類圖

原始碼

CellPhone.java
package decoratorPattern;

public abstract  class CellPhone {
    public abstract void receiveCall();
}

ComplexPhone.java
package decoratorPattern;

public class ComplexPhone extends PhoneDecorator{

    public ComplexPhone(CellPhone phone) {
        super(phone);
    }
    
 
public void receiveCall() {
        super.receiveCall();
        System.out.println("燈光閃爍提示");
    }

}

JarPhone.java
package decoratorPattern;

public class PhoneDecorator extends CellPhone{

    private CellPhone phone=null;

     public PhoneDecorator(CellPhone phone) {
         if(phone!=null){
             
 
this.phone = phone;
         }else{
             this.phone = new SimplePhone();
         }
     }
    @Override
    public void receiveCall() {
            phone.receiveCall();
    }

}

SimplePhone.java
package decoratorPattern;

public class SimplePhone  extends CellPhone{
    @Override
    public
 
 void receiveCall() {
        System.out.println("聲音提示");
    }
}

PhoneDecorator.java
package decoratorPattern;

public class PhoneDecorator extends CellPhone{

    private CellPhone phone=null;

     public PhoneDecorator(CellPhone phone) {
         if(phone!=null){
             this.phone = phone;
         }else{
             this.phone = new SimplePhone();
         }
     }
    @Override
    public void receiveCall() {
            phone.receiveCall();
    }

}

Client.java
package decoratorPattern;

public class Client {

    public static void main(String a[]){
        CellPhone p1 = new SimplePhone();
        p1.receiveCall();
        System.out.println();
        CellPhone p2 = new JarPhone(p1);
        p2.receiveCall();
        System.out.println();
        CellPhone p3 = new ComplexPhone(p2);
        p3.receiveCall();
    }
}

測試截圖