diff --git a/core-java-modules/core-java-jar/src/main/java/com/baeldung/jar/MySampleGUIAppn.java b/core-java-modules/core-java-jar/src/main/java/com/baeldung/jar/MySampleGUIAppn.java
index 95f3fff2a3..86d52eed56 100644
--- a/core-java-modules/core-java-jar/src/main/java/com/baeldung/jar/MySampleGUIAppn.java
+++ b/core-java-modules/core-java-jar/src/main/java/com/baeldung/jar/MySampleGUIAppn.java
@@ -5,7 +5,7 @@ import java.awt.*;
 
 import javax.swing.*;
 
-public class MySampleGUIAppn extends JFrame{
+public class MySampleGUIAppn extends JFrame {
     public  MySampleGUIAppn() {
         if (!GraphicsEnvironment.isHeadless()) {
             setSize(300,300);
@@ -20,7 +20,6 @@ public class MySampleGUIAppn extends JFrame{
                     System.exit(0);
                 }
             });
-
         }
         else {
             System.exit(0);
diff --git a/core-java-modules/core-java-jar/src/test/java/com/baeldung/jar/MySampleGUIAppnUnitTest.java b/core-java-modules/core-java-jar/src/test/java/com/baeldung/jar/MySampleGUIAppnUnitTest.java
index 878d65e01d..106531008c 100644
--- a/core-java-modules/core-java-jar/src/test/java/com/baeldung/jar/MySampleGUIAppnUnitTest.java
+++ b/core-java-modules/core-java-jar/src/test/java/com/baeldung/jar/MySampleGUIAppnUnitTest.java
@@ -5,7 +5,6 @@ import java.io.IOException;
 import org.junit.jupiter.api.Test;
 
 class MySampleGUIAppnUnitTest {
-
     @Test
     void testMain() throws IOException {
         System.setProperty("java.awt.headless", "true");