update solid ex

patterns/solid/src/main/java/com/baeldung/s/BadBook.java

@@ -0,0 +1,27 @@
+package com.baeldung.s;
+
+public class BadBook {
+
+  private String name;
+  private String author;
+  private String text;
+
+  //constructor, getters and setters
+
+
+  //methods that directly relate to the book properties
+  public String replaceWordInText(String word){
+    return text.replaceAll(word, text);
+  }
+
+  public boolean isWordInText(String word){
+    return text.contains(word);
+  }
+
+  //methods for outputting text to console - should this really be here?
+  void printTextToConsole(){
+    //our code for formatting and printing the text
+  }
+
+
+}

patterns/solid/src/main/java/com/baeldung/s/BookPrinter.java

@@ -0,0 +1,13 @@
+package com.baeldung.s;
+
+public class BookPrinter {
+
+  //methods for outputting text
+  void printTextToConsole(String text){
+    //our code for formatting and printing the text
+  }
+
+  void printTextToAnotherMedium(String text){
+    //code for writing to any other location..
+  }
+}

patterns/solid/src/main/java/com/baeldung/s/GoodBook.java

@@ -0,0 +1,20 @@
+package com.baeldung.s;
+
+public class GoodBook {
+
+  private String name;
+  private String author;
+  private String text;
+
+  //constructor, getters and setters
+
+  //methods that directly relate to the book properties
+  public String replaceWordInText(String word){
+    return text.replaceAll(word, text);
+  }
+
+  public boolean isWordInText(String word){
+    return text.contains(word);
+  }
+
+}