No obvious way to set JDT settings

I would like to use the "Text Blocks" feature of Java 13. I have the Java 13 JDK installed and that is being picked up correctly by VSCode.

In addition, I have modified my "pom.xml" file to include the "--enable-preview" JVM argument that turns on this feature, like so:

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<jvmArguments>--enable-preview</jvmArguments>
				</configuration>
			</plugin>
		</plugins>
	</build>

I also attempted to edit the .settings/org.eclipse.jdt.core.prefs file and set org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=enabled but any changes to this file are overwritten when the "Clean the java language workspace" task is run

Environment

• Operating System: Linux
• JDK version: 13
• Visual Studio Code version: 1.40.1
• Java extension version: 0.53.1

Steps To Reproduce

1. Create Java project with Java 13
2. Attempt to use Text Block syntax

Current Result

Expected Result

I expect to be able to enable preview features in JDT and for Text Blocks to work with no compiler error

Riproduci l’errore di Text Blocks di Java 13 in un progetto che utilizza la configurazione pom.xml mostrata, quindi esamina come viene generato il file .settings/org.eclipse.jdt.core.prefs quando viene pulito il workspace del linguaggio Java. Il lavoro è completato quando le funzionalità di anteprima rimangono abilitate in JDT e la sintassi di Text Block non produce alcun errore del compilatore.