MyEclipse问题 - 黑马程序员技术交流社区

interface Person{
void show();
void doing();
}
class Student implements Person{
public void show(){
System.out.println("你好，我是学生");
}
public void doing(){
System.out.println("我正在看书");
}
}
class Worker implements Person{
public void show(){
System.out.println("你好，我是工人");
}
public void doing(){
System.out.println("我正在工作");
}
}
class Teacher implements Person{
public void show(){
System.out.println("你好，我是老师");
}
public void doing(){
System.out.println("我正在上课");
}
}
class impFactory{
public static Person factorys() throws InstantiationException, IllegalAccessException, ClassNotFoundException{
Person p=(Person)Class.forName("Student").newInstance();
return p;
}
}
public class Factory {
/**
* @param args
* @throws ClassNotFoundException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public static void main(String[] args) throws InstantiationException, IllegalAccessException, ClassNotFoundException {
Person p=impFactory.factorys();
p.show();
p.doing();
}
}
为什么这些代码在DOS命令行中能通过编译正常运行，而在MyEclipse中却不能通过编译，报出ClassNotFoundException异常？

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