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
if (type == ASTNode.CLASS_INSTANCE_CREATION) {
			ClassInstanceCreation creation= (ClassInstanceCreation) selectedNode;
			IBinding binding= creation.getType().resolveBinding();
			if (binding instanceof ITypeBinding) {
				targetBinding= (ITypeBinding) binding;
				arguments= creation.arguments();
			}
		} else if (type == ASTNode.SUPER_CONSTRUCTOR_INVOCATION) {
			ITypeBinding typeBinding= Bindings.getBindingOfParentType(selectedNode);
			if (typeBinding != null && !typeBinding.isAnonymous()) {
				targetBinding= typeBinding.getSuperclass();
				arguments= ((SuperConstructorInvocation) selectedNode).arguments();
			}
		} else if (type == ASTNode.CONSTRUCTOR_INVOCATION) {
			ITypeBinding typeBinding= Bindings.getBindingOfParentType(selectedNode);
			if (typeBinding != null && !typeBinding.isAnonymous()) {
				targetBinding= typeBinding;
				arguments= ((ConstructorInvocation) selectedNode).arguments();
				recursiveConstructor= ASTResolving.findParentMethodDeclaration(selectedNode).resolveBinding();
			}
		}
		if (targetBinding == null) {
			return;
		}
		IMethodBinding[] methods= targetBinding.getDeclaredMethods();
		ArrayList similarElements= new ArrayList();
		for (int i= 0; i < methods.length; i++) {
			IMethodBinding curr= methods[i];
			if (curr.isConstructor() && recursiveConstructor != curr) {
				similarElements.add(curr);