public boolean validarNaoTerminais(String naoTerminal){
naoTerminal = naoTerminal.replace(" ", "");

String parts[] = naoTerminal.split(",");
for(String part : parts){
if(part.isEmpty() || part.length()>1 || part.equals(part.toLowerCase())){
                return false;
            }
        }

        return true;
    }

    public boolean validarTerminais(String terminal){
        terminal = terminal.replace(" ", "");

        String parts[] = terminal.split(",");
        for(String part : parts){
            if(part.isEmpty() || part.length()>1){
                return false;
            }

            if( Character.isLetter(part.charAt(0)) ){
                if( part.equals(part.toUpperCase()) ){
                    return false;
                }
            }
        }

        return true;
    }


public boolean validarInicial(String inicial){
inicial = inicial.replace(" ", "");

if( inicial.isEmpty() || inicial.length()>1 || inicial.equals(inicial.toLowerCase()) ){
            return false;
        }

        return true;
    }