模板设计模式

package cn.idcast4;

public abstract class GetTime {
	public long GetTime() {
		long start = System.currentTimeMillis();
		//code语句必须在start下面，相当于这个语句的的代码
		code();
		long end = System.currentTimeMillis();
		return end - start;
	}
       //模板是抽象的
	public abstract void code();
}

package cn.idcast4;
//要实现的东西必须继承模板
public class ForDemo extends GetTime {

	@Override
	public void code() {
		for (int x = 0; x < 10000; x++) {
			System.out.println(x);
		}
	}

}

package cn.idcast4;

public class GetTimeDemo {
	public static void main(String[] args) {
		GetTime gt = new ForDemo();
		System.out.println(gt.GetTime() + "毫秒");
	}
}