JDK 11 jdk.jfr.jmod is the JMOD file for JDK 11 JFR module.

JDK 11 JFR module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jfr.jmod.

JDK 11 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 JFR module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jfr.

You can click and view the content of each source code file in the list below.

⏎ jdk/jfr/Description.java

/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package jdk.jfr;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Annotation that describes an element by using a sentence or two.
 * <p>
 * Use sentence-style capitalization, capitalize the first letter of the first
 * word, and any proper names such as the word Java. If the description is one
 * sentence, a period should not be included.
 *
 * @since 9
 */
@MetadataDefinition
@Target({ ElementType.TYPE, ElementType.FIELD, ElementType.METHOD })
@Retention(RetentionPolicy.RUNTIME)
public @interface Description {
    /**
     * Returns a sentence or two that describes the annotated element.
     *
     * @return a description, not {@code null}
     */
    String value();
}

⏎ jdk/jfr/Description.java

Or download all of them as a single archive file:

File name: jdk.jfr-11.0.1-src.zip
File size: 237632 bytes
Release date: 2018-11-04
Download 

⇒ JDK 11 jdk.jlink.jmod - JLink Tool

⇐ JDK 11 jdk.jdwp.agent.jmod - JDWP Agent Module

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)