JOOQ throws cannot access java.util.concurrent.Flow for version 3.17.2

Question

I'm trying to run a simple example with JOOQ, but It hasn't been possible. I'm using IntelliJ as IDE and making sure that I'm using the correct JDK.

The solution here does not apply since I'm using the JDK 18 and the JOOQ version of 3.17.2.

This is the code snippet:

    public static void connectToDb() {
        String userName = "root";
        String password = "";
        String url = "jdbc:mysql://localhost:3306/javaspark-db";

        try (Connection conn = DriverManager.getConnection(url, userName, password)) {
            DSLContext dslContext = DSL.using(conn, SQLDialect.MYSQL);
            Author AUTHOR = Author.AUTHOR;
            // Getting error just here at select()
            Result<Record> result = dslContext.select().from(AUTHOR).fetch();

            for (Record r : result) {
                Integer id = r.getValue(AUTHOR.ID);
                String firstName = r.getValue(AUTHOR.FIRST_NAME);
                String lastName = r.getValue(AUTHOR.LAST_NAME);

                System.out.println("ID: " + id + " first name: " + firstName + " last name: " + lastName);
            }

        }

        // For the sake of this tutorial, let's keep exception handling simple
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

The error:

/Users/xxxx/xxxx/todo-spark-app/src/main/java/app/Application.java:26:56
java: cannot access java.util.concurrent.Flow
  class file for java.util.concurrent.Flow not found

The maven dependencies:

        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq</artifactId>
            <version>3.17.2</version>
        </dependency>
        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq-meta</artifactId>
            <version>3.17.2</version>
        </dependency>
        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq-codegen</artifactId>
            <version>3.17.2</version>
        </dependency>

The error only shows what you see on the question, it seems it never gets to the catch block. — user2052668, Aug 18 '22 at 02:42
Well, it was a silly mistake after all. My IDE and env vars were all configured to use JAVA18, but my pom.xml file still had 8 as compiler target. I will include an answer. — user2052668, Aug 18 '22 at 03:12

score 1 · Answer 1 · answered Aug 18 '22 at 03:16

Well after all it seems that I forgot to change the maven.compiler.source and target in my pom.xml file.

So in my pom.xml file I changed this:

     <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

To be like this:

     <properties>
        <maven.compiler.source>18</maven.compiler.source>
        <maven.compiler.target>18</maven.compiler.target>
    </properties>

And that got my app running. Silly mistake indeed.

JOOQ throws cannot access java.util.concurrent.Flow for version 3.17.2

1 Answers1