Bridge design pattern - BEFORE CODE

pattern/src/com/premaseem/BridgeRemoteControl.java

@@ -0,0 +1,68 @@
+package com.premaseem;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+public abstract class BridgeRemoteControl {
+
+ private ITV tv;
+
+ public BridgeRemoteControl (ITV tv) {
+ this.tv = tv;
+ }
+
+ public void turnOn () {
+ tv.on();
+ }
+
+ public void turnOff () {
+ tv.off();
+ }
+
+ public void setChannel (int channel) {
+ tv.switchChannel(channel);
+ }
+}
+
+class LogitechRemoteControl extends BridgeRemoteControl {
+ public LogitechRemoteControl (ITV tv) {
+ super(tv);
+ }
+
+ public void setChannelKeyboard (int channel) {
+ setChannel(channel);
+ System.out.println("Logitech use keyword to set channel.");
+ }
+}
+
+class IndependentRemoteControl extends BridgeRemoteControl {
+ public IndependentRemoteControl (ITV tv) {
+ super(tv);
+ }
+
+ public void setChannelKeyboard (int channel) {
+ setChannel(channel);
+ System.out.println("Logitech use keyword to set channel.");
+ }
+}
+
+
+class DependentRemoteControl implements ITV {
+ @Override
+ public void on () {
+ System.out.println(" Forced to change, if TV interface changes ");
+ }
+
+ @Override
+ public void off () {
+ System.out.println(" Forced to change, if TV interface changes ");
+ }
+
+ @Override
+ public void switchChannel (int channel) {
+ System.out.println(" Forced to change, if TV interface changes ");
+ }
+
+}

pattern/src/com/premaseem/Client.java

@@ -8,6 +8,12 @@
 */
 public class Client {
  public static void main (String[] args) {
- System.out.println("Singleton cook example ");
+ System.out.println("Bridge cook example ");
+ ITV tv = new SonyTV();
+ // DependentRemoteControl sub classes TV interface
+ // and is forced to change even with minor changes in TV interface
+ DependentRemoteControl remote = new DependentRemoteControl();
+ remote.on();
+ remote.switchChannel(23);
  }
 }

pattern/src/com/premaseem/ITV.java

@@ -0,0 +1,50 @@
+package com.premaseem;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+public interface ITV {
+ public void on ();
+
+ public void off ();
+
+ public void switchChannel (int channel);
+}
+
+class SamsungTV implements ITV {
+ @Override
+ public void on () {
+ System.out.println("Samsung is turned on.");
+ }
+
+ @Override
+ public void off () {
+ System.out.println("Samsung is turned off.");
+ }
+
+ @Override
+ public void switchChannel (int channel) {
+ System.out.println("Samsung: channel - " + channel);
+ }
+}
+
+class SonyTV implements ITV {
+
+ @Override
+ public void on () {
+ System.out.println("Sony is turned on.");
+ }
+
+ @Override
+ public void off () {
+ System.out.println("Sony is turned off.");
+ }
+
+ @Override
+ public void switchChannel (int channel) {
+ System.out.println("Sony: channel - " + channel);
+ }
+}