[Java] IDEA Scala environment construction

Preface

I haven’t written a blog for a long time. Let’s write one for the time being. It’s not for any other reason, but as I write more and more blogs in the past, I feel more and more that a professional blog needs some systematic or refined things. I wrote it before Most of the content is just a running account and lacks depth. It only has breadth, which is far from enough.

Okay, no more gossip. This article mainly records the construction of the IDEA Scala environment.

Installing Scala on Windows

Download the Scala installation package

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Select the required version. https://www.scala-lang.org/download/2.12.17.html
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Download the zip package.

Unzip the zip package. We cd to the corresponding directory and you can see that scala.batit is already an executable file. At this point we can configure environment variables to make use more convenient.

Configure Scala path

First configureSCALA_HOME D:\develop\scala\apps\scala-2.11.12
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Then configure it into path. ( %SCALA_HOME%\bin)
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Test: scala -v
Enter any directory and execute scala -v. You can see the results as shown below.

IDEA settings Scala plug-in & project settings Scala

Install scala plugin

setting -> Plugins -> Scala
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Create a simple Maven project. And add the following dependency packages.

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>scala-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <scala.binary.version>2.11</scala.binary.version>
        <scala.version>2.11.12</scala.version>
    </properties>


    <dependencies>

        <!-- Scala Library, provided by Flink as well. -->
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
            <!--			<scope>provided</scope>-->
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.2</version>
                <executions>
                    <execution>
                        <!-- 声明绑定到maven的compile阶段 -->
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

The main ones are a scala-library. And a scala IDEA plug-in, which allows you to create Scala type files.

Add local scala address
Project Structure --> Global Libraries -> 添加
After joining, you can find that IDEA can load scala Library.

Demo Helloword

Create the scala folder and set it to source root.
Create the corresponding package and set

package com.yanxml.scala.quick

object HelloWorld {
  def main(args: Array[String]): Unit = {
    System.out.print("Hello World")
  }
}

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Reference

[1] IDEA 2020.3.X Detailed tutorial on creating scala environment

[2] How to build the Scala development environment of Intellij idea

[3] IDEA adds scala environment_IDEA builds scala development environment to develop spark applications (sample code)

[4] spark-Build scala programming environment in IDEA

[5] Scala project environment construction in idea

[6] IDEA configures scala development environment