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

在使用所示 pom.xml 配置的项目中重现 Java 13 Text Blocks 错误，然后检查清理 Java 语言工作区时如何生成 .settings/org.eclipse.jdt.core.prefs 文件。当 JDT 中的预览功能保持启用，并且 Text Block 语法不产生编译器错误时，即表示完成。