2020.8.25第五十天

例9.3 析构函数

 1 public class cjava {
 2     public static void main(String[] args) {
 3         Student s1=new Student(10010,"wang ba",'f');
 4        s1.display();
 5        Student s2=new Student(10011,"di di",'m');
 6        s2.display();
 7        s1.finalize();
 8        s2.finalize();
 9 }
10 }
11 class Student{
12     int num;
13     char sex;
14     String name;
15     Student(int n,String nam,char s){
16         num=n;
17         name=nam;
18         sex=s;
19         System.out.println("Constructor called");
20     }
21     protected void finalize(){
22         System.out.println("Destructor called");
23     }
24     void display() {
25         System.out.println("num: "+num);
26         System.out.println("name: "+name);
27         System.out.println("sex: "+sex);
28     }
29 }

2.java没有析构函数，但是有finalize()替代

3.明天继续写例题