Unresolved reference: antlr - build.gradle

Question

When I am importing antlr, as in below
import org.antlr.v4.runtime.*
...
I get the error message saying Unresolved reference: antlr.
Not quite sure if you need this info, but my build.gradle is currently as follows:
plugins {
id 'org.jetbrains.kotlin.jvm' version '1.6.10'
id 'org.jetbrains.intellij' version '1.2.1'
id 'java'
}
group 'me.ylee'
version '1.0-SNAPSHOT'
repositories {
google()
mavenLocal()
mavenCentral()
maven {
url "https://plugins.gradle.org/m2/"
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.6.0"
implementation "org.jetbrains.kotlin:kotlin-compiler-embeddable:1.6.21"
implementation "net.java.dev.jna:jna:5.11.0"
// Dependency on local binaries
implementation fileTree(dir: 'libs', include: ['*.jar'])
}
intellij {
plugins = ['Kotlin', 'java']
}
compileKotlin {
kotlinOptions.jvmTarget = '1.8'
}
compileTestKotlin {
kotlinOptions.jvmTarget = '1.8'
}
How can I successfully import the antlr? Do I need to include antlr somewhere in the build.gradle?
Any help would be appreciated!

Answer 1

I have figured it out. I realized I needed to add antlr-related dependencies as shown in the revised build.gradle as shown below:
plugins {
id 'org.jetbrains.kotlin.jvm' version '1.6.10'
id 'org.jetbrains.intellij' version '1.2.1'
id 'java'
id 'antlr'
}
group 'me.ylee'
version '1.0-SNAPSHOT'
repositories {
google()
mavenLocal()
mavenCentral()
maven {
url "https://plugins.gradle.org/m2/"
}
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
implementation "org.jetbrains.kotlin:kotlin-stdlib:1.6.0"
implementation 'org.jetbrains.kotlin:kotlin-compiler-embeddable:1.6.21'
implementation "net.java.dev.jna:jna:5.11.0"
antlr 'org.antlr:antlr4:4.10.1'
implementation 'org.antlr:antlr4-runtime:4.10.1'
// Dependency on local binaries
implementation fileTree(dir: 'libs', include: ['*.jar'])
}
intellij {
plugins = ['Kotlin', 'java']
}
compileKotlin {
kotlinOptions.jvmTarget = '1.8'
}
compileTestKotlin {
kotlinOptions.jvmTarget = '1.8'
}