diff --git a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/Annotations.java b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/Annotations.java
new file mode 100644
index 0000000000..5006c5d8d8
--- /dev/null
+++ b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/Annotations.java
@@ -0,0 +1,11 @@
+package com.baeldung.compiletimeconstants;
+
+public class Annotations {
+
+    private final String deprecatedDate = "20-02-14";
+    private final String deprecatedTime = "22:00";
+
+    @Deprecated(since = deprecatedDate + deprecatedTime)
+    public void deprecatedMethod() {}
+
+}
diff --git a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/ClassConstants.java b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/ClassConstants.java
index ad7a5b795e..c903a79ffb 100644
--- a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/ClassConstants.java
+++ b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/ClassConstants.java
@@ -10,6 +10,7 @@ public class ClassConstants {
 
     public static final int MAXIMUM_NUMBER_OF_USERS = 10;
     public static final String DEFAULT_USERNAME = "unknown";
+
     public static final List<String> DEFAULT_GROUPS = List.of("all", "reader");
 
     public static final Logger log = LoggerFactory.getLogger(ClassConstants.class);
diff --git a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/CompileTimeVariables.java b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/CompileTimeVariables.java
index 7db4bf80a5..bb974a46ad 100644
--- a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/CompileTimeVariables.java
+++ b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/CompileTimeVariables.java
@@ -5,16 +5,16 @@ import java.io.PrintWriter;
 public class CompileTimeVariables {
 
     public String ERROR_MESSAGE = ClassConstants.DEFAULT_USERNAME + " not allowed here.";
-    public final int MAXIMUM_LOGIN_ATTEMPTS = 5;
+    public final int maximumLoginAttempts = 5 * 5;
 
     public static void main(String[] args) {
         PrintWriter printWriter = System.console().writer();
-        printWriter.write(ClassConstants.DEFAULT_USERNAME);
+        printWriter.println(ClassConstants.DEFAULT_USERNAME);
 
         CompileTimeVariables instance = new CompileTimeVariables();
-        printWriter.println(instance.MAXIMUM_LOGIN_ATTEMPTS);
+        printWriter.println(instance.maximumLoginAttempts);
 
-        final String username = "baeldung";
+        final String username = "baeldung" + "-" + "user";
         printWriter.println(username);
     }
 
diff --git a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RunTimeVariables.java b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RuntimeVariables.java
similarity index 67%
rename from core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RunTimeVariables.java
rename to core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RuntimeVariables.java
index fe6b0949f6..53e567fe54 100644
--- a/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RunTimeVariables.java
+++ b/core-java-modules/core-java-lang-4/src/main/java/com/baeldung/compiletimeconstants/RuntimeVariables.java
@@ -1,16 +1,16 @@
 package com.baeldung.compiletimeconstants;
 
 import java.io.Console;
-public class RunTimeVariables {
+public class RuntimeVariables {
 
     public static void main(String[] args) {
         Console console = System.console();
 
         final String input = console.readLine();
-        console.writer().write(input);
+        console.writer().println(input);
 
         final double random = Math.random();
-        console.writer().write("Number: " + random);
+        console.writer().println("Number: " + random);
     }
 
 }