IntelliJ IDEA 中带有 Gradle 的 Java 项目：无法解析符号“google”，但项目可以编译

Question

I have a toy Java project set up with Gradle in IntelliJ IDEA 13.1.2. It compiles and runs fine, but the IDE highlights 'google' in

import com.google.common.base.Strings;

as red and warns "Cannot resolve symbol 'google'". Any idea how to fix it?

I have tried 1) deleting .idea/ and re-creating the project in IntelliJ IDEA, and 2) re-importing project from the manually created Gradle configuration file build.gradle , but to no avail.

Answer 1

I think user Sap is correct, at least in my case. You should not have to manually add the dependency.

Did you change the dependencies in the gradle file without syncing intellij? Try this button:

For more information, see: https://www.jetbrains.com/idea/help/synchronizing-changes-in-gradle-project-and-intellij-idea-project.html

Answer 2

Check this .

You can simply open Gradle tool window at [ View ] - [ Tool Windows ] - [ Gradle ].

In the window, you can refresh by clicking refresh button.

All dependencies manually added directly into build.gradle file will be resolved.

Answer 3

One of the solutions that worked for me after trying everything listed on the internet to solve this issue was to install the lombok plugin.

Got to File --> Settings --> Plugins and look for Lombok.

Make sure the "Enable annotation processing" is ticked

Answer 4

我的 Gradle 项目使用的是 Intellij 2019.2.3， File->Invalid Cache/Restart...不起作用，但View->Tool Windows->Gradle->sync(the circular icon)立即起作用。

Answer 5

It turns out that the depended packages need to be separately specified in IntelliJ IDEA in addition to build.gradle and explicitly added as a dependency. Namely,

1. download the com.google.guava package following the instruction in documentation -- I picked com.google.guava:guava-base:r03 to download
2. follow the automatically-prompted window to add it as a project library to the Java project.
3. Specify that the Java module depends on the com.google.guava package in the project settings. See the documentation instruction "Configuring Module Dependencies and Libraries" .

Answer 6

In my case, I have to do the following:

• close project
• close idea
• remove .idea project directory
• remove (idea.system.path) directory
• start idea

You can find your idea.system.path here: https://intellij-support.jetbrains.com/hc/en-us/articles/206544519-Directories-used-by-the-IDE-to-store-settings-caches-plugins-and-logs

Answer 7

在我的情况下（Apache Beam 来源）需要一个./gradlew clean 。

Answer 8

在我的案例中，我已经将 Gradle 版本（模块：项目）从 3.2.2 更新到 3.5.2，而且 NDK 文件位置存在问题，它位于错误的路径上，我刚刚将其切换为默认 NDK 路径，然后使项目无效并重新启动。

Answer 9

What helped me was checking "dependencies" in "project settings/modules" section. Apparently, Idea did not pick up them correctly.

Steps which worked for me:

1. delete all modules from "project settings/modules"
2. refresh the project from Gradle plugin - that triggers generation of modules

This trick helped me to get modules with correct dependencies generated. Probably it happened because initially, I imported the project as non-Gradle one.

Answer 10

I was having the wrong import.Check if you have right import. In case you have imported using:

import org.junit.Test 

and you have org.junit.jupiter.api.Test in class path, try importing with :

import org.junit.jupiter.api.Test;