src/java.base/share/classes/java/lang/Throwable.java

rev 54075 : 8218627: Add detailed message to NullPointerException describing what is null.

@@ -380,10 +380,17 @@
      */
     public String getMessage() {
         return detailMessage;
     }
 
+    /*
+     * Sets the detail message string of this throwable.
+     */
+    void setMessage(String message) {
+        detailMessage = message;
+    }
+
     /**
      * Creates a localized description of this throwable.
      * Subclasses may override this method in order to produce a
      * locale-specific message.  For subclasses that do not override this
      * method, the default implementation returns the same result as