Summary

A concise description of the proposed change. The description should be one to two sentences long and written to be reusable in documents aggregating changes for a release.

Problem

A brief description of the problem, optionally including the motivation for developing a solution.

Solution

An overview of the solution. Alternative solutions may be discussed; links to rationale documents or review threads welcome to provide additional background to reviewers.

Specification

diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/AttributeChangeNotificationFilter.java
--- a/src/java.management/share/classes/javax/management/AttributeChangeNotificationFilter.java Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/AttributeChangeNotificationFilter.java Fri Jul 24 21:25:35 2020 -0700
@@ -50,6 +50,10 @@
      */
     private Vector<String> enabledAttributes = new Vector<String>();

+    /**
+     * Constructs an {@code AttributeChangeNotificationFilter}.
+     */
+    public AttributeChangeNotificationFilter() {}

     /**
      * Invoked before sending the specified notification to the listener.
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/DefaultLoaderRepository.java
--- a/src/java.management/share/classes/javax/management/DefaultLoaderRepository.java   Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/DefaultLoaderRepository.java   Fri Jul 24 21:25:35 2020 -0700
@@ -51,6 +51,11 @@
 @Deprecated
 public class DefaultLoaderRepository {
     /**
+     * Constructs an {@code DefaultLoaderRepository}.
+     */
+    public DefaultLoaderRepository() {}
+
+    /**
      * Go through the list of class loaders and try to load the requested class.
      * The method will stop as soon as the class is found. If the class
      * is not found the method will throw a <CODE>ClassNotFoundException</CODE>
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/NotificationFilterSupport.java
--- a/src/java.management/share/classes/javax/management/NotificationFilterSupport.java Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/NotificationFilterSupport.java Fri Jul 24 21:25:35 2020 -0700
@@ -69,6 +69,11 @@


     /**
+     * Constructs a {@code NotificationFilterSupport}.
+     */
+    public NotificationFilterSupport() {}
+
+    /**
      * Invoked before sending the specified notification to the listener.
      * <BR>This filter compares the type of the specified notification with each enabled type.
      * If the notification type matches one of the enabled types,
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/QueryEval.java
--- a/src/java.management/share/classes/javax/management/QueryEval.java Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/QueryEval.java Fri Jul 24 21:25:35 2020 -0700
@@ -42,6 +42,11 @@
         new InheritableThreadLocal<MBeanServer>();

     /**
+     * Constructor for subclasses to call.
+     */
+    public QueryEval() {}
+
+    /**
      * <p>Sets the MBean server on which the query is to be performed.
      * The setting is valid for the thread performing the set.
      * It is copied to any threads created by that thread at the moment
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/loading/DefaultLoaderRepository.java
--- a/src/java.management/share/classes/javax/management/loading/DefaultLoaderRepository.java   Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/loading/DefaultLoaderRepository.java   Fri Jul 24 21:25:35 2020 -0700
@@ -56,6 +56,11 @@
 public class DefaultLoaderRepository {

     /**
+     * Constructs a {@code DefaultLoaderRepository}.
+     */
+    public DefaultLoaderRepository() {}
+
+    /**
      * Go through the list of class loaders and try to load the requested
      * class.
      * The method will stop as soon as the class is found. If the class
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/monitor/Monitor.java
--- a/src/java.management/share/classes/javax/management/monitor/Monitor.java   Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/monitor/Monitor.java   Fri Jul 24 21:25:35 2020 -0700
@@ -76,6 +76,11 @@
     extends NotificationBroadcasterSupport
     implements MonitorMBean, MBeanRegistration {

+    /**
+     * Constructor for subclasses to call.
+     */
+    public Monitor() {}
+
     /*
      * ------------------------------------------
      *  PACKAGE CLASSES
diff -r b3af0bdfb85a src/java.management/share/classes/javax/management/relation/RoleStatus.java
--- a/src/java.management/share/classes/javax/management/relation/RoleStatus.java   Fri Jul 24 13:49:38 2020 -0700
+++ b/src/java.management/share/classes/javax/management/relation/RoleStatus.java   Fri Jul 24 21:25:35 2020 -0700
@@ -33,6 +33,12 @@
  */
 public class RoleStatus {

+    /**
+     * Do not call.
+     */
+    @Deprecated(since="16", forRemoval=true)
+    public RoleStatus() {}
+
     //
     // Possible problems
     //