Index: CastExpression.java
===================================================================
RCS file: /home/eclipse/org.eclipse.jdt.core/compiler/org/eclipse/jdt/internal/compiler/ast/CastExpression.java,v
retrieving revision 1.53
diff -u -r1.53 CastExpression.java
--- CastExpression.java	7 Feb 2004 16:17:16 -0000	1.53
+++ CastExpression.java	2 Apr 2004 22:41:19 -0000
@@ -167,7 +167,7 @@
 						return false;
 				} else { // a subclass may implement the interface ==> no check at compile time
 					this.bits |= NeedRuntimeCheckCastMASK;
-					return true;
+					return(!expressionType.isCompatibleWith(castType));
 				}
 			}
 			scope.problemReporter().typeCastError(this, castType, expressionType);
@@ -200,7 +200,8 @@
 			if (castType == expressionType) { 
 				return false; // identity conversion
 			}
-			if (Scope.compareTypes(castType, expressionType) == NotRelated) {
+			int comparison = Scope.compareTypes(castType, expressionType); 
+			if (comparison == NotRelated) {
 				MethodBinding[] castTypeMethods = ((ReferenceBinding) castType).methods();
 				MethodBinding[] expressionTypeMethods =
 					((ReferenceBinding) expressionType).methods();
@@ -213,6 +214,9 @@
 							scope.problemReporter().typeCastError(this, castType, expressionType);
 						}
 					}
+			} else if (comparison == MoreGeneric) {
+				// do we really need a runtime check?
+				return false;
 			}
 		}
 		this.bits |= NeedRuntimeCheckCastMASK;