title: Errors when I try to build my Java project in VS Code
body: <p>I'm working with Java in VS Code. I imported time4j lib into my project and when I try to compile the project the errors occur:</p>
  <pre><code>Executing task: gradlew build   -Dorg.gradle.java.home=&quot;C:\Users\Public\wpilib\2020\jdk&quot; &lt;
  
  
  &gt; Task :compileJava FAILED
  D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:5: error: package net.time4j does not exist
  import net.time4j.SystemClock;
                   ^
  D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:6: error: package net.time4j does not exist
  import net.time4j.TemporalType;
                   ^
  D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:43: error: cannot find symbol
          this.clock = TemporalType.CLOCK.from(SystemClock.MONOTONIC);
                                               ^
    symbol:   variable SystemClock
    location: class PID
  D:\Scripts\Java\Java_4\src\main\java\frc\robot\subsystems\PID.java:43: error: package TemporalType does not exist
          this.clock = TemporalType.CLOCK.from(SystemClock.MONOTONIC);
                                   ^
  4 errors
  Compilation Error!
  GradleRIO detected this build failed due to a Compile Error (compileJava).
  Check that all your files are saved, then scroll up in this log for more information.
  
  FAILURE: Build failed with an exception.
  </code></pre>
  <p>But when I was writing the program there was no any errors and time4j was ok!
  I'm new in java and I don't understand what I'm doing wrong. Thanks!</p>