src/macosx/native/sun/awt/CGraphicsDevice.m

@@ -66,10 +66,15 @@
         CFRelease(modeString);
         if (thisBpp != bpp || (int)CGDisplayModeGetHeight(cRef) != h || (int)CGDisplayModeGetWidth(cRef) != w) {
             // One of the key parameters does not match
             continue;
         }
+
+        if (refrate == 0) { // REFRESH_RATE_UNKNOWN
+            return cRef;
+        }
+
         // Refresh rate might be 0 in display mode and we ask for specific display rate
         // but if we do not find exact match then 0 refresh rate might be just Ok
         if (CGDisplayModeGetRefreshRate(cRef) == refrate) {
             // Exact match
             return cRef;

@@ -163,11 +168,14 @@
                 if (config != NULL) {
                     CFRelease(config);
                 }
             }
         }];
+    } else {
+        [JNFException raise:env as:kIllegalArgumentException reason:"Invalid display mode"];
     }
+    
     CFRelease(allModes);
     JNF_COCOA_EXIT(env);
 }
 
 /*