WeakReference体验

 

Code

 1 using System;
 2 
 3 namespace Demo
 4 {
 5     class Program
 6     {
 7         static void Main(string[] args)
 8         {
 9             //实验1
10             Console.WriteLine("实验1,弱引用");
11             Object obj = new Object();
12             WeakReference wr = new WeakReference(obj);
13             obj = null;
14             GC.Collect();//取消注释结果将不一样，可以体会到垃圾回收的差异
15             Object obj2 = wr.Target;
16             if (obj2 == null)
17             {
18                 Console.WriteLine("obj has collected!");
19             }
20             else
21             {
22                 Console.WriteLine("obj is alive!");
23             }
24 
25 
26             //实验2，强引用
27             Console.WriteLine("实验2，强引用:");
28             Object o1 = new object();
29             Object o2 = o1;
30             o1 = null;
31             GC.Collect();
32 
33             if (o2 == null)
34             {
35                 Console.WriteLine("obj has collected!");
36             }
37             else
38             {
39                 Console.WriteLine("obj is alive!");
40             }
41             
42             Console.Read();
43         }
44     }
45 }