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‎.gitignore

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### Eclipse ###
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.metadata
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bin/
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tmp/
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*.tmp
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*.bak
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*.swp
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*~.nib
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local.properties
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.settings/
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.loadpath
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.recommenders
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# External tool builders
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.externalToolBuilders/
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# Locally stored "Eclipse launch configurations"
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*.launch
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# PyDev specific (Python IDE for Eclipse)
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*.pydevproject
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# CDT-specific (C/C++ Development Tooling)
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.cproject
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# CDT- autotools
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.autotools
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# Java annotation processor (APT)
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.factorypath
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# PDT-specific (PHP Development Tools)
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.buildpath
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# sbteclipse plugin
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.target
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# Tern plugin
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.tern-project
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# TeXlipse plugin
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.texlipse
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# STS (Spring Tool Suite)
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.springBeans
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# Code Recommenders
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.recommenders/
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# Annotation Processing
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.apt_generated/
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.apt_generated_test/
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# Scala IDE specific (Scala & Java development for Eclipse)
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.cache-main
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.scala_dependencies
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.worksheet
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# Uncomment this line if you wish to ignore the project description file.
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# Typically, this file would be tracked if it contains build/dependency configurations:
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#.project
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### Eclipse Patch ###
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# Spring Boot Tooling
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.sts4-cache/
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### Intellij+all ###
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# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
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# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
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# User-specific stuff
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.idea
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.idea/**/workspace.xml
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.idea/**/tasks.xml
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.idea/**/usage.statistics.xml
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.idea/**/dictionaries
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.idea/**/shelf
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# AWS User-specific
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.idea/**/aws.xml
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# Generated files
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.idea/**/contentModel.xml
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# Sensitive or high-churn files
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.idea/**/dataSources/
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.idea/**/dataSources.ids
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.idea/**/dataSources.local.xml
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.idea/**/sqlDataSources.xml
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.idea/**/dynamic.xml
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.idea/**/uiDesigner.xml
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.idea/**/dbnavigator.xml
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# Gradle
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.idea/**/gradle.xml
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.idea/**/libraries
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# Gradle and Maven with auto-import
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# When using Gradle or Maven with auto-import, you should exclude module files,
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# since they will be recreated, and may cause churn. Uncomment if using
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# auto-import.
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# .idea/artifacts
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# .idea/compiler.xml
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# .idea/jarRepositories.xml
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# .idea/modules.xml
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# .idea/*.iml
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# .idea/modules
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*.iml
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# *.ipr
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# CMake
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cmake-build-*/
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# Mongo Explorer plugin
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.idea/**/mongoSettings.xml
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# File-based project format
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*.iws
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# IntelliJ
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out/
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# mpeltonen/sbt-idea plugin
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.idea_modules/
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# JIRA plugin
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atlassian-ide-plugin.xml
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# Cursive Clojure plugin
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.idea/replstate.xml
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# SonarLint plugin
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.idea/sonarlint/
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# Crashlytics plugin (for Android Studio and IntelliJ)
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com_crashlytics_export_strings.xml
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crashlytics.properties
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crashlytics-build.properties
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fabric.properties
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# Editor-based Rest Client
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.idea/httpRequests
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# Android studio 3.1+ serialized cache file
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.idea/caches/build_file_checksums.ser
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### Intellij+all Patch ###
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# Ignore everything but code style settings and run configurations
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# that are supposed to be shared within teams.
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.idea/*
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!.idea/codeStyles
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!.idea/runConfigurations
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### Java ###
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# Compiled class file
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*.class
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.jar
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*.war
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*.nar
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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replay_pid*
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### Maven ###
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target/
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pom.xml.tag
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pom.xml.releaseBackup
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pom.xml.versionsBackup
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pom.xml.next
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release.properties
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dependency-reduced-pom.xml
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buildNumber.properties
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.mvn/timing.properties
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# https://github.com/takari/maven-wrapper#usage-without-binary-jar
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.mvn/wrapper/maven-wrapper.jar
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# Eclipse m2e generated files
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# Eclipse Core
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.project
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# JDT-specific (Eclipse Java Development Tools)
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.classpath
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### VisualStudioCode ###
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.vscode/*
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!.vscode/settings.json
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!.vscode/tasks.json
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!.vscode/launch.json
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!.vscode/extensions.json
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!.vscode/*.code-snippets
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# Local History for Visual Studio Code
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.history/
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# Built Visual Studio Code Extensions
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*.vsix
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### VisualStudioCode Patch ###
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# Ignore all local history of files
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.history
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.ionide
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‎README.md

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# Nuevas features en Java
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Algunas de las mejoras introducidas en Java desde la versión 8 hasta la LTS 17:
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* Inferencia de tipos
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* Bloques String
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* Herencia sellada
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* Mejoras en interfaces: métodos default, métodos privados, métodos estáticos
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* Expresiones switch
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* Tipos Record

‎pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>org.example</groupId>
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<artifactId>java-new-features</artifactId>
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<version>1.0-SNAPSHOT</version>
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<properties>
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<maven.compiler.source>18</maven.compiler.source>
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<maven.compiler.target>18</maven.compiler.target>
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</properties>
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</project>

‎src/main/java/com/example/interfaces/defaultmethods/EmployeeDAO.java

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package com.example.interfaces.defaultmethods;
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public interface EmployeeDAO {
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String saludo();
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default String despedida() {
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return "Hasta luego";
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}
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}

‎src/main/java/com/example/interfaces/defaultmethods/EmployeeDAOImpl.java

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package com.example.interfaces.defaultmethods;
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public class EmployeeDAOImpl implements EmployeeDAO {
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@Override
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public String saludo() {
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return "Hola mundo";
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}
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@Override
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public String despedida() {
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// return EmployeeDAO.super.despedida();
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return "Hasta nunca";
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}
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}

‎src/main/java/com/example/interfaces/defaultmethods/Main.java

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package com.example.interfaces.defaultmethods;
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public class Main {
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public static void main(String[] args) {
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EmployeeDAO employeeDAO = new EmployeeDAOImpl();
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System.out.println(employeeDAO.saludo());
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System.out.println(employeeDAO.despedida());
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}
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}

‎src/main/java/com/example/interfaces/privatemethods/Calculator.java

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package com.example.interfaces.privatemethods;
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public interface Calculator {
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double IVA = 0.21;
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default double sumPrices(double price1, double price2){
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double totalPrice1 = price1 + calculateIVA(price1);
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double totalPrice2 = price2 + calculateIVA(price2);
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return totalPrice1 + totalPrice2;
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}
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private double calculateIVA(double price){
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return price * IVA;
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}
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}

‎src/main/java/com/example/interfaces/staticmethods/BasicCalculator.java

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package com.example.interfaces.staticmethods;
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public class BasicCalculator implements Calculator {
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@Override
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public int sum(int num1, int num2) {
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return num1 + num2;
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}
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}

‎src/main/java/com/example/interfaces/staticmethods/Calculator.java

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package com.example.interfaces.staticmethods;
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public interface Calculator {
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int sum(int num1, int num2);
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static Calculator getInstance(){
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return new BasicCalculator();
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}
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}

‎src/main/java/com/example/interfaces/staticmethods/Main.java

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package com.example.interfaces.staticmethods;
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public class Main {
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public static void main(String[] args) {
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var calculator = Calculator.getInstance();
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System.out.println(calculator.sum(5, 5));
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}
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}

‎src/main/java/com/example/record/Customer.java

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package com.example.record;
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// Clase normal
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public class Customer {
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private Long id;
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private String name;
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private Double salary;
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public Customer() {
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}
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public Customer(Long id, String name, Double salary) {
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this.id = id;
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this.name = name;
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this.salary = salary;
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}
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Double getSalary() {
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return salary;
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}
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public void setSalary(Double salary) {
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this.salary = salary;
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}
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@Override
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public String toString() {
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return "Customer{" +
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"id=" + id +
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", name='" + name + '\'' +
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", salary=" + salary +
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'}';
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}
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}

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