Use parseInt without substring method

spring-context/src/test/java/org/springframework/format/support/FormattingConversionServiceFactoryBeanTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -204,7 +204,7 @@ public class FormattingConversionServiceFactoryBeanTests {
 			return new Parser<Integer>() {
 				@Override
 				public Integer parse(String text, Locale locale) throws ParseException {
-					return Integer.parseInt(text.substring(1));
+					return Integer.parseInt(text, 1, text.length(), 10);
 				}
 			};
 		}