dependency junit:junit4.11 not

found, how can I fix this issue in my Java project?

One way to fix this issue is to add JUnit 4.11 as a dependency in your project's build file or configuration. Depending on your build tool, the syntax may vary, but here are some examples:

For Maven:

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
</dependency>

For Gradle:

dependencies {
    testCompile 'junit:junit:4.11'
}

Make sure to replace `test` with `runtime` if JUnit is needed for your project's main code, not just tests.

If adding the dependency does not resolve the issue, make sure that your build tool can access the repository where JUnit 4.11 is hosted (usually Maven Central).