Java代理模式

四、代理模式

/**
* 代理模式
*
*/
public class TestProxy {
public static void main(String[] args) {
Object obj = new ProxyObject();
obj.action();
}
}

interface Object {
void action();
}

class ProxyObject implements Object {
Object obj;

public ProxyObject() {
System.out.println("ProxyObject constructor will new ObjectImpl class.");
obj = new ObjectImpl();
}

@Override
public void action() {
System.out.println("Into ProxyObject's action method.");
obj.action();
}
}

class ObjectImpl implements Object {
@Override
public void action() {
System.out.println("Into ObjectImpl's action method.");
}
}

ProxyObject constructor will new ObjectImpl class.
Into ProxyObject's action method.
Into ObjectImpl's action method.