Insertion, Query, with BD Class

Good evening. I'm developing a college work, which asked me to create a Student class, implement a graphical interface, with name, address, course options, choice list and etc, and make it quit, query, and save button. p>

However,thequestionasksmetocreateaBDAlunoclassthatimplementsaCollectiontogroupasetofStudentobjectsandmanipulatesthem,butIdonotknowhowtodothat.

Cananyonehelpme?

Basically,getthisinformationandplayfortheBDAlunoclass:

privatevoidjGravarActionPerformed(java.awt.event.ActionEventevt){this.txtCidade.setEnabled(true);this.jConsultar.setEnabled(false);this.jSair.setEnabled(true);this.jGravar.setEnabled(false);StringNome=txtNome.getText();StringEndereco=txtEndereco.getText();StringCidade=txtCidade.getText();StringEstado=jEstado.getUIClassID();StringSexo="";
            if(rdMasculino.isSelected()){
                Sexo = "Masculino";
}
            if(rdFeminino.isSelected()){
                Sexo = "Feminino";
}


            BDAluno bda = new BDAluno();

            if( bda.Gravar(Nome, Endereco, Cidade, Estado, Sexo) ) {
            JOptionPane.showMessageDialog(null, "Cadastro Realizado com Sucesso");

        int opcao = Integer.parseInt(JOptionPane.showInputDialog("Deseja realizar outro cadastro?:\n1 - Sim\n2 - Não e sair do programa"));

        switch (opcao) {
            case 1:
            initComponents();
            break;
            case 2:
            System.exit(0);
            break;
            default:
            JOptionPane.showMessageDialog(null, "Opção inválida.");
            break;