--- old/src/jdk.compiler/share/classes/com/sun/tools/javac/Main.java	2020-07-27 09:20:38.680000000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/tools/javac/Main.java	2020-07-27 09:20:37.764000000 -0700
@@ -34,6 +34,11 @@
  * module for details on replacement APIs.
  */
 public class Main {
+    /**
+     * Do not call.
+     */
+    @Deprecated(since="16", forRemoval=true)
+    public Main(){}
 
     /** Main entry point for the launcher.
      *  Note: This method calls System.exit.