08.this的使用方法

• 使用this调用成员变量和成员函数

1. classPerson{
2. String name;
4. void talk(){
5. System.out.println("my name is "+this.name);
6. }
7. }

 

1. classTestA{
2. publicstaticvoid main(String args[]){
3. Person p1 =newPerson();
4. p1.name ="zhangsan";
6. Person p2 =newPerson();
7. p2.name ="lisi";
9. p1.talk();
10. p2.talk();
11. }
12. }

 

 

• 使用this调用构造函数
• 对this的调用函数必须是构造函数的第一个语句

 

1. classTestA{
2. publicstaticvoid main(String args[]){
3. Person p1 =newPerson("zhangsan",20,"beijing");
4. }
5. }

 

1. classPerson{
2. String name;
3. int age;
4. String address;
6. Person(){
7. System.out.println("无参数的构造函数");
8. }
10. Person(String name,int age){
11. this();
12. this.name = name;
13. this.age = age;
14. System.out.println("两个参数的构造函数");
15. }
17. Person(String name,int age,String address){
18. this(name,age);
19. this.address = address;
20. System.out.println("三个参数的构造函数");
21. }
22. }

 

来自为知笔记(Wiz)