[cleanup] erefactor/EclipseJdt - Use Autoboxing

EclipseJdt cleanup 'UseAutoboxing' applied by erefactor.

For EclipseJdt see https://www.eclipse.org/eclipse/news/4.19/jdt.php
For erefactor see https://github.com/cal101/erefactor

hutool-core/src/main/java/cn/hutool/core/builder/HashCodeBuilder.java

@@ -938,7 +938,7 @@ public class HashCodeBuilder implements Builder<Integer> {
      */
     @Override
     public Integer build() {
-        return Integer.valueOf(toHashCode());
+        return toHashCode();
     }
 
     /**

hutool-core/src/main/java/cn/hutool/core/codec/Morse.java

@@ -27,8 +27,8 @@ public class Morse {
 	 * @param dict 二进制
 	 */
 	private static void registerMorse(Character abc, String dict) {
-		ALPHABETS.put(Integer.valueOf(abc), dict);
+		ALPHABETS.put((int) abc, dict);
-		DICTIONARIES.put(dict, Integer.valueOf(abc));
+		DICTIONARIES.put(dict, (int) abc);
 	}
 
 	static {

hutool-core/src/main/java/cn/hutool/core/date/format/FormatCache.java

@@ -113,7 +113,7 @@ abstract class FormatCache<F extends Format> {
 	 */
 	// package protected, for access from FastDateFormat; do not make public or protected
 	F getDateTimeInstance(final int dateStyle, final int timeStyle, final TimeZone timeZone, final Locale locale) {
-		return getDateTimeInstance(Integer.valueOf(dateStyle), Integer.valueOf(timeStyle), timeZone, locale);
+		return getDateTimeInstance(dateStyle, timeStyle, timeZone, locale);
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableBool.java

@@ -38,7 +38,7 @@ public class MutableBool implements Comparable<MutableBool>, Mutable<Boolean>, S
 
 	@Override
 	public Boolean get() {
-		return Boolean.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableByte.java

@@ -46,7 +46,7 @@ public class MutableByte extends Number implements Comparable<MutableByte>, Muta
 
 	@Override
 	public Byte get() {
-		return Byte.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableDouble.java

@@ -46,7 +46,7 @@ public class MutableDouble extends Number implements Comparable<MutableDouble>,
 
 	@Override
 	public Double get() {
-		return Double.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableFloat.java

@@ -46,7 +46,7 @@ public class MutableFloat extends Number implements Comparable<MutableFloat>, Mu
 
 	@Override
 	public Float get() {
-		return Float.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableInt.java

@@ -46,7 +46,7 @@ public class MutableInt extends Number implements Comparable<MutableInt>, Mutabl
 
 	@Override
 	public Integer get() {
-		return Integer.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableLong.java

@@ -46,7 +46,7 @@ public class MutableLong extends Number implements Comparable<MutableLong>, Muta
 
 	@Override
 	public Long get() {
-		return Long.valueOf(this.value);
+		return this.value;
 	}
 
 	/**

hutool-core/src/main/java/cn/hutool/core/lang/mutable/MutableShort.java

@@ -46,7 +46,7 @@ public class MutableShort extends Number implements Comparable<MutableShort>, Mu
 
 	@Override
 	public Short get() {
-		return Short.valueOf(this.value);
+		return this.value;
 	}
 
 	/**