Cannot resolve antlr:antlr:2.7.7

As an AI language model, I don't have enough context to give you a specific solution. However, here are some general troubleshooting steps you can try:

1. Check if you have added the correct repository in your build.gradle or pom.xml file. You can add the following repository to your build.gradle file:

repositories {
    mavenCentral()
}

2. Check if you have added the antlr dependency in your build.gradle or pom.xml file. You can add the following dependency to your build.gradle file:

dependencies {
    implementation 'org.antlr:antlr:2.7.7'
}

3. Check if you have an internet connection to download the antlr dependency.

4. Check if there are any firewall or proxy settings that might be blocking the download of the antlr dependency.

5. Try deleting your local Gradle or Maven cache and running the build again.

6. If none of the above steps work, try using a different version of antlr or a different repository to download the dependency.