Avoid redundant boxing

See gh-39259

Author: tobias-lippert

Diff for: spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/MeterValue.java

@@ -90,7 +90,7 @@ public static MeterValue valueOf(String value) {
 		if (duration != null) {
 			return new MeterValue(duration);
 		}
-		return new MeterValue(Double.valueOf(value));
+		return new MeterValue(Double.parseDouble(value));
 	}
 
 	/**

Diff for: spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/ConfigurationPropertiesCharSequenceToObjectConverterTests.java

@@ -108,7 +108,7 @@ static class CharSequenceToLongConverter implements Converter<CharSequence, Long
 
 		@Override
 		public Long convert(CharSequence source) {
-			return Long.valueOf(source.toString()) + 1;
+			return Long.parseLong(source.toString()) + 1;
 		}
 
 	}

Diff for: spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/CharSequenceToObjectConverterTests.java

@@ -104,7 +104,7 @@ static class CharSequenceToLongConverter implements Converter<CharSequence, Long
 
 		@Override
 		public Long convert(CharSequence source) {
-			return Long.valueOf(source.toString()) + 1;
+			return Long.parseLong(source.toString()) + 1;
 		}
 
 	}