c.java

java 教程源码

//c5:C.java
//author:ZhangHongbin 
//This program is protected by copyright laws.
//upcasting of interface.  
interface A 
{
	void f(A a);
}
class C implements A  
{
	public void f(A a)
	{
		System.out.println(" f()");
	}
	public static void main(String[] args)
	{
		C c=new C();
		c.f(c);
	}
}