zhi pian man tian fei

	public static void main(String[] args) {

		// exTest();
		try {
			int result = div(10, 0);
			System.out.println(result);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private static int div(int num1, int num2) throws Exception {
		if (num2 == 0)
			throw new ArithmeticException("除数不能为0");
		return num1 / num2;

	}

    private static class MyHandler extends Handler{
        private final WeakReference weakReference;
        public MyHandler(MainActivity mainActivity){
            weakReference = new WeakReference(mainActivity);
        }
        @Override
        public void handleMessage(Message msg) {
            MainActivity mainActivity = weakReference.get();
            if(mainActivity!=null){
                switch (msg.what){
                    case LOAD_SUCESS:
                        mainActivity.iv.setImageBitmap((Bitmap) msg.obj);
                        break;
                }
            }
        }
    }

//静态代码
//代理设计模式

public class Test11{
	public static void main(String[] args){
		SuperMan man = new SuperMan();
		Proxy proxy = new Proxy(man);
		proxy.shopping();
	}
}

interface Subject{//主题
	public void shopping();
}

//被代理人
class SuperMan implements Subject{
	private String name;
	public void shopping(){
		//在买 之前要做大量的评估工作
		//......
		System.out.println("为媳妇从网络上购买进口化妆品，老贵了");
	}
}

//代理人
class Proxy implements Subject{
	private Subject target;//被代理人
	public Proxy(Subject target){
		this.target = target;
	}
	//实现接口的方法
	public void shopping(){
		//代购之前要做的事情
		System.out.println("做大量的商品专业评估");
		target.shopping();//被代理人真正的业务
		
		//代购之后要做的事情
		System.out.println("代购之后的客户满意度调查");
	}
}