• Java 에 preview 로 들어간 기능을 실행하려면 컴파일시점과 실행시점에 –enable-preview 옵션을 줘야 한다.

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>13</source>
                <target>13</target>
                <compilerArgs>
                    --enable-preview
                </compilerArgs>
            </configuration>
        </plugin>
    </plugins>
</build>

tasks.withType(JavaCompile) {
    options.compilerArgs += '--enable-preview'
}
tasks.withType(Test) {
    jvmArgs += "--enable-preview"
}

# compile 시
javac --release 13 --enable-preview ClassUsingTextBlocks.java
 
# 실행시
java --enable-preview ClassUsingTextBlocks

• Java Preview Features | Baeldung