Add all 23 GoF design pattern implementations (2026-06-13)

02-structural/bridge/RemoteControl.java

@@ -0,0 +1,33 @@
+package bridge;
+
+/**
+ * Abstraction — the remote control. It holds a reference to a Device
+ * (the "bridge") and delegates all real work to it.
+ *
+ * The key: RemoteControl doesn't care whether it talks to a TV or Radio.
+ * It holds a Device and calls Device methods. That's the bridge.
+ */
+public class RemoteControl {
+
+    // The bridge — link from Abstraction to Implementation
+    protected Device device;
+
+    public RemoteControl(Device device) {
+        this.device = device;
+        System.out.println("Remote paired with: " + device.getName());
+    }
+
+    public void togglePower() {
+        if (device.isEnabled()) {
+            device.disable();
+        } else {
+            device.enable();
+        }
+    }
+
+    public void volumeUp()   { device.setVolume(device.getVolume() + 10); }
+    public void volumeDown() { device.setVolume(device.getVolume() - 10); }
+
+    public void channelUp()   { device.setChannel(device.getChannel() + 1); }
+    public void channelDown() { device.setChannel(device.getChannel() - 1); }
+}