调用方法时,实参形参传递的过程
- 基本数据类型:直接复制的值
- 封装类型:复制的引用变量的值(引用实例化对象的首地址)
@Data
class User {
private String name;
}
@Test
public void test() {
User user = new User();
user.setName("hello");
int age = 10;
System.out.println("before======" + user + "---" + age);
changeName(user, age);
System.out.println("after=======" + user + "---" + age);
}
private void changeName(User user, int age) {
user.setName("world");
age = 20;
}