Consolidating Java and Scala in IJ

1, the first need to download Scala plug-ins, note that the plug-in version and the version of IJ closer.

: Https://plugins.jetbrains.com/plugin/1347-scala

2. You will then need to configure the plugin for compiling Scala code and some of Scala's dependency packages in the Maven pom file.

1<?xml version="1.0"encoding="UTF-8"?>2<project xmlns="http://maven.apache.org/POM/4.0.0"3Xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"4xsi:schemalocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">5<modelVersion>4.0.0</modelVersion>6<groupId>com.hxy</groupId>7<artifactId>how2j</artifactId>8<version>1.0-snapshot</version>9 Ten<build> One<plugins> A<plugin> -<!--compiling Java code-- -<groupId>org.apache.maven.plugins</groupId> the<artifactId>maven-compiler-plugin</artifactId> -<version>3.2</version> -<configuration> -<source>1.8</source> +<target>1.8</target> -<encoding>utf-8</encoding> +</configuration> A<executions> at<execution> -<phase>compile</phase> -<goals> -<goal>compile</goal> -</goals> -</execution> in</executions> -</plugin> to<plugin> +<!--compiling Scala code-- -<groupId>net.alchim31.maven</groupId> the<artifactId>scala-maven-plugin</artifactId> *<version>3.2.1</version> $<executions>Panax Notoginseng<execution> -<id>scala-compile-first</id> the<phase>process-resources</phase> +<goals> A<goal>add-source</goal> the<goal>compile</goal> +</goals> -</execution> $</executions> $</plugin> -</plugins> -</build> the  -<dependencies>Wuyi<dependency> the<groupId>junit</groupId> -<artifactId>junit</artifactId> Wu<version>3.8.1</version> -<scope>test</scope> About</dependency> $  -<dependency> -<groupId>junit</groupId> -<artifactId>junit</artifactId> A<version>4.11</version> +</dependency> the  -<dependency> $<groupId>org.hibernate</groupId> the<artifactId>hibernate-validator</artifactId> the<version>4.3.2. Final</version> the</dependency> the  -<dependency> in<groupId>javax.validation</groupId> the<artifactId>validation-api</artifactId> the<version>1.1.0. Final</version> About</dependency> the  the<dependency> the<groupId>org.scala-lang</groupId> +<artifactId>scala-library</artifactId> -<version>2.10.1</version> the</dependency>Bayi  the<dependency> the<groupId>org.scala-lang</groupId> -<artifactId>scala-library</artifactId> -<version>2.12.1</version> the</dependency> the<dependency> the<groupId>org.scala-lang</groupId> the<artifactId>scala-compiler</artifactId> -<version>2.12.1</version> the</dependency> the<dependency> the<groupId>org.scala-lang</groupId>94<artifactId>scala-reflect</artifactId> the<version>2.12.1</version> the</dependency> the<dependency>98<groupId>org.scala-lang</groupId> About<artifactId>scala-actors</artifactId> -<version>2.11.8</version>101</dependency>102<dependency>103<groupId>org.scala-tools</groupId>104<artifactId>maven-scala-plugin</artifactId> the<version>2.15.2</version>106</dependency>107 108</dependencies>109</project>

3. The Java code is placed in the Java directory, and Scala code is placed under the Scala code. A simple Hello World example is as follows.

4. You can call Scala's code in Java code.

5. Summary

The JVM's platform is very powerful, whether it's Java, Kotlin or Scala, but the different languages on these JVMs can eventually be compiled into the same format. class files, and they support mutual invocation, so different scenarios we can

Select the most appropriate language, then call it in another language, and implement the entire software module with glue connection.

Consolidating Java and Scala in IJ