diff --git a/lib/src/main/java/com/uwyn/urlencoder/UrlEncoder.java b/lib/src/main/java/com/uwyn/urlencoder/UrlEncoder.java
index af10245..06e7978 100644
--- a/lib/src/main/java/com/uwyn/urlencoder/UrlEncoder.java
+++ b/lib/src/main/java/com/uwyn/urlencoder/UrlEncoder.java
@@ -15,7 +15,7 @@ import java.util.BitSet;
  * @author Geert Bevin (gbevin[remove] at uwyn dot com)
  * @since 1.0
  */
-public class UrlEncoder {
+public abstract class UrlEncoder {
     static final BitSet UNRESERVED_URI_CHARS;
     private static final char[] HEX_DIGITS = "0123456789ABCDEF".toCharArray();
 
@@ -61,7 +61,8 @@ public class UrlEncoder {
         char ch;
         byte[] bytes_buffer = null;
         var bytes_pos = 0;
-        for (var i = 0; i < length; ) {
+        var i = 0;
+        while(i < length) {
             ch = source.charAt(i);
 
             if (ch == '%') {
diff --git a/lib/src/test/java/com/uwyn/urlencoder/UrlEncoderTest.java b/lib/src/test/java/com/uwyn/urlencoder/UrlEncoderTest.java
index 56775af..530dd4c 100644
--- a/lib/src/test/java/com/uwyn/urlencoder/UrlEncoderTest.java
+++ b/lib/src/test/java/com/uwyn/urlencoder/UrlEncoderTest.java
@@ -21,7 +21,7 @@ class UrlEncoderTest {
     );
 
     @Test
-    public void testDecodeURL() {
+    void testDecodeURL() {
         assertNull(UrlEncoder.decode(null));
         assertSame(same, UrlEncoder.decode(same));
         validMap.forEach((expected, source) -> assertEquals(expected, UrlEncoder.decode(source)));
@@ -32,7 +32,7 @@ class UrlEncoderTest {
     }
 
     @Test
-    public void testEncodeURL() {
+    void testEncodeURL() {
         assertNull(UrlEncoder.encode(null));
         assertTrue(UrlEncoder.encode("").isEmpty());
         assertSame(same, UrlEncoder.encode(same));