Testando uma coisa aqui,,,

src_main_aux_Utils.java

package main.aux;

/**
 * Created by familia on 01/11/16.
 */
public class Utils {

    public static final String SENHA = "123";

    /*
    Metal
    Nimbus
    CDE/Motif
    GTK+
     */
}

src_main_core_Core.java

package main.core;

import main.aux.Utils;
import main.telas.MainGui;
import main.telas.NovaFinancaGui;
import main.telas.SenhaGui;

import javax.swing.*;
import java.util.ArrayList;

/**
 * Created by familia on 31/10/16.
 *
 * Classe responsável por controlar as principais ações que o programa desempenhará
 */
public class Core {

    /*
     * Instância da tela principal
     */
    private MainGui mainGui;

    /*
     * Instância da tela de senha
     */
    private SenhaGui senhaGui;

    /*
     * Instância da tela de nova finança
     */
    private NovaFinancaGui novaFinancaGui;


    /*
     * ArrayList para armazenar objetos Financa
     */
    private ArrayList<Financa> financas;

    /*
     * Variável final para armazenar a Senha
     */
    private static final String SENHA = Utils.SENHA;


    /*/
     * Construtor sem parâmetro
     */
    public Core(){
        mainGui = new MainGui();
        senhaGui = new SenhaGui(this);
        novaFinancaGui = new NovaFinancaGui(this);

        financas = new ArrayList<>();

        setButtonsListeners();
    }

    /*
     * Método para adicionar listeners a todos os botões necessários
     * da classe da tela principal
     */
    public void setButtonsListeners(){

        /*
        Botao "Nova Finança"
         */
        mainGui.getAddFinanca().addActionListener(e -> novaFinancaGui.setVisible(true));

        /*
        Botao "Remover Selecionada"
         */
        mainGui.getRemoveFinanca().addActionListener(e -> {
            senhaGui.setCall(0);

            senhaGui.getPass().setText("");

            senhaGui.setVisible(true);
        });

        /*
        Botao "Ocultar Selecionada"
         */
        mainGui.getHideFinanca().addActionListener(e -> {
            senhaGui.setCall(1);

            senhaGui.getPass().setText("");

            senhaGui.setVisible(true);
        });
    }

    /*
     * Método público para ser acessado pelas outras telas, servindo
     * para remover o item da lista selecionado
     */
    public void removerFinanca(String senha){

        //Caso a senha esteja correta...
        if (senha.equals(SENHA)){

            //Caso haja algo selecionado na lista...
            if (!mainGui.getLista().isSelectionEmpty()){

                financas.remove(financas.get(mainGui.getLista().getSelectedIndex()));

                atualizarTela();

                JOptionPane.showMessageDialog(mainGui.getParent(), "Removido!");
            }
        } else {

            JOptionPane.showMessageDialog(mainGui.getParent(), "SENHA INCORRETA");
        }
    }

    public void ocultarFinanca(String senha){
        if (senha.equals(SENHA)){
            //TODO ocultar finança selecionada logic here...

            JOptionPane.showMessageDialog(mainGui.getParent(), "Ocultado!");
        } else {

            JOptionPane.showMessageDialog(mainGui.getParent(), "SENHA INCORRETA");
        }
    }

    /*
     * Método público para ser acessado pelas outras telas, servindo
     * para adicionar uma nova finança à lista
     */
    public void addFinanca(Financa financa){
        if (financa != null){

            financas.add(financa);

            atualizarTela();

            JOptionPane.showMessageDialog(mainGui.getParent(), "Adicionado!");

        } else {

            JOptionPane.showMessageDialog(mainGui.getParent(), "Finança nula!! Faz de novo.");
        }
    }

    /*
     * Método privado para atualizar a lista, ressetando o model da mesma
     */
    private void atualizarTela(){
        this.mainGui.getLista().setModel(new AbstractListModel() {
            String[] strings = financasToArray();
            //String[] strings = financas.toArray(new String[financas.size()]);

            public int getSize() {

                return strings.length;
            }

            public Object getElementAt(int i) {

                return strings[i];
            }
        });
    }

    /*
     * Método privado para converter ArrayList<Fincanca> em String[]
     */
    private String[] financasToArray(){
        String[] r = new String[financas.size()];

        for (int i = 0; i < r.length; i++){

            r[i] = financas.get(i).toString();
        }

        return financas.size() > 0 ? r : new String[]{"[vazio]"};
    }

    public MainGui getMainGui() {
        return mainGui;
    }
}

src_main_core_Financa.java

package main.core;

import java.text.SimpleDateFormat;

public class Financa {

    /*
     * Data da finança
     */
    private String data;

    /*
     * Valor da finança
     */
    private double valor;

    /*
     * Nome da finança
     */
    private String nome;

    /*
     * Descrição da finança
     */
    private String descricao;

    /*
     * Construtor que recebe valor, nome e descrição para uma nova finança.
     * Automaticamente define a data como a data atual.
     */
    public Financa(double valor, String nome, String descricao) {
        this.data = new SimpleDateFormat("dd/MM/yyyy").format(System.currentTimeMillis());
        this.valor = valor;
        this.nome = nome;
        this.descricao = descricao;
    }

    /*
     * Construtor que recebe data, valor, nome e descrição para uma nova finança.
     */
    public Financa(String data, double valor, String nome, String descricao) {
        this.data = data;
        this.valor = valor;
        this.nome = nome;
        this.descricao = descricao;
    }

    public double getValor() {
        return valor;
    }

    public void setValor(double valor) {
        this.valor = valor;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }

    public String getDescricao() {
        return descricao;
    }

    public void setDescricao(String descricao) {
        this.descricao = descricao;
    }

    /*
     * O método toString() é aqui invocado para traduzir em texto o objeto
     * finança. Dessa forma o texto contém todos os parâmetros, mostrados
     * em uma String formatada.
     */
    @Override
    public String toString() {
        return "[" + data + "] " + valor + " - " + nome + " - " + descricao;
    }
}

src_main_Main.java

package main;

import main.core.Core;
import main.telas.MainGui;

import java.awt.*;

/**
 * Created by familia on 31/10/16.
 */
public class Main {

    public static void main(String args[]) {

        try {

            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {

                if ("GTK+".equals(info.getName())) {

                    javax.swing.UIManager.setLookAndFeel(info.getClassName());

                    break;
                }
            }
        } catch (ClassNotFoundException | InstantiationException | javax.swing.UnsupportedLookAndFeelException | IllegalAccessException ex) {

            java.util.logging.Logger.getLogger(MainGui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }

        /*
        * Inicia a tela principal
        */
        EventQueue.invokeLater(() -> new Core().getMainGui().setVisible(true));
    }
}

src_main_telas_MainGui.java

package main.telas;

import javax.swing.*;

/**
 *
 * @author familia on 31/10/16.
 */
public class MainGui extends javax.swing.JFrame {

    /**
     * Creates new form MainGui
     */
    public MainGui() {
        initComponents();
        this.setLocationRelativeTo(null);
    }

    /*
     * Inicia todos os componentes e posicionamentos da tela
     */
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        lista = new javax.swing.JList();
        addFinanca = new javax.swing.JButton();
        removeFinanca = new javax.swing.JButton();
        editFinanca = new javax.swing.JButton();
        hideFinanca = new javax.swing.JButton();
        jSeparator1 = new javax.swing.JSeparator();
        dinheiroDisponivel = new javax.swing.JLabel();
        totalGasto = new javax.swing.JLabel();
        totalInvestido = new javax.swing.JLabel();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        sairMenu = new javax.swing.JMenuItem();
        jMenu2 = new javax.swing.JMenu();
        editarMontanteMenu = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Money Helper");

        jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder("Finanças"));

        lista.setModel(new javax.swing.AbstractListModel() {
            String[] strings = {"[vazio]"};

            public int getSize() {
                return strings.length;
            }

            public Object getElementAt(int i) {
                return strings[i];
            }
        });
        jScrollPane1.setViewportView(lista);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
                jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jScrollPane1)
        );
        jPanel1Layout.setVerticalGroup(
                jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 165, Short.MAX_VALUE)
        );

        addFinanca.setText("Adicionar nova");

        removeFinanca.setText("Remover Selecionada");

        editFinanca.setText("Editar Selecionada");

        hideFinanca.setText("Ocultar Selecionada");

        dinheiroDisponivel.setFont(new java.awt.Font("Ubuntu", 1, 18)); // NOI18N
        dinheiroDisponivel.setForeground(new java.awt.Color(14, 191, 34));
        dinheiroDisponivel.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        dinheiroDisponivel.setText("<html>Dinheiro Disponível:<br />R$ 0,00");
        dinheiroDisponivel.setBorder(javax.swing.BorderFactory.createEtchedBorder());

        totalGasto.setFont(new java.awt.Font("Ubuntu", 1, 18)); // NOI18N
        totalGasto.setForeground(new java.awt.Color(215, 57, 57));
        totalGasto.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        totalGasto.setText("<html>Total Gasto:<br />R$ 0,00");
        totalGasto.setBorder(javax.swing.BorderFactory.createEtchedBorder());

        totalInvestido.setFont(new java.awt.Font("Ubuntu", 1, 18)); // NOI18N
        totalInvestido.setForeground(new java.awt.Color(66, 90, 221));
        totalInvestido.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        totalInvestido.setText("Total Investido: R$ 0,00");
        totalInvestido.setBorder(javax.swing.BorderFactory.createEtchedBorder());

        jMenu1.setText("File");

        sairMenu.setText("Sair");
        jMenu1.add(sairMenu);

        jMenuBar1.add(jMenu1);

        jMenu2.setText("Edit");

        editarMontanteMenu.setText("Editar montante...");
        jMenu2.add(editarMontanteMenu);

        jMenuBar1.add(jMenu2);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                        .addComponent(jSeparator1)
                        .addGroup(layout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addComponent(totalInvestido, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                        .addGroup(layout.createSequentialGroup()
                                                .addComponent(dinheiroDisponivel, javax.swing.GroupLayout.PREFERRED_SIZE, 283, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                .addComponent(totalGasto))
                                        .addGroup(layout.createSequentialGroup()
                                                .addComponent(addFinanca)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                .addComponent(removeFinanca)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                .addComponent(editFinanca)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                                .addComponent(hideFinanca)
                                                .addGap(0, 0, Short.MAX_VALUE)))
                                .addContainerGap())
        );
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                        .addComponent(addFinanca)
                                        .addComponent(removeFinanca)
                                        .addComponent(editFinanca)
                                        .addComponent(hideFinanca))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jSeparator1, javax.swing.GroupLayout.PREFERRED_SIZE, 10, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                        .addComponent(dinheiroDisponivel, javax.swing.GroupLayout.DEFAULT_SIZE, 70, Short.MAX_VALUE)
                                        .addComponent(totalGasto))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(totalInvestido, javax.swing.GroupLayout.DEFAULT_SIZE, 54, Short.MAX_VALUE)
                                .addContainerGap())
        );

        pack();
    }

    public JButton getAddFinanca() {
        return addFinanca;
    }

    public JButton getRemoveFinanca() {
        return removeFinanca;
    }

    public JButton getEditFinanca() {
        return editFinanca;
    }

    public JButton getHideFinanca() {
        return hideFinanca;
    }

    public JLabel getDinheiroDisponivel() {
        return dinheiroDisponivel;
    }

    public JLabel getTotalGasto() {
        return totalGasto;
    }

    public JLabel getTotalInvestido() {
        return totalInvestido;
    }

    public JMenuItem getSairMenu() {
        return sairMenu;
    }

    public JMenuItem getEditarMontanteMenu() {
        return editarMontanteMenu;
    }

    public JList getLista() {
        return lista;
    }

    // Variables declaration - do not modify
    private javax.swing.JButton addFinanca;
    private javax.swing.JButton removeFinanca;
    private javax.swing.JButton editFinanca;
    private javax.swing.JButton hideFinanca;
    private javax.swing.JLabel dinheiroDisponivel;
    private javax.swing.JLabel totalGasto;
    private javax.swing.JLabel totalInvestido;
    private javax.swing.JList lista;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem sairMenu;
    private javax.swing.JMenuItem editarMontanteMenu;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSeparator jSeparator1;
    // End of variables declaration
}

src_main_telas_NovaFinancaGui.java

package main.telas;

import main.core.Core;
import main.core.Financa;

import javax.swing.*;

/**
 *
 * @author familia
 */
public class NovaFinancaGui extends JFrame {

    /*
     * Instância para armazenar a classe de controle principal
     */
    private Core core;
    /**
     * Creates new form NovaFinancaGui
     */
    public NovaFinancaGui(Core core) {
        this.core = core;

        initComponents();

        this.setLocationRelativeTo(null);

        this.setListeners();
    }

    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        valor = new javax.swing.JTextField();
        nome = new javax.swing.JTextField();
        data = new javax.swing.JTextField();
        jSeparator1 = new javax.swing.JSeparator();
        jScrollPane1 = new javax.swing.JScrollPane();
        descricao = new javax.swing.JTextArea();
        jSeparator2 = new javax.swing.JSeparator();
        add = new javax.swing.JButton();
        fechar = new javax.swing.JButton();

        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        setTitle("Nova Finança");

        jLabel1.setText("Valor:");

        jLabel2.setText("Título:");

        jLabel3.setText("Data:");

        jSeparator1.setOrientation(javax.swing.SwingConstants.VERTICAL);

        descricao.setColumns(20);
        descricao.setRows(5);
        descricao.setBorder(javax.swing.BorderFactory.createTitledBorder("Descrição"));
        jScrollPane1.setViewportView(descricao);

        add.setText("Adicionar");
        add.setHideActionText(true);
        add.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);

        fechar.setText("Fechar");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(jSeparator2)
                        .addGroup(layout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                                .addGap(0, 0, Short.MAX_VALUE)
                                                .addComponent(add, javax.swing.GroupLayout.PREFERRED_SIZE, 126, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(fechar, javax.swing.GroupLayout.PREFERRED_SIZE, 124, javax.swing.GroupLayout.PREFERRED_SIZE))
                                        .addGroup(layout.createSequentialGroup()
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                                        .addGroup(layout.createSequentialGroup()
                                                                .addComponent(jLabel3)
                                                                .addGap(18, 18, 18)
                                                                .addComponent(data))
                                                        .addGroup(layout.createSequentialGroup()
                                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                                        .addComponent(jLabel1)
                                                                        .addComponent(jLabel2))
                                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                                                        .addComponent(valor, javax.swing.GroupLayout.DEFAULT_SIZE, 99, Short.MAX_VALUE)
                                                                        .addComponent(nome))))
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(jSeparator1, javax.swing.GroupLayout.PREFERRED_SIZE, 6, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 285, Short.MAX_VALUE))))
        );
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                        .addComponent(jSeparator1)
                                        .addGroup(layout.createSequentialGroup()
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                                        .addComponent(jLabel1)
                                                        .addComponent(valor, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                                        .addComponent(jLabel2)
                                                        .addComponent(nome, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                                        .addComponent(jLabel3)
                                                        .addComponent(data, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
                                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addComponent(jSeparator2, javax.swing.GroupLayout.PREFERRED_SIZE, 10, javax.swing.GroupLayout.PREFERRED_SIZE)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                        .addComponent(add)
                                        .addComponent(fechar)))
        );

        pack();
    }

    public void setListeners(){
        fechar.addActionListener(e -> this.dispose());

        add.addActionListener(e -> mandarFinanca());
    }

    public void mandarFinanca(){
        double val = Double.parseDouble(valor.getText());

        String nom = nome.getText();

        String desc = descricao.getText();

        this.core.addFinanca(new Financa(val, nom, desc));
    }

    public JButton getFechar() {
        return fechar;
    }

    public JButton getAdd() {
        return add;
    }

    public JTextField getValor() {
        return valor;
    }

    public JTextField getNome() {
        return nome;
    }

    public JTextField getData() {
        return data;
    }

    public JTextArea getDescricao() {
        return descricao;
    }

    // Variables declaration - do not modify
    private javax.swing.JButton add;
    private javax.swing.JButton fechar;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JSeparator jSeparator1;
    private javax.swing.JSeparator jSeparator2;
    private javax.swing.JTextArea descricao;
    private javax.swing.JTextField valor;
    private javax.swing.JTextField nome;
    private javax.swing.JTextField data;
    // End of variables declaration
}

src_main_telas_SenhaGui.java

package main.telas;

import main.aux.Utils;
import main.core.Core;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 *
 * @author familia
 */
public class SenhaGui extends javax.swing.JFrame {

    private Core core;
    private int call;

    public SenhaGui(Core core) {
        this.core = core;

        initComponents();
        setLocationRelativeTo(null);

        setListeners();

        pass.setText("");
    }

    public SenhaGui(Core core, int call) {
        this.core = core;
        this.call = call;

        initComponents();
        setLocationRelativeTo(null);

        setListeners();

        pass.setText("");
    }

    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        pass = new javax.swing.JPasswordField();
        ok = new javax.swing.JButton();
        cancelar = new javax.swing.JButton();

        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        setTitle("Inserir Senha");

        jLabel1.setText("Senha:");

        ok.setText("Ok");

        cancelar.setText("Cancelar");

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                        .addGroup(layout.createSequentialGroup()
                                                .addComponent(ok, javax.swing.GroupLayout.PREFERRED_SIZE, 84, javax.swing.GroupLayout.PREFERRED_SIZE)
                                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                                                .addComponent(cancelar, javax.swing.GroupLayout.DEFAULT_SIZE, 90, Short.MAX_VALUE))
                                        .addGroup(layout.createSequentialGroup()
                                                .addComponent(jLabel1)
                                                .addGap(2, 2, 2)
                                                .addComponent(pass)))
                                .addContainerGap())
        );
        layout.setVerticalGroup(
                layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                                .addContainerGap()
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                        .addComponent(pass, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                        .addComponent(jLabel1))
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 9, Short.MAX_VALUE)
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                        .addComponent(ok)
                                        .addComponent(cancelar))
                                .addContainerGap())
        );

        pack();
    }

    public void setListeners(){
        cancelar.addActionListener(e -> this.dispose());

        ok.addActionListener(e -> {
            mandarSenha(pass.getText(), call);
            if (pass.getText().equals(Utils.SENHA)){
                this.dispose();
            }
        });

        pass.addActionListener(e -> {
            mandarSenha(pass.getText(), call);
            if (pass.getText().equals(Utils.SENHA)){
                this.dispose();
            }
        });
    }

    public void mandarSenha(String senha, int call){
        switch (call){
            case 0:
                this.core.removerFinanca(senha);
                break;
            case 1:
                this.core.ocultarFinanca(senha);
                break;
        }
    }

    public JButton getOk() {
        return ok;
    }

    public JButton getCancelar() {
        return cancelar;
    }

    public JPasswordField getPass() {
        return pass;
    }

    public void setCall(int call) {
        this.call = call;
    }

    // Variables declaration - do not modify
    private javax.swing.JButton ok;
    private javax.swing.JButton cancelar;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPasswordField pass;
    // End of variables declaration
}