ex12.java

java 教程源码

interface GrandParent 
{
	void m1();
}
class Parent implements GrandParent
{
	public void m2(GrandParent grandParent)
	{
		grandParent.m1();
	}
	public void m1()
	{
		System.out.println("m1 in Parent");
	}
}
public class Ex12 extends Parent  
{
	public void m1()
	{
		System.out.println("m1 in Child");
	}
	public void m2(GrandParent grandParent)
	{
		grandParent.m1();
	}
	public static void main(String[] args) 
	{
		Ex12 child = new Ex12();
		child.m2(child);
		Parent parent = new Parent();
		child.m2(parent);
		parent.m2(parent);
		parent.m2(child);
	}
}