1. abstract class implementing interfaces-adapter; 2. Proxy company method-more powerful packaging class; 3. Use of interfaces-factory mode, more powerful Factory

1. abstract class implementing interfaces-adapter; 2. Proxy company method-more powerful packaging class; 3. Use of interfaces-factory mode, more powerful Factory

1. abstract class implementing interfaces-adapter

That is, the interface and abstract class are used. The key is Window win = new MyWindow ();

The MyWindow subclass does not directly implement the Window interface, but builds a bridge through the abstract class in the middle.

 

 

2. proxy companies-more powerful Packaging

Your ability to ask for money is too weak. You can use a powerful agent to complete money and packaging.

 

 

3. Use of interfaces-factory Mode

Add a judgment in the Demo class. If there is any input, execute the fruit.