src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Check.java

@@ -3564,10 +3564,24 @@
             log.warning(pos,
                         Warnings.AuxiliaryClassAccessedFromOutsideOfItsSourceFile(c, c.sourcefile));
         }
     }
 
+    /**
+     * 
+     */
+    void checkDefaultConstructor(ClassSymbol c) {
+        // Kick out anonymous and private?
+        if (lint.isEnabled(Lint.LintCategory.DEFAULT_CTOR) &&
+            (c.flags() & ENUM) == 0 &&
+            !c.isAnonymous() &&
+            (c.flags() & PUBLIC) != 0) {
+            System.out.println("Default ctor on " + c);
+        }
+        return;
+    }
+
     private class ConversionWarner extends Warner {
         final String uncheckedKey;
         final Type found;
         final Type expected;
         public ConversionWarner(DiagnosticPosition pos, String uncheckedKey, Type found, Type expected) {