He teaches Java courses in classrooms around the world, where his prime objective is to make absolutely sure that none of his students fall asleep.
Dr Heinz M. Kabutz
Dr Heinz M. Kabutz
Heinz Kabutz is the author of The Java Specialists’ Newsletter, a publication enjoyed by tens of thousands of Java experts in over 145 countries. His book “Dynamic Proxies (in German)” was #1 Bestseller on Amazon.de in Fachbücher für Informatik for about five minutes until Amazon fixed their algorithm. Thanks to a supportive mother, he has now sold 5 copies.
Heinz’s Java Specialists’ newsletter is filled with amusing anecdotes of life on the Island of Crete. He is a popular speaker at all the best Java conferences around the world, and also at some of the worst. He teaches Java courses in classrooms around the world, where his prime objective is to make absolutely sure that none of his students fall asleep. He is not always successful.
1. Welcome To The Age Of Monolithic Legacy
1.1 Welcome (1:12)
1.2 Refactoring (3:48)
1.3 Setting Up Your IDE (6:14)
1.4 Building the OFBiz Project (6:32)
1.5 Analyzing Code for Refactoring in IDEA (12:01)
2. Cleaning Up Some Pre-Java 5 Dinosaur Code
2.1 Refactoring to Java 5 (2:04)
2.2 Getting Rid of Unnecessary Boxing:Unboxing (9:37)
2.3 Changing StringBuffer to StringBuilder (1:30)
2.4 String.contains() instead of indexOf() (4:19)
2.5 Replace ‘for’ Loop With Java 5 for-in (9:47)
2.6 Replace ‘while’ Loop With Java 5 for-in (10:22)
3. Moving to Java 7, Our Code is Entering the Age of Mammals
3.1 More Java 5 Refactorings (8:18)
3.2 Java 7 Refactorings, Diamond Operator (5:18)
3.3 Java 7 Collapsing try-catch Blocks (2:38)
3.4 Java 7 Refactoring to try-with-resource (13:11)
4. Fire is Discovered in Lambdas and Method References in Java 8
4.1 Java 8 Static Methods in Interfaces (1:27)
4.2 Java 8 Default Methods in Interfaces (2:04)
4.3 How Functional Interfaces Work (1:58)
4.4 The Four Types of Method References (10:45)
4.5 Refactoring to Iterable.forEach() (4:41)
4.6 Refactoring to use Collection.removeIf() (9:10)
5. Java 8 Streams, We Are Moving Towards the Stone Age
5.1 Introduction to Java 8 Streams (4:43)
5.2 Stream map(), filter(), collect() (4:15)
5.3 Refactoring to Lambdas and Method References (9:54)
5.4 Comparators in Java 8 (23:51)
5.5 Arrays.setAll() (1:59)
5.6 Single Map Methods getOrDefault(), merge(), putIfAbsent() (7:47)
6. Refactoring Our Code to use map()/collect() in the Bronze Age
6.1 Refactoring ContainerConfig.getContainerPropsFromXML() (3:24)
6.2 collect() in UtilCache.values() (1:58)
6.3 map():collect() in UtilDateTime.getTimeZones() (4:03)
6.4 map():collect() in EntityJoinOperator.freeze() (1:35)
6.5 Collection.forEach() in EntityJoinOperator.visit() (0:21)
6.6 map():filter():collect() in EntitytFinderUtil.createCondition() (1:40)
6.7 map():filter():collect() in EntityDataLoader.getUrlByComponentList() (0:39)
6.8 map():collect() in DelegatorContainer.() (1:09)
6.9 map():sum() in OagisShipmentServices.oagisReceiveShowShipment() (4:20)
6.10 Arrays.setAll() in ShoppingListEvents.markCartItemsArray() (3:21)
7. Matching and Finding in Streams, Our Code is Nearing the Iron Age
7.1 Stream all:any:noneMatch() (2:06)
7.2 anyMatch() in MapContext.containsKey() (0:25)
7.3 allMatch() in FileUtil (1:43)
7.4 allMatch() in EntityJoinOperator.isEmpty() (0:24)
7.5 anyMatch() in ModelEntity.getHasFieldWithAuditLog() (0:43)
7.6 allMatch() in ModelEntity.areFields() (0:16)
7.7 collect() in ModelEntity.getFieldNamesFromFieldVector() (0:33)
7.8 anyMatch() in ProductPromoWOrker.hasOrderTotalCondition() (2:16)
7.9 Stream.findFirst:Any (1:57)
7.10 findFirst() in MapContext.get() (4:34)
7.11 Creating Stream from Spliterator in findFirst() in UtilObject.getObjectFromFactory() (3:38)
7.12 findFirst() in ModelRelation (0:58)
7.13 findFirst() in ShoppingCartItem (1:11)
7.14 findFirst() in LoadSale.selectedSale() (4:47)
7.15 Optional in OrderReadHelper.getShippableSizes() (5:00)
8. Finally, We Enter the Information Age (But a Monolithic One)
8.1 distinct() in PaymentGatewayServices.capturePaymentsByInvoice() (3:23)
8.2 filter():collect() in ContainerConfig.getPropertiesWithValue() (2:27)
8.3 map():sum() in UtilCache.getSizeInBytes() (4:23)
8.4 Deep Refactoring in UtilMisc.LocaleHolder.getAvailableLocaleList() (12:22)
8.5 filter():map():collect() in ModelGroupReader.getEntityNamesByGroup() (1:01)
8.6 map():reduce() in InvoiceServices.updatePaymentApplicationDefBd() (3:41)
8.7 Collectors.groupingBy() in ModelReader.rebuildResourceHandlerEntities() (4:58)
8.8 groupingBy():Checked Exception with ModelReader.getEntitiesByPackage() (13:42)
8.9 Creating Own Spliterator for NodeELResolver.getValue() (6:27)
8.10 Conclusion (1:11)
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