private static void addProposal( Identifier identifier, Collection<ICompletionProposal> proposals, IFile file) { String oldIdentifier = identifier.getText(); int first = oldIdentifier.codePointAt(0); int newFirst = isUpperCase(first) ? toLowerCase(first) : toUpperCase(first); String newFirstLetter = new String(toChars(newFirst)); String newIdentifier = newFirstLetter + oldIdentifier.substring(charCount(first)); TextFileChange change = new TextFileChange("Change initial case of identifier", file); change.setEdit(new ReplaceEdit(identifier.getStartIndex(), 1, newFirstLetter)); ChangeInitialCaseOfIdentifierInDeclaration proposal = new ChangeInitialCaseOfIdentifierInDeclaration(newIdentifier, change); if (!proposals.contains(proposal)) { proposals.add(proposal); } }