Set up Google Guava in Gradle project

I have a silly question about setting up Guava without IDE. My Gradle project's structure is like below.

├── build
├── lib
│   └──guava-31.1-jre.jar
├── build.gradle
└── src
    └── main
        └── java

And file 'build.gradle' is like

plugins {
    id 'application'
}

repositories {
    mavenCentral()
}

dependencies {
    implementation("com.google.guava:guava:31.1-jre")
}

I used command gradle --refresh-dependencies to make sure my dependency has been changed. When I run my project, there still have error package com.google.common does not exist.

Can someone teach the proper way to set up Google Guava? I think I am misunderstood about lots of things. Appreciates.