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来自 , 2019-05-24, 写在 Java, 查看 112 次.
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/*
* this修饰属性:
* 1.你想要访问的是属性的话,前面就加上this. 例如this.age代表的就是属性的age
* 2.当不发生重名问题(形参或者局部变量和属性重名),this.可以省略不写
* 3.当发生重名问题(形参或者局部变量和属性重名),this.不可以省略了,必须写
* 当发生重名问题(形参或者局部变量和属性重名),出现就近原则
*
*/
public
class
Student
{
//属性
String
name
;
int
age
;
double
height
;
//方法
public
void
eat
(
)
{
System
.
out
.
println
(
/*this.*/
name
)
;
System
.
out
.
println
(
this
.
name
)
;
}
public
void
sleep
(
)
{
int
age
=
20
;
System
.
out
.
println
(
age
)
;
//20
System
.
out
.
println
(
this
.
age
)
;
//19
}
//构造器
public
Student
(
)
{
}
public
Student
(
String
name,
int
age,
double
height
)
{
this
.
name
=
name
;
this
.
age
=
age
;
this
.
height
=
height
;
}
public
static
void
main
(
String
[
]
args
)
{
//创建对象:
Student s
=
new
Student
(
"lili"
,
19
,
150.7
)
;
s.
eat
(
)
;
s.
sleep
(
)
;
}
}
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/* * this修饰属性: * 1.你想要访问的是属性的话,前面就加上this. 例如this.age代表的就是属性的age * 2.当不发生重名问题(形参或者局部变量和属性重名),this.可以省略不写 * 3.当发生重名问题(形参或者局部变量和属性重名),this.不可以省略了,必须写 * 当发生重名问题(形参或者局部变量和属性重名),出现就近原则 * */ public class Student { //属性 String name; int age; double height; //方法 public void eat(){ System.out.println(/*this.*/name); System.out.println(this.name); } public void sleep(){ int age=20; System.out.println(age);//20 System.out.println(this.age);//19 } //构造器 public Student(){ } public Student(String name,int age,double height){ this.name=name; this.age=age; this.height=height; } public static void main(String[] args) { //创建对象: Student s=new Student("lili", 19, 150.7); s.eat(); s.sleep(); } }
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