compiletimetypetest.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;
public class CompileTimeTypeTest 
{
	public static void main(String args[]) 
	{
		Stack<Integer> I = new Stack<Integer>(10);
		Stack<Double> D = new Stack<Double>(10);
		//	I = (Stack<Integer>) D; //不能从Stack<Double>强制转换为Stack<Integer>
		Object o = (Object) I;
		D = (Stack<Double>) o;
		D.push(3.14);
		System.out.println(D.pop());
		
		String S = "希赛欢迎您";
		o = (Object) S;
		D = (Stack<Double>) o;
		D.push(3.14);
		System.out.println(D.pop());
	}
}