boundarystack.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter11;
import chapter7.*;
public class BoundaryStack <T extends Animal > extends Stack<T>
{
	public BoundaryStack(int size)
	{
		super(size);
	}
	
	public static void main(String args[])
	{
		
		BoundaryStack<Duck> duckStack = new BoundaryStack<Duck>(5);
		duckStack.push(new Duck());
		Duck duck = duckStack.pop();
		duck.layEgg();
	}
}