Dynamic PanelGrid JSF

I have an application that needs to have a dynamic panel, I was able to create and display the screen and put the values from the database, but I can not get the values of the inputnumber if the user modifies, my question is how do I get these values? Below is the panel creation with input and output

public void criarPainelBoleto() {
    panelBoleto = new PanelGrid();

    panelBoleto.setColumns(2);

    OutputLabel opcoes = (OutputLabel) FacesContext.getCurrentInstance().getApplication()
            .createComponent(OutputLabel.COMPONENT_TYPE);
    OutputLabel descontos = (OutputLabel) FacesContext.getCurrentInstance().getApplication()
            .createComponent(OutputLabel.COMPONENT_TYPE);

    opcoes.setValue("Opções de Pagamento");
    descontos.setValue("Descontos (%)");
    opcoes.setStyle("font-weight:bold");
    descontos.setStyle("font-weight:bold");
    panelBoleto.getChildren().add(opcoes);
    panelBoleto.getChildren().add(descontos);
    if (listaDescontosEComissoesBoleto.size() != 0) {
        for (int i = 1; i <= listaDescontosEComissoesBoleto.size(); i++) {
            OutputLabel outputLabel = (OutputLabel) FacesContext.getCurrentInstance().getApplication()
                    .createComponent(OutputLabel.COMPONENT_TYPE);
            InputNumber inputNumber = (InputNumber) FacesContext.getCurrentInstance().getApplication()
                    .createComponent(InputNumber.COMPONENT_TYPE);

            inputNumber.setSymbol(Mensagens.get().getString("comum.pe.inputnumber.percent.symbol"));
            inputNumber
                    .setSymbolPosition(Mensagens.get().getString("comum.pe.inputnumber.percent.symbol.position"));
            inputNumber.setMaxValue("99.99");
            inputNumber.setRequired(true);
            inputNumber.setRequiredMessage(
                    Mensagens.get().getString("painel.configuracoes.cliente.parcela.boleto.obrigatoria"));
            int posicao = i-1;
            inputNumber.setValue(listaDescontosEComissoesBoleto.get(posicao).getPercentualDesconto());

            if (i == 1) {
                outputLabel.setValue("Pagamento à vista");

            } else {
                outputLabel.setValue("Pagamento em " + i + " vezes");
            }

            panelBoleto.getChildren().add(outputLabel);
            panelBoleto.getChildren().add(inputNumber);

        }
    }
}