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
addNewMethodProposals(cu, astRoot, sender, arguments, isSuperInvocation, invocationNode, methodName, proposals);
		if (!isOnlyParameterMismatch && !isSuperInvocation && sender != null) {
			addMissingCastParentsProposal(cu, (MethodInvocation) invocationNode, proposals);
		}
		if (!isSuperInvocation && sender == null && invocationNode.getParent() instanceof ThrowStatement) {
			String str= "new ";   
			String label= CorrectionMessages.UnresolvedElementsSubProcessor_addnewkeyword_description;
			int relevance= Character.isUpperCase(methodName.charAt(0)) ? 7 : 4;
			ReplaceCorrectionProposal proposal= new ReplaceCorrectionProposal(label, cu, invocationNode.getStartPosition(), 0, str, relevance);
			proposals.add(proposal);
		}
	}
	private static void addNewMethodProposals(ICompilationUnit cu, CompilationUnit astRoot, Expression sender, List arguments, boolean isSuperInvocation, ASTNode invocationNode, String methodName, Collection proposals) throws JavaModelException {
		ITypeBinding nodeParentType= Bindings.getBindingOfParentType(invocationNode);
		ITypeBinding binding= null;
		if (sender != null) {
			binding= sender.resolveTypeBinding();
		} else {
			binding= nodeParentType;
			if (isSuperInvocation && binding != null) {
				binding= binding.getSuperclass();
			}
		}
		if (binding != null && binding.isFromSource()) {
			ITypeBinding senderDeclBinding= binding.getTypeDeclaration();
			ICompilationUnit targetCU= ASTResolving.findCompilationUnitForBinding(cu, astRoot, senderDeclBinding);
			if (targetCU != null) {
				String label;
				Image image;
				ITypeBinding[] parameterTypes= getParameterTypes(arguments);