--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/src/share/classes/jdk/jfr/Configuration.java	2019-01-29 10:58:31.916541425 +0800
@@ -0,0 +1,197 @@
+/*
+ * Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+import jdk.jfr.internal.JVMSupport;
+import jdk.jfr.internal.jfc.JFC;
+
+/**
+ * A collection of settings and metadata describing the configuration.
+ *
+ * @since 9
+ */
+public final class Configuration {
+    private final Map<String, String> settings;
+    private final String label;
+    private final String description;
+    private final String provider;
+    private final String contents;
+    private final String name;
+
+    // package private
+    Configuration(String name, String label, String description, String provider, Map<String, String> settings, String contents) {
+        this.name = name;
+        this.label = label;
+        this.description = description;
+        this.provider = provider;
+        this.settings = settings;
+        this.contents = contents;
+    }
+
+    /**
+     * Returns the settings that specifies how a recording is configured.
+     * <p>
+     * Modifying the returned {@code Map} object doesn't change the
+     * configuration.
+     *
+     * @return settings, not {@code null}
+     */
+    public Map<String, String> getSettings() {
+        return new LinkedHashMap<String, String>(settings);
+    }
+
+    /**
+     * Returns an identifying name (for example, {@code "default" or "profile")}.
+     *
+     * @return the name, or {@code null} if it doesn't exist
+     */
+    public String getName() {
+        return this.name;
+    }
+
+    /**
+     * Returns a human-readable name (for example, {@code "Continuous" or "Profiling"}.
+     *
+     * @return the configuration name, or {@code null} if it doesn't exist
+     */
+    public String getLabel() {
+        return this.label;
+    }
+
+    /**
+     * Returns a short sentence that describes the configuration (for example
+     * {@code "Low
+     * overhead configuration safe for continuous use in production
+     * environments"})
+     *
+     * @return the description, or {@code null} if it doesn't exist
+     */
+    public String getDescription() {
+        return description;
+    }
+
+    /**
+     * Returns who created the configuration (for example {@code "Oracle"}).
+     *
+     * @return the provider, or {@code null} if it doesn't exist
+     */
+    public String getProvider() {
+        return provider;
+    }
+
+    /**
+     * Returns a textual representation of the configuration (for example, the
+     * contents of a JFC file).
+     *
+     * @return contents, or {@code null} if it doesn't exist
+     *
+     * @see Configuration#getContents()
+     */
+    public String getContents() {
+        return contents;
+    }
+
+    /**
+     * Reads a configuration from a file.
+     *
+     * @param path the file that contains the configuration, not {@code null}
+     * @return the read {@link Configuration}, not {@code null}
+     * @throws ParseException if the file can't be parsed
+     * @throws IOException if the file can't be read
+     * @throws SecurityException if a security manager exists and its
+     *         {@code checkRead} method denies read access to the file.
+     *
+     * @see java.io.File#getPath()
+     * @see java.lang.SecurityManager#checkRead(java.lang.String)
+     */
+    public static Configuration create(Path path) throws IOException, ParseException {
+        Objects.requireNonNull(path);
+        JVMSupport.ensureWithIOException();
+        try (Reader reader = Files.newBufferedReader(path)) {
+            return JFC.create(JFC.nameFromPath(path), reader);
+        }
+    }
+
+    /**
+     * Reads a configuration from a reader.
+     *
+     * @param reader a reader that contains the configuration contents, not
+     *        {@code null}
+     * @return a configuration, not {@code null}
+     * @throws IOException if an I/O error occurs while trying to read contents
+     *         from the reader
+     * @throws ParseException if the file can't be parsed
+     */
+    public static Configuration create(Reader reader) throws IOException, ParseException {
+        Objects.requireNonNull(reader);
+        JVMSupport.ensureWithIOException();
+        return JFC.create(null, reader);
+    }
+
+    /**
+     * Returns a predefined configuration.
+     * <p>
+     * See {@link Configuration#getConfigurations()} for available configuration
+     * names.
+     *
+     * @param name the name of the configuration (for example, "default" or
+     *        "profile")
+     * @return a configuration, not {@code null}
+     *
+     * @throws IOException if a configuration with the given name does not
+     *         exist, or if an I/O error occurs while reading the
+     *         configuration file
+     * @throws ParseException if the configuration file can't be parsed
+     */
+    public static Configuration getConfiguration(String name) throws IOException, ParseException {
+        JVMSupport.ensureWithIOException();
+        return JFC.getPredefined(name);
+    }
+
+    /**
+     * Returns an immutable list of predefined configurations for this JVM.
+     *
+     * @return the list of predefined configurations, not {@code null}
+     */
+    public static List<Configuration> getConfigurations() {
+        if (JVMSupport.isNotAvailable()) {
+            return new ArrayList<>();
+        }
+        return Collections.unmodifiableList(JFC.getConfigurations());
+    }
+}