update solid ex

patterns/solid/src/main/java/com/baeldung/d/Keyboard.java

@@ -0,0 +1,4 @@
+package com.baeldung.d;
+
+public interface Keyboard {
+}

patterns/solid/src/main/java/com/baeldung/d/Monitor.java

@@ -0,0 +1,6 @@
+package com.baeldung.d;
+
+public class Monitor {
+
+
+}

patterns/solid/src/main/java/com/baeldung/d/StandardKeyboard.java

@@ -0,0 +1,5 @@
+package com.baeldung.d;
+
+public class StandardKeyboard implements Keyboard {
+
+}

patterns/solid/src/main/java/com/baeldung/d/Windows98Machine.java

@@ -0,0 +1,15 @@
+package com.baeldung.d;
+
+public class Windows98Machine {
+
+  private final StandardKeyboard keyboard;
+  private final Monitor monitor;
+
+  public Windows98Machine() {
+
+    monitor = new Monitor();
+    keyboard = new StandardKeyboard();
+
+  }
+
+}

patterns/solid/src/main/java/com/baeldung/d/Windows98MachineDI.java

@@ -0,0 +1,12 @@
+package com.baeldung.d;
+
+public class Windows98MachineDI {
+
+  private final Keyboard keyboard;
+  private final Monitor monitor;
+
+  public Windows98MachineDI(Keyboard keyboard, Monitor monitor) {
+    this.keyboard = keyboard;
+    this.monitor = monitor;
+  }
+}