InputStream ips = new FileInputStream("config.properties");
        Properties props = new Properties();
        ips.close();
        String className = props.getProperty();

InputStream ips = new FileInputStream("config.properties");
Properties props = new Properties();
props.load(ips);//你必须把你的文件加载到集合里，不然你的集合里没元素
ips.close();
String className = props.getProperty();//这个时候，就可以调用了

哪颗最亮的星星 发表于 2013-8-5 21:19
InputStream ips = new FileInputStream("config.properties");
Properties props = new Properties();
pr ...

还是错的呃。。。

1. import java.io.*;
   
2. import java.util.*;
   
3. 
   
4. 
   
5. import com.sun.xml.internal.fastinfoset.sax.Properties;
   
6. 
   
7. public class ReflectTest2 {
   
8. public static void main(String[] args) throws IOException{
   
9.         InputStream ips = new FileInputStream("config.properties");
   
10.         Properties props = new Properties();
    
11.         props.load(ips);
    
12.         ips.close();
    
13.         String className = props.getProperty("className");
    
14.         Collection collections =(Collection)Class.forName(className).newInstance();
    
15.        
    
16.         //Collection collections = new ArrayList();
    
17.         //Collection collections = new HashSet();
    
18.         ReflectionPoint pt1 = new ReflectionPoint(3,3);
    
19.         ReflectionPoint pt2 = new ReflectionPoint(5,5);
    
20.         ReflectionPoint pt3= new ReflectionPoint(3,3);
    
21. 
    
22.                  collections.add(pt1);
    
23.                  collections.add(pt2);
    
24.                  collections.add(pt3);
    
25.                  collections.add(pt1);
    
26. 
    
27.                  pt1.y = 7;   //改完后就取不走了     原来的数据找不着了  就叫做  内存泄露
    
28.                  collections.remove(pt1);
    
29.                  System.out.println(collections.size());  
    
30.                 }
    
31.        
    
32. }

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