java: package jdk.incubator.foreign is not visible 错误在 Java 15

Question

So I have downloaded JDK 15 - OpenJDK.

Running in Intelij the following code

import jdk.incubator.foreign.MemorySegment;  //The problem seems to occur here in this import

public class Application {

    public static void main(String[] args){

      MemorySegment m = MemorySegment.allocateNative(400L);

   }

 }

In inteliJ I have gone to File -> Project Structure -> Project SDK -> selected 15

In Application configurations (Intelij run project) I have declared JRE 15 (java version 15.0.2)

I receive the following error

C:\Users\repositories\java15project\src\main\untitled\src\Application.java:2:21
java: package jdk.incubator.foreign is not visible
(package jdk.incubator.foreign is declared in module jdk.incubator.foreign, which is not in the module graph)

Could someone please help me?

Answer 1

Run with option --add-modules jdk.incubator.foreign

Alternatively, create a module-info.java file, eg like this:

module my.module.name.here {
    requires jdk.incubator.foreign;
}