Bug 82940 [quick fix] Missing sensible conversion suggestion
For this code > % cat Test.java import java.util.Collections; import java.util.List; public class Test { interface Wrapper { int doit(); } private static final List<Wrapper> STD_WRAPPERS = Collections.singletonList ((Wrapper)new Wrapper() { public int doit() { return 0; } }); private static final List<Wrapper> STD_WRAPPERS2 = Collections.singletonList (new Wrapper() { public int doit() { return 0; } }); } The value passed Collections.singletonList is actually of the right type so a sensible conversion would be to put in the cast (see the difference between the 2 statics). The current quick fixes offered assume the type being assigned to is wrong (when infact it is right). A useful quick fix would be to cast the parameter to the right type to give the left type (this would help with any 1 arg method of the form X<T> method(T)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/UnresolvedElementsSubProcessor.java
} else {
						label= Messages.format(CorrectionMessages.UnresolvedElementsSubProcessor_changeparamsignature_description, args);
					}
					Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
					ChangeMethodSignatureProposal proposal= new ChangeMethodSignatureProposal(label, targetCU, invocationNode, methodDecl, changeDesc, null, 7, image);
					proposals.add(proposal);
				}
			}
		}
	}
	private static ChangeDescription[] createSignatureChangeDescription(int[] indexOfDiff, int nDiffs, ITypeBinding[] paramTypes, List arguments, ITypeBinding[] argTypes) {
		ChangeDescription[] changeDesc= new ChangeDescription[paramTypes.length];
		for (int i= 0; i < nDiffs; i++) {
			int diffIndex= indexOfDiff[i];
			Expression arg= (Expression) arguments.get(diffIndex);
			String name= arg instanceof SimpleName ? ((SimpleName) arg).getIdentifier() : null;
			ITypeBinding argType= argTypes[diffIndex];
			if (argType.isWildcardType()) {
				argType= ASTResolving.normalizeWildcardType(argType, true, arg.getAST());
				if (argType== null) {
					return null;
				}
			}
			changeDesc[diffIndex]= new EditDescription(argType, name);
		}
		return changeDesc;
	}
	private static ITypeBinding[] getArgumentTypes(List arguments) {
		ITypeBinding[] res= new ITypeBinding[arguments.size()];
		for (int i= 0; i < res.length; i++) {