Improve your Java applications in IntelliJ IDEA @anabneri 

Ana Beatriz Neri Software Engineer - Itaú Bank @anabneri /in/anabeatrizdev anabneri.github.io 

Spoilers(); Compilation Process What is JVM? JVM Architecture Memory Manager JVM inside of IntelliJ MVN Verify #VM Properties #TODO files #Refactoring #Rename Types #GIT #Tests #Maven Dependencies #Generated.. @anabneri 

Wait… What I need to know all of this??? 

ALERT! This talk have concepts for Junior, Intermediate and Advanced Developers :p I love memes, so sometimes I put some gifs :D Make questions, enjoy and let’s have learning together 

Compilation Process 

C 0101010101 0101010011 0100101010 0101010101 0101010101 0100101010 0101010101 0101010011 0100101010 0101010101 0101010101 0100101010 @anabneri 

JavaC JVM JAVA BYTECO DE @anabneri 

What is JVM? 

What is JVM? JVM ≠ JDK ≠ JRE JDK (Java Development Kit), and the java development kit, which is responsible for compiling .java code for bytecode @anabneri 

What is JVM? JVM ≠ JDK ≠ JRE JRE (Java Runtime Environment), Java execution environment, in which it provides Java libraries for the JDK to compile your code and the JVM to run your program @anabneri 

What is JVM? JVM ≠ JDK ≠ JRE JVM (Java Virtual Machine), java virtual machine responsible for executing the .byetcode file @anabneri 

JDK Java Virtual Machine JRE Basics Libraries (Java API) Execution Engines Development Tools @anabneri 

JVM Architecture 

Class loader subsystem Method area Heap Java stacks PC Registers Native Method Stacks Execution engine Native Method Interface Native Methods libraries Runtime data areas Class files @anabneri 

Memory Manager 

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EDEN SO SO1 TENURED PERMANENT New Memory (Young Generation) Survival space Old Memory Garbage Collector @anabneri 

JVM inside of IntelliJ @anabneri 

JVM inside of IntelliJ We can improve: .VM properties JVM options Memory Large LET’S SEE HOW EASY IT’S @anabneri 

VM properties Configuring the VM in your development IDE is essential for your code to run in a way that doesn’t impact anything, we will see later on how everything around the JVM makes everything as responsive as possible. @anabneri When it’s necessary change? 

MVN Verify It’s like: mvn clean & mvn install We can use in situations of build java projects, it’s not a thing it’s not a feature of intellij but it’s a form of build that can help us improve our applications @anabneri 

Generated You can Generate: - Getters and Setters - Hash() and Equals() methods - toString() - Generate custom templates for codes @anabneri 

TODO files IntelliJ IDEA allows you to add special types of comments highlighted in the editor, indexed and listed in the TODO tool window. @anabneri 

TODO files TODO and FIXME in both lower and upper case. These patterns can be used inside line and block comments of any supported file type. You can modify the default patterns or add your own patterns if necessary. @anabneri 

Refactoring Rename TODO and FIXME in both lower and upper case. These patterns can be used inside line and block comments of any supported file type. You can modify the default patterns or add your own patterns if necessary. @anabneri 

Refactoring Rename Use the Rename refactoring to change names of symbols, files, directories, packages, modules and all the references to them throughout code. When you rename methods that are declared in interfaces, you can also review and rename their implementations as well. The refactoring changes are displayed on the Refactoring Preview tab in the Find tool window. @anabneri 

GIT✨ You use for default, don’t need to install any plugin Selecting the src file to adding all the dependencies necessary @anabneri 

Maven Dependencies If you create some project from zero, you can adding a dependency in: project structure > libraries > click in “+” > and type the name of some dependencies if you need to add and DONE @anabneri 

Let’s keep in touch! @anabneri all the social medias /in/anabeatrizdev anabneri.github.io