diff --git a/core-java/src/main/java/com/baeldung/string/DoubleToString.java b/java-numbers/src/main/java/com/baeldung/string/DoubleToString.java
similarity index 100%
rename from core-java/src/main/java/com/baeldung/string/DoubleToString.java
rename to java-numbers/src/main/java/com/baeldung/string/DoubleToString.java
diff --git a/core-java/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java b/java-numbers/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java
similarity index 100%
rename from core-java/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java
rename to java-numbers/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java