remove class

hutool-core/src/main/java/cn/hutool/core/comparator/ComparableComparator.java

@@ -1,53 +0,0 @@
-package cn.hutool.core.comparator;
-
-import java.io.Serializable;
-import java.util.Comparator;
-
-/**
- * 针对 {@link Comparable}对象的默认比较器
- *
- * @param <E> 比较对象类型
- * @author Looly
- * @since 3.0.7
- */
-public class ComparableComparator<E extends Comparable<? super E>> implements Comparator<E>, Serializable {
-	private static final long serialVersionUID = 3020871676147289162L;
-
-	/** 单例 */
-	@SuppressWarnings("rawtypes")
-	public static final ComparableComparator INSTANCE = new ComparableComparator<>();
-
-	/**
-	 * 构造
-	 */
-	public ComparableComparator() {
-	}
-
-	/**
-	 * 比较两个{@link Comparable}对象
-	 *
-	 * <pre>
-	 * obj1.compareTo(obj2)
-	 * </pre>
-	 *
-	 * @param obj1 被比较的第一个对象
-	 * @param obj2 the second object to compare
-	 * @return obj1小返回负数，大返回正数，否则返回0
-	 * @throws NullPointerException obj1为{@code null}或者比较中抛出空指针异常
-	 */
-	@Override
-	public int compare(final E obj1, final E obj2) {
-		return obj1.compareTo(obj2);
-	}
-
-	@Override
-	public int hashCode() {
-		return "ComparableComparator".hashCode();
-	}
-
-	@Override
-	public boolean equals(final Object object) {
-		return this == object || null != object && object.getClass().equals(this.getClass());
-	}
-
-}

hutool-core/src/main/java/cn/hutool/core/comparator/CompareUtil.java

@@ -1,7 +1,7 @@
 package cn.hutool.core.comparator;
 
-import java.lang.reflect.Array;
-import java.util.Collection;
+import cn.hutool.core.util.ArrayUtil;
+
 import java.util.Comparator;
 import java.util.Objects;
 import java.util.function.Function;
@@ -98,19 +98,50 @@ public class CompareUtil {
 	 *
 	 * <ul>
 	 *     <li>如需对null友好操作如下</li>
-	 *     <li><code>Comparator.nullsFirst(Comparator.naturalOrder())</code></li>
-	 *     <li><code>Comparator.nullsLast(Comparator.naturalOrder())</code></li>
-	 *     <li><code>Comparator.nullsLast(CompareUtil.naturalComparator())</code></li>
-	 *     <li><code>Comparator.nullsFirst(CompareUtil.naturalComparator())</code></li>
+	 *     <li><code>Comparator.nullsLast(CompareUtil.natural())</code></li>
+	 *     <li><code>Comparator.nullsFirst(CompareUtil.natural())</code></li>
 	 * </ul>
 	 *
 	 * @param <E> 排序节点类型
 	 * @return 默认排序器
 	 * @since 5.7.21
 	 */
-	@SuppressWarnings("unchecked")
-	public static <E extends Comparable<? super E>> Comparator<E> naturalComparator() {
-		return ComparableComparator.INSTANCE;
+	public static <E extends Comparable<? super E>> Comparator<E> natural() {
+		return Comparator.naturalOrder();
+	}
+
+	/**
+	 * 获取反序排序器，即默认自然排序的反序排序器
+	 *
+	 * <ul>
+	 *     <li>如需对null友好操作如下</li>
+	 *     <li><code>Comparator.nullsLast(CompareUtil.naturalReverse())</code></li>
+	 *     <li><code>Comparator.nullsFirst(CompareUtil.naturalReverse())</code></li>
+	 * </ul>
+	 *
+	 * @param <E> 排序节点类型
+	 * @return 默认排序器
+	 * @since 6.0.0
+	 */
+	public static <E extends Comparable<? super E>> Comparator<E> naturalReverse() {
+		return Comparator.reverseOrder();
+	}
+
+	/**
+	 * 获取反序排序器，即默认排序器
+	 *
+	 * <ul>
+	 *     <li>如需对null友好操作如下</li>
+	 *     <li><code>Comparator.nullsLast(CompareUtil.reverse())</code></li>
+	 *     <li><code>Comparator.nullsFirst(CompareUtil.reverse())</code></li>
+	 * </ul>
+	 *
+	 * @param <E> 排序节点类型
+	 * @return 默认排序器
+	 * @since 6.0.0
+	 */
+	public static <E extends Comparable<? super E>> Comparator<E> reverse(final Comparator<E> comparator) {
+		return null == comparator ? naturalReverse() : comparator.reversed();
 	}
 
 	/**
@@ -255,7 +286,6 @@ public class CompareUtil {
 	 * @return 索引比较器
 	 * @since 5.8.0
 	 */
-	@SuppressWarnings("unchecked")
 	public static <T, U> Comparator<T> comparingIndexed(final Function<? super T, ? extends U> keyExtractor, final U[] objs) {
 		return comparingIndexed(keyExtractor, false, objs);
 	}
@@ -273,12 +303,8 @@ public class CompareUtil {
 	 * @since 6.0.0
 	 */
 	@SuppressWarnings("unchecked")
-	public static <T, U> Comparator<T> comparingIndexed(final Function<? super T, ? extends U> keyExtractor, final Collection<U> objs) {
-		U[] array = null;
-		if (objs != null && objs.size() > 0) {
-			array = objs.toArray((U[]) Array.newInstance(objs.iterator().next().getClass(), objs.size()));
-		}
-		return comparingIndexed(keyExtractor, false, array);
+	public static <T, U> Comparator<T> comparingIndexed(final Function<? super T, ? extends U> keyExtractor, final Iterable<U> objs) {
+		return comparingIndexed(keyExtractor, false, ArrayUtil.toArray(objs, (Class<U>) objs.iterator().next().getClass()));
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/comparator/ReverseComparator.java

@@ -1,49 +0,0 @@
-package cn.hutool.core.comparator;
-
-import java.io.Serializable;
-import java.util.Comparator;
-
-/**
- * 反转比较器
- *
- * @author Looly
- *
- * @param <E> 被比较对象类型
- */
-public class ReverseComparator<E> implements Comparator<E>, Serializable {
-	private static final long serialVersionUID = 8083701245147495562L;
-
-	/** 原始比较器 */
-	private final Comparator<? super E> comparator;
-
-	@SuppressWarnings("unchecked")
-	public ReverseComparator(final Comparator<? super E> comparator) {
-		this.comparator = (null == comparator) ? ComparableComparator.INSTANCE : comparator;
-	}
-
-	//-----------------------------------------------------------------------------------------------------
-	@Override
-	public int compare(final E o1, final E o2) {
-		return comparator.compare(o2, o1);
-	}
-
-	@Override
-	public int hashCode() {
-		return "ReverseComparator".hashCode() ^ comparator.hashCode();
-	}
-
-	@Override
-	public boolean equals(final Object object) {
-		if (this == object) {
-			return true;
-		}
-		if (null == object) {
-			return false;
-		}
-		if (object.getClass().equals(this.getClass())) {
-			final ReverseComparator<?> thatrc = (ReverseComparator<?>) object;
-			return comparator.equals(thatrc.comparator);
-		}
-		return false;
-	}
-}

hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java

@@ -14,7 +14,6 @@ import java.lang.reflect.Array;
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
@@ -1307,22 +1306,8 @@ public class ArrayUtil extends PrimitiveArrayUtil {
 	 * @since 3.0.9
 	 */
 	public static <T> T[] toArray(final Iterable<T> iterable, final Class<T> componentType) {
-		return toArray(CollUtil.toCollection(iterable), componentType);
+		return CollUtil.toCollection(iterable).toArray(newArray(componentType, 0));
 	}
-
-	/**
-	 * 将集合转为数组
-	 *
-	 * @param <T>           数组元素类型
-	 * @param collection    集合
-	 * @param componentType 集合元素类型
-	 * @return 数组
-	 * @since 3.0.9
-	 */
-	public static <T> T[] toArray(final Collection<T> collection, final Class<T> componentType) {
-		return collection.toArray(newArray(componentType, 0));
-	}
-
 	// ---------------------------------------------------------------------- remove
 
 	/**

hutool-json/src/main/java/cn/hutool/json/JSONConfig.java

@@ -75,7 +75,7 @@ public class JSONConfig implements Serializable {
 	 * @since 5.7.21
 	 */
 	public JSONConfig setNatureKeyComparator() {
-		return setKeyComparator(CompareUtil.naturalComparator());
+		return setKeyComparator(CompareUtil.natural());
 	}
 
 	/**