
Person person2 = person;
Test test = new Test();
test.change(person, person2);
System.out.println(person.name);//结果：wangwu
}
}
class Person
{
String name;
}
易错！！！
public class People
{
int age;
public void change(int i)
{
i++;
}
public void change2(People p)
{
p = new People();
p.age++;
}
public void change3(People p, int i)
{
p.age++;
i++;
}
public static void main(String[] args)
{
/*
People people = new People();
int a = 0;
people.change(people.age);
System.out.println(people.age);// 0 原生数据类型值不变
*/
/*
People people = new People();
people.change2(people);
System.out.println(people.age);//0 指向新引用
*/
People people = new People();
people.change3(people, people.age);
System.out.println(people.age);// 1
}
}
