Design Pattern adapter-telephone (original)

Design Pattern adapter-telephone

 

 

 

A friend told me his phone number a few days ago. I copied it to a small piece of paper and put it in a book, later, I did not expect my wife to mail this book to his younger brother. I had no way to contact my friends when I had something important. The book has been mailed, which cannot be changed. It is necessary to call a friend to say something important. These cannot be transferred with my will. What should I do? Fortunately, there is a modern communication tool-Telephone. Can I call my uncle and ask him to tell me why?

 

Let's get started.

 

 

1. Here, we first define a postedbook class:

 

Public class postedbook {

// Obtain the phone number from the book

Public void gettelcodefrombook (){

System. Out. println ("Get the phone number! ");

}

}

2. Define another teltofriend class:

 

Public class teltofriend {

 

Public void telsaything (){

System. Out. println ("important thing! ");

}

}

3. Define the telphone class:

 

Public class telphone extends teltofriend {

Private postedbook;

Public telphone (postedbook) {// call your email

This. postedbook = postedbook;

}

Public void gettelcode () {// obtain the phone number from the email address book

Postedbook. gettelcodefrombook ();

}

}

4. Compile the test class:

 

Public class test {

Public static void main (string ARGs []) {

Postedbook = new postedbook (); // the book to be mailed

Telphone = new telphone (postedbook );

Telphone. gettelcode (); // get a friend's phone number

Telphone. telsaything (); // tell friends about important things

}

 

}

5. Description:

 

A: The adapter mode is used together to combine two irrelevant classes. In this example, the mail book and the phone call to a friend are two irrelevant tasks, it is because of a phone number that can be associated with them, but the premise for obtaining this number is that I have to make a call first, so I have achieved my goal through the phone.

 

B: By calling the coordination class, I got the desired phone number and talked to my friends.