Polish Collection.toArray

Consistently use `StringUtils.toStringArray`, `ClassUtils.toClassArray`
or zero length when converting collections to arrays.

Fixes gh-12160

spring-boot-samples/spring-boot-sample-jooq/src/main/java/sample/jooq/JooqExamples.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2018 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.
@@ -65,7 +65,7 @@ public class JooqExamples implements CommandLineRunner {
 		Query query = this.dsl.select(BOOK.TITLE, AUTHOR.FIRST_NAME, AUTHOR.LAST_NAME)
 				.from(BOOK).join(AUTHOR).on(BOOK.AUTHOR_ID.equal(AUTHOR.ID))
 				.where(BOOK.PUBLISHED_IN.equal(2015));
-		Object[] bind = query.getBindValues().toArray(new Object[] {});
+		Object[] bind = query.getBindValues().toArray(new Object[0]);
 		List<String> list = this.jdbc.query(query.getSQL(), bind,
 				new RowMapper<String>() {
 					@Override