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
Expression expression= (Expression) arguments.get(i);
 			ITypeBinding curr= expression.resolveTypeBinding();
			if (curr == null) {
				return null;
			}
			if (!curr.isNullType()) {	
				curr= Bindings.normalizeTypeBinding(curr);
				if (curr == null) {
					curr= expression.getAST().resolveWellKnownType("java.lang.Object"); 
				}
			}
			res[i]= curr;
		}
		return res;
	}
	private static void addQualifierToOuterProposal(IInvocationContext context, MethodInvocation invocationNode, IMethodBinding binding, Collection proposals) throws CoreException {
		ITypeBinding declaringType= binding.getDeclaringClass();
		ITypeBinding parentType= Bindings.getBindingOfParentType(invocationNode);
		ITypeBinding currType= parentType;
		boolean isInstanceMethod= !Modifier.isStatic(binding.getModifiers());
		while (currType != null && !Bindings.isSuperType(declaringType, currType)) {
			if (isInstanceMethod && Modifier.isStatic(currType.getModifiers())) {
				return;
			}
			currType= currType.getDeclaringClass();
		}
		if (currType == null || currType == parentType) {
			return;
		}
		ASTRewrite rewrite= ASTRewrite.create(invocationNode.getAST());