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
ITypeBinding declaringTypeBinding= Bindings.getBindingOfParentType(selectedNode);
		if (declaringTypeBinding == null) {
			return;
		}
		
		boolean suggestVariableProposals= true;
		int typeKind= 0;
		while (selectedNode instanceof ParenthesizedExpression) {
			selectedNode= ((ParenthesizedExpression) selectedNode).getExpression();
		}
		Name node= null;
		switch (selectedNode.getNodeType()) {
			case ASTNode.SIMPLE_NAME:
				node= (SimpleName) selectedNode;
				ASTNode parent= node.getParent();
				StructuralPropertyDescriptor locationInParent= node.getLocationInParent();
				if (locationInParent == MethodInvocation.EXPRESSION_PROPERTY) {
					typeKind= SimilarElementsRequestor.CLASSES;
				} else if (locationInParent == FieldAccess.NAME_PROPERTY) {
					Expression expression= ((FieldAccess) parent).getExpression();
					if (expression != null) {
						binding= expression.resolveTypeBinding();
						if (binding == null) {
							node= null;
						}
					}
				} else if (parent instanceof SimpleType) {
					suggestVariableProposals= false;
					typeKind= SimilarElementsRequestor.REF_TYPES;
				} else if (parent instanceof QualifiedName) {