fix: make class final and constructor private

Author: javaquery

src/main/java/com/javaquery/util/Assert.java

@@ -14,8 +14,7 @@
  */
 public final class Assert {
 
-    private Assert() {
-    }
+    private Assert() {}
 
     /**
      * <em>Assert</em> that {@code object} is {@code not null}.
@@ -27,7 +26,7 @@ private Assert() {
      * @throws NullPointerException if {@code object} is {@code null} and {@code exceptionSupplier} is {@code null}
      */
     public static <T extends Throwable> void nonNull(Object object, Supplier<T> exceptionSupplier) throws T {
-        if (object == null) {
+        if (Objects.isNull(object)) {
             throw exceptionSupplier.get();
         }
     }
@@ -42,7 +41,7 @@ public static <T extends Throwable> void nonNull(Object object, Supplier<T> exce
      * @throws NullPointerException if {@code object} is {@code not null} and {@code exceptionSupplier} is {@code null}
      */
     public static <T extends Throwable> void isNull(Object object, Supplier<T> exceptionSupplier) throws T {
-        if (object != null) {
+        if (Objects.nonNull(object)) {
             throw exceptionSupplier.get();
         }
     }

src/main/java/com/javaquery/util/Objects.java

@@ -4,7 +4,9 @@
  * @author vicky.thakor
  * @since 1.0
  */
-public class Objects {
+public final class Objects {
+
+    private Objects(){}
 
     /**
      * Returns {@code true} if the provided reference is {@code null} otherwise

src/main/java/com/javaquery/util/Regex.java

@@ -6,7 +6,9 @@
  * @author vicky.thakor
  * @since 1.0
  */
-public class Regex {
+public final class Regex {
+
+    private Regex(){}
 
     public static final String REGEX_NUMBER = "^-?[0-9]\\d*(\\.\\d+)?$";
     public static final String REGEX_ALPHA_NUMERIC = "^[a-zA-Z0-9]*$";

src/main/java/com/javaquery/util/collection/Collections.java

@@ -12,7 +12,9 @@
  * @author vicky.thakor
  * @since 1.0
  */
-public class Collections {
+public final class Collections {
+
+    private Collections(){}
 
     /**
      * Returns {@code true} if the provided Collection [List, Set] is {@code null} or empty otherwise

src/main/java/com/javaquery/util/string/Strings.java

@@ -10,7 +10,9 @@
  * @author vicky.thakor
  * @since 1.0
  */
-public class Strings {
+public final class Strings {
+
+    private Strings(){}
 
     private final static String UNSUPPORTED_ASCII_PATTERN = "[^\\x20-\\x7e]";
     private final static String UNSUPPORTED_UNICODE_PATTERN = "[\\uD83C-\\uDBFF\\uDC00-\\uDFFF]+";

src/main/java/com/javaquery/util/time/Dates.java

@@ -12,7 +12,9 @@
  * @author vicky.thakor
  * @since 1.0
  */
-public class Dates {
+public final class Dates {
+
+    private Dates(){}
 
     public static final TimeZone SYSTEM_TIMEZONE = TimeZone.getDefault();
     private static final Calendar CALENDAR = Calendar.getInstance();