本帖最后由 严学韦 于 2012-12-21 14:01 编辑
classname = java.util.ArrayList
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package packge1;
public class ReflectPoint {
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + x;
result = prime * result + y;
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
ReflectPoint other = (ReflectPoint) obj;
if (x != other.x)
return false;
if (y != other.y)
return false;
return true;
}
private int x;
public int y;
public String str1 = "ball";
public String str2 = "base";
public String str3 = "bpple";
public ReflectPoint(int x, int y) {
super();
this.x = x;
this.y = y;
}
public String toString(){
return str1 + ":"+str2 +":"+ str3;
}
}
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package packge1;
import java.io.*;
import java.util.Collection;
import java.util.Properties;
public class ReflectTest2{
public static void main(String[] args)throws Exception {
InputStream ips = new FileInputStream("config.properties");
Properties props = new Properties();
props.load(ips);
ips.close();
String className = props.getProperty("className");
Collection collections = (Collection)Class.forName(className).newInstance();//运行报异常
ReflectPoint pt1 = new ReflectPoint(3,3);
ReflectPoint pt2 = new ReflectPoint(5,5);
ReflectPoint pt3 = new ReflectPoint(3,3);
collections.add(pt1);
collections.add(pt2);
collections.add(pt3);
System.out.println(collections.size());
}
}
运行时报异常了,为什么呀,不应该呀
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