java反射中为何声明private的构造函数变成默认型

import java.lang.reflect.*;public class accesstest
{
static void start(){
Class cl=obj.class;
Constructor [] c=cl.getDeclaredConstructors();
for (Constructor i:c)
System.out.println(i.toString());
}
public static void main(String[] args){
start();
}

}
class obj{
private obj(){}
public obj(int i){}
obj(float i){}
}