bjakupovic - single responsibility principle example (#9191)

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

@@ -0,0 +1,35 @@
+package com.baeldung.s;
+
+public class TextManipulator {
+    private String text;
+
+    public TextManipulator(String text) {
+        this.text = text;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void appendText(String newText) {
+        text = text.concat(newText);
+    }
+
+    public void findWordAndReplace(String word, String replacementWord) {
+        if (text.contains(word)) {
+            text = text.replace(word, replacementWord);
+        } else System.out.println("Word you want to replace is not found in the text");
+    }
+
+    public void findWordAndDelete(String word) {
+        if (text.contains(word)) {
+            text = text.replace(word, "");
+        } else System.out.println("Word you want to delete is not found in the text");
+    }
+
+ /*
+  * Bad practice when implementing SRP principle, not in the scope of this class
+    public void printText() {
+        System.out.println(textManipulator.getText());
+    }*/
+}

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

@@ -0,0 +1,23 @@
+package com.baeldung.s;
+
+import java.util.Arrays;
+
+public class TextPrinter {
+    TextManipulator textManipulator;
+
+    public TextPrinter(TextManipulator textManipulator) {
+        this.textManipulator = textManipulator;
+    }
+
+    public void printText() {
+        System.out.println(textManipulator.getText());
+    }
+
+    public void printOutEachWordOfText() {
+        System.out.println(Arrays.toString(textManipulator.getText().split(" ")));
+    }
+
+    public void printRangeOfCharacters(int startingIndex, int endIndex) {
+        System.out.println(textManipulator.getText().substring(startingIndex, endIndex));
+    }
+}