diff -r eb491334113f -r 119ac9128c1b src/java.base/unix/classes/sun/nio/ch/DatagramDispatcher.java
--- a/src/java.base/unix/classes/sun/nio/ch/DatagramDispatcher.java	Fri Oct 25 14:50:16 2019 +0100
+++ b/src/java.base/unix/classes/sun/nio/ch/DatagramDispatcher.java	Fri Oct 25 15:56:35 2019 +0100
@@ -39,7 +39,7 @@
         IOUtil.load();
     }
 
-    int read(FileDescriptor fd, long address, int len) throws IOException {
+    public int read(FileDescriptor fd, long address, int len) throws IOException {
         return read0(fd, address, len);
     }
 
@@ -47,7 +47,7 @@
         return readv0(fd, address, len);
     }
 
-    int write(FileDescriptor fd, long address, int len) throws IOException {
+    public int write(FileDescriptor fd, long address, int len) throws IOException {
         return write0(fd, address, len);
     }
 
@@ -55,11 +55,11 @@
         return writev0(fd, address, len);
     }
 
-    void close(FileDescriptor fd) throws IOException {
+    public void close(FileDescriptor fd) throws IOException {
         FileDispatcherImpl.close0(fd);
     }
 
-    void preClose(FileDescriptor fd) throws IOException {
+    public void preClose(FileDescriptor fd) throws IOException {
         FileDispatcherImpl.preClose0(fd);
     }