Minor refactoring and commenting.

rishiraj88 · rishiraj88 · commit 36eb382c13e4 · 2025-03-18T09:09:16.000+01:00
diff --git a/Java14API/src/main/java/java14/InstanceofPatternMatching.java b/Java14API/src/main/java/java14/InstanceofPatternMatching.java
@@ -2,15 +2,15 @@
 
 public class InstanceofPatternMatching {
 	public static void main(String[] args) {
-		Object user = (Object) "rishiraj";
+		Object user = "rishiraj";
 
 		// Older approach
 		if (user instanceof String) {
 			String userName = (String) user;
 			System.out.println("User name is: " + userName);
 		}
 
-		// Java 14 approach and later
+		// "Java 14 and later" approach
 		if (user instanceof String userName) {
 			System.out.println("User name is: " + userName);
 		}
diff --git a/Java14API/src/main/java/java14/NullPointerExceptionPlus.java b/Java14API/src/main/java/java14/NullPointerExceptionPlus.java
@@ -4,11 +4,17 @@
 
 public class NullPointerExceptionPlus {
 	public static void main(String[] args) {
-		System.out.println(UserProfile.newInstance().getRoleClass().getPrivileges().toString());
+		System.out.println(
+				UserProfile.newInstance().getRoleClass().getPrivileges().toString()
+				/*The following descriptive NPE message is shown in Java 14 and later versions:
+				Exception in thread "main" java.lang.NullPointerException: Cannot invoke "Object.toString()" because the return value of "java14.RoleClass.getPrivileges()" is null
+	at java14.NullPointerExceptionPlus.main(NullPointerExceptionPlus.java:8)
+
+				 */
+		);
 	}
 }
 
-
 class UserProfile {
 
 	public static UserProfile newInstance() {
diff --git a/Java14API/src/main/java/java14/SwitchExpressions.java b/Java14API/src/main/java/java14/SwitchExpressions.java
@@ -10,8 +10,8 @@ public static void main(String[] args) {
 	}
 	
 	static String stateNumberClass(int inputNumber) {
-		// See the beauty and the brevity of code
-		// break; is not needed to exit the switch when a match has been made
+		// See the beauty and the brevity of code:
+		// "break;" is not needed to exit the switch construct when a matching block has been run
 		return switch(inputNumber) {
 		case 0 -> "zero";
 		case 1,3,5,7,9 -> "odd";
diff --git a/Java14API/src/main/java/java14/TextBlockVsString.java b/Java14API/src/main/java/java14/TextBlockVsString.java
@@ -2,6 +2,7 @@
 
 public class TextBlockVsString {
 	public static void main(String[] args) {
+		// Older style
 		String strArbeitgeber = "Das sind die 10 besten Arbeitgeber:innen Deutschlands\n"
 				+ "    Platz 1: dm-drogerie markt GmbH + Co. KG\n"
 				+ "    Platz 2: Techniker Krankenkasse\n"
@@ -16,6 +17,7 @@ public static void main(String[] args) {
 				+ "Viel Glück!\n";
 		System.out.println(strArbeitgeber);
 
+		// "Java 14+" style
 		String tbArbeitgeber = """
 				Das sind die 10 besten Arbeitgeber:innen Deutschlands
 				    Platz 1: dm-drogerie markt GmbH + Co. KG
