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lab04 collect input parameters.
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‎lab04_java8/README.md‎

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# Salary Income Predictor
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## Tech stack
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1. java8 stream api
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2. java enum
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3. builder pattern
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## Setup
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```sh
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git clone https://github.com/uniquejava/FSD.git
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cd FSD/lab04_java8
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mvn clean package
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java -cp ./target/*.jar me.cyper.fsd.lab04.SalaryPredictor
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```
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## Sample output
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```sh
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$ java -cp ./target/*.jar me.cyper.fsd.lab04.SalaryPredictor
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Salary Income Predictor
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=================================================
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Input starting salary: 1500
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Input increment in percent: 20
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Input increment received frequency: 2
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Input deductions on income: 200
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Input deductions received frequency: 1
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Input prediction years: 3
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Input parameters
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=================================================
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SalaryInput{startingSalary=1500, incInPercent=20, incFrequency=HALF_YEARLY, decAmount=200, decFrequency=ANNUALLY, years=3}
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```
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## References

‎lab04_java8/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" 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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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>me.cyper.fsd.lab04</groupId>
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<artifactId>salary-predictor</artifactId>
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<version>1.0-SNAPSHOT</version>
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<groupId>me.cyper.fsd.lab04</groupId>
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<artifactId>salary-predictor</artifactId>
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<version>1.0-SNAPSHOT</version>
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<name>salary-predictor</name>
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<!-- FIXME change it to the project's website -->
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<url>http://www.example.com</url>
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<name>salary-predictor</name>
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<url>https://github.com/uniquejava/FSD</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<dependencies>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>22.0</version>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>3.7</version>
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</dependency>
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<build>
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<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
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<plugins>
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<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>3.1.0</version>
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</plugin>
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<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.2</version>
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</plugin>
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<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
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<plugin>
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<artifactId>maven-site-plugin</artifactId>
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<version>3.7.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-project-info-reports-plugin</artifactId>
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<version>3.0.0</version>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.11</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
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<plugins>
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<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
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<plugin>
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<artifactId>maven-clean-plugin</artifactId>
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<version>3.1.0</version>
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</plugin>
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<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
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<plugin>
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<artifactId>maven-resources-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.0</version>
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</plugin>
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<plugin>
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<artifactId>maven-surefire-plugin</artifactId>
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<version>2.22.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.0.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-install-plugin</artifactId>
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<version>2.5.2</version>
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</plugin>
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<plugin>
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<artifactId>maven-deploy-plugin</artifactId>
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<version>2.8.2</version>
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</plugin>
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<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
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<plugin>
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<artifactId>maven-site-plugin</artifactId>
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<version>3.7.1</version>
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</plugin>
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<plugin>
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<artifactId>maven-project-info-reports-plugin</artifactId>
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<version>3.0.0</version>
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</plugin>
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</plugins>
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</pluginManagement>
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</build>
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</project>

‎lab04_java8/src/main/java/me/cyper/fsd/lab04/App.java‎

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‎lab04_java8/src/main/java/me/cyper/fsd/lab04/SalaryPredictor.java‎

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package me.cyper.fsd.lab04;
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import me.cyper.fsd.lab04.model.SalaryInput;
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import me.cyper.fsd.lab04.utils.SalaryInputBuilder;
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/**
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* Salary Income Predictor.
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*/
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public class SalaryPredictor {
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public static void main(String[] args) {
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section("Salary Income Predictor");
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SalaryInput input = new SalaryInputBuilder()
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.collectStartingSalary()
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.collectIncrementInPercent()
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.collectIncrementFrequency()
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.collectDeductionsOnIncome()
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.collectDeductionsFrequency()
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.collectPredictionYears()
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.build();
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section("Input parameters");
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System.out.println(input);
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}
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private static void section(String title) {
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System.out.println();
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System.out.println(title);
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System.out.println("=================================================");
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System.out.println();
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}
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}

‎lab04_java8/src/main/java/me/cyper/fsd/lab04/model/Frequency.java‎

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package me.cyper.fsd.lab04.model;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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public enum Frequency {
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QUARTERLY(4), HALF_YEARLY(2), ANNUALLY(1);
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private final int value;
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private static Map<Integer, Frequency> map = new HashMap<>();
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private Frequency(int value) {
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this.value = value;
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}
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static {
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for (Frequency frequency : Frequency.values()) {
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map.put(frequency.value, frequency);
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}
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}
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public static Frequency valueOf(Integer value) {
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Frequency frequency = map.get(value);
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if (frequency == null) {
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throw new IllegalArgumentException("Incorrect frequency value.");
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}
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return frequency;
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}
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public int getValue() {
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return value;
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}
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public static Set<Integer> getValues() {
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return map.keySet();
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}
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}

‎lab04_java8/src/main/java/me/cyper/fsd/lab04/model/SalaryInput.java‎

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package me.cyper.fsd.lab04.model;
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import java.math.BigDecimal;
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public class SalaryInput {
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private BigDecimal startingSalary;
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private BigDecimal incInPercent;
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private Frequency incFrequency;
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private BigDecimal decAmount;
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private Frequency decFrequency;
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private int years;
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public BigDecimal getStartingSalary() {
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return startingSalary;
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}
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public void setStartingSalary(BigDecimal startingSalary) {
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this.startingSalary = startingSalary;
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}
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public BigDecimal getIncInPercent() {
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return incInPercent;
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}
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public void setIncInPercent(BigDecimal incInPercent) {
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this.incInPercent = incInPercent;
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}
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public Frequency getIncFrequency() {
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return incFrequency;
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}
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public void setIncFrequency(Frequency incFrequency) {
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this.incFrequency = incFrequency;
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}
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public BigDecimal getDecAmount() {
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return decAmount;
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}
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public void setDecAmount(BigDecimal decAmount) {
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this.decAmount = decAmount;
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}
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public Frequency getDecFrequency() {
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return decFrequency;
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}
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public void setDecFrequency(Frequency decFrequency) {
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this.decFrequency = decFrequency;
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}
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public int getYears() {
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return years;
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}
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public void setYears(int years) {
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this.years = years;
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}
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@Override
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public String toString() {
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return "SalaryInput{" +
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"startingSalary=" + startingSalary +
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", incInPercent=" + incInPercent +
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", incFrequency=" + incFrequency +
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", decAmount=" + decAmount +
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", decFrequency=" + decFrequency +
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", years=" + years +
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'}';
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}
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}

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