Simplify comparison of primitives

Closes gh-23098

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectiveConstructorResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,7 +62,7 @@ public class ReflectiveConstructorResolver implements ConstructorResolver {
 			Arrays.sort(ctors, (c1, c2) -> {
 				int c1pl = c1.getParameterCount();
 				int c2pl = c2.getParameterCount();
-				return (c1pl < c2pl ? -1 : (c1pl > c2pl ? 1 : 0));
+				return Integer.compare(c1pl, c2pl);
 			});
 
 			Constructor<?> closeMatch = null;

spring-expression/src/main/java/org/springframework/expression/spel/support/StandardTypeComparator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2019 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -83,20 +83,16 @@ public class StandardTypeComparator implements TypeComparator {
 				return leftBigInteger.compareTo(rightBigInteger);
 			}
 			else if (leftNumber instanceof Long || rightNumber instanceof Long) {
-				// Don't call Long.compare here - only available on JDK 1.7+
-				return compare(leftNumber.longValue(), rightNumber.longValue());
+				return Long.compare(leftNumber.longValue(), rightNumber.longValue());
 			}
 			else if (leftNumber instanceof Integer || rightNumber instanceof Integer) {
-				// Don't call Integer.compare here - only available on JDK 1.7+
-				return compare(leftNumber.intValue(), rightNumber.intValue());
+				return Integer.compare(leftNumber.intValue(), rightNumber.intValue());
 			}
 			else if (leftNumber instanceof Short || rightNumber instanceof Short) {
-				// Don't call Short.compare here - only available on JDK 1.7+
-				return compare(leftNumber.shortValue(), rightNumber.shortValue());
+				return leftNumber.shortValue() - rightNumber.shortValue();
 			}
 			else if (leftNumber instanceof Byte || rightNumber instanceof Byte) {
-				// Don't call Short.compare here - only available on JDK 1.7+
-				return compare(leftNumber.byteValue(), rightNumber.byteValue());
+				return leftNumber.byteValue() - rightNumber.byteValue();
 			}
 			else {
 				// Unknown Number subtypes -> best guess is double multiplication
@@ -116,21 +112,4 @@ public class StandardTypeComparator implements TypeComparator {
 		throw new SpelEvaluationException(SpelMessage.NOT_COMPARABLE, left.getClass(), right.getClass());
 	}
 
-
-	private static int compare(long x, long y) {
-		return (x < y ? -1 : (x > y ? 1 : 0));
-	}
-
-	private static int compare(int x, int y) {
-		return (x < y ? -1 : (x > y ? 1 : 0));
-	}
-
-	private static int compare(short x, short y) {
-		return x - y;
-	}
-
-	private static int compare(byte x, byte y) {
-		return x - y;
-	}
-
 }