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adminwanglua
java
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java
/
javase
/
code
/
oopdemo1
/
src
/
ThisDemo.java
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master
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java
/
javase
/
code
/
oopdemo1
/
src
/
ThisDemo.java
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/**
* @author: 马士兵教育
* @create: 2019-08-24 16:22
*/
/*
* this:表示当前对象的指针
* 指向当前对象,表示当前对象的引用
* 用处:
* 1、构造方法,当构造方法中的参数名称跟类的成员变量名称一样的时候,可以使用this代表当前对象
* 注意:有了this之后,可以将构造方法的参数跟成员变量保持一致
* 当构造方法中需要调用其他的构造方法时,可以使用this(name)调用其他构造方法,但是必须位于方法体的第一行
* 2、普通方法中:
* 当多个普通方法之间需要调用的时候,可以使用this来进行调用,指的是当前对象的其他方法
* 3、成员变量的使用:
* 当方法中的参数名称跟成员变量保持一致的时候,使用 this.变量名称 表示的是对象的值,而使用变量名称表示形参列表中的值
* */
public
class
ThisDemo
{
String
name
;
int
age
;
public
ThisDemo
(){
}
public
ThisDemo
(
String
name
){
System
.
out
.
println
(
"one"
);
this
.
name
=
name
;
}
public
ThisDemo
(
String
name
,
int
age
){
this
(
name
);
System
.
out
.
println
(
"two"
);
this
.
age
=
age
;
}
public
void
test1
(){
System
.
out
.
println
(
"test1"
);
this
.
test2
(
"hehe"
);
}
public
void
test2
(
String
name
){
System
.
out
.
println
(
"test2"
);
test1
();
System
.
out
.
println
(
name
);
System
.
out
.
println
(
this
.
name
);
}
public
static
void
main
(
String
[]
args
) {
ThisDemo
td
=
new
ThisDemo
(
"zhangsan"
,
12
);
System
.
out
.
println
(
td
.
name
);
System
.
out
.
println
(
td
.
age
);
td
.
test2
(
"lisi"
);
}
}
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