src/java.base/share/classes/java/net/DatagramSocketImpl.java

@@ -56,10 +56,15 @@
  */
 
 public abstract class DatagramSocketImpl implements SocketOptions {
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public DatagramSocketImpl() {}
+
+    /**
      * The local port number.
      */
     protected int localPort;
 
     /**