private void replacePanel(javax.swing.JPanel painel) {
        Container contain = grafos[1 + tabbedPainelContainer.getSelectedIndex()].painelCanvas;
        contain.removeAll();
        contain.add(painel);
        validate();
        repaint();
    }

private void botaoMatrizAdjacenteActionPerformed(java.awt.event.ActionEvent evt) {
        if(numGrafos>0)
            replacePanel(grafos[1 + tabbedPainelContainer.getSelectedIndex()].painelAdjacencia);
        else
            JOptionPane.showMessageDialog(null, "Você precisa criar um grafo antes!", "ERRO", JOptionPane.ERROR_MESSAGE);
}