Design Patterns GOF23 adapter mode

Structural model

The central role: is to achieve loose coupling from the structure of the program, thus expanding the overall class structure, to solve bigger problems

Adapter pattern adapter

Examples of real life: converter

Adapter in two ways:

1, class adapter (inherited)

/ ** adapter required object
 * @author sail entering code
 *
 * /
public class the Adaptee {
  public void Request () {
   System.out.println ( "CAN do something");
  }
}

/ **
 * adapter (adapter class)
 * @author sail entering code
 *
 * /
public class the extends the Adaptee the implements the Target Adapter {

 @Override
 public void handleReq() {
   super.request();
 }

}

/ **
 * Client
 * @author sail entering code
 *
 * /
public class Client {
  public void Test (the Target T) {
   t.handleReq ();
  }
  public static void main (String [] args) {
   Client new new = C Client ();
   the Target Adapter new new = T ();
   c.test (T);
  }
}

public interface Target {
  public void handleReq();

}

2, Object Adapter (combined)

/ ** adapter required object
 * @author sail entering code
 *
 * /
public class the Adaptee {
  public void Request () {
   System.out.println ( "CAN do something");
  }
}

/ **
 * Adapter (Object Adapter)
 * @author sail entering code
 *
 * /
public class adapter2 the extends the Adaptee the implements the Target {
 Private the Adaptee A;
 @Override
 public void handleReq () {
   a.request ();
 }
 public adapter2 () {
  
 }
 public adapter2 (the Adaptee A) {
  this.a = A;
 }
}

public class Client2 {
 public void test(Target t) {
  t.handleReq();
 }
 public static void main(String[] args) {
  Client c=new Client();
  Adaptee a=new Adaptee();
  Target t=new Adapter2(a);
  c.test(t);
 }
}

public interface Target {
  public void handleReq();

}