diff -r c3df0f8b6d93 -r b2f0339a4cad src/java.base/unix/classes/sun/nio/ch/NativeThread.java
--- a/src/java.base/unix/classes/sun/nio/ch/NativeThread.java	Tue Oct 29 19:55:34 2019 +0000
+++ b/src/java.base/unix/classes/sun/nio/ch/NativeThread.java	Wed Oct 30 11:53:07 2019 +0000
@@ -37,19 +37,19 @@
 // always returns -1 and the signal(long) method has no effect.
 
 
-class NativeThread {
+public class NativeThread {
 
     // Returns an opaque token representing the native thread underlying the
     // invoking Java thread.  On systems that do not require signalling, this
     // method always returns -1.
     //
-    static native long current();
+    public static native long current();
 
     // Signals the given native thread so as to release it from a blocking I/O
     // operation.  On systems that do not require signalling, this method has
     // no effect.
     //
-    static native void signal(long nt);
+    public static native void signal(long nt);
 
     private static native void init();