OpenJdK 8 - Can't compile package javafx.util does not exist

Question

Linux Mint 20.3
   os.name = Linux
   os.arch = amd64
   os.version = 5.13.0-25-generic



 Java : 
    openjdk version "1.8.0_322"
    OpenJDK Runtime Environment (build 1.8.0_322-b06)
    OpenJDK 64-Bit Server VM (build 25.322-b06, mixed mode)

Maven 3.8.3

I build my java project by Maven.

When I try to compile my java project by OpenJdk 1.8.0_322:

  package com.myproject;
    
    import java.util.Collection;
    import java.util.List;
    import java.util.Map;
    
    
    import javafx.util.Pair; //  here error
    
    @SuppressWarnings("rawtypes")
    public interface SomeMyInterface {
      // some code here
      Map<Integer, List<Pair<Integer,Integer>>> findAllMgIdsAssociatedNsPairs();
    }

I get error:

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /SomeMyInterface.java:[10,19] package javafx.util does not exist

P.S. If I use jdk1.8.0_202 from Oracle the project success compile!

P.P.S. The project must be compile by java 8. It's client requirements.