How to Throw the dice of a Jlist into another Jlist that is in another Jframe?

Question

I tried it in various ways, but I couldn’t find a solution. When I click the save button. I want him to throw the dice on that Jlist to the other Jlist that’s in the Other Jframe. "I couldn’t activate the code block, sorry".

//Método para Adicionar os itens na Jlist

private void btAdicionarGastoActionPerformed(java.awt.event.ActionEvent evt) {                                                 
        listGasto.setModel(item);
        item.addElement(txtNomeGasto.getText() + ": " + txtValorGasto.getText() + " " + "Data: " +txtData.getText());
        txtNomeGasto.setText("");
        txtValorGasto.setText("R$ ");


    } 
    private void 
    btSalvarGastoActionPerformed(java.awt.event.ActionEvent evt) {                                              
            int k=0;
            k = listGasto.getFirstVisibleIndex();
            listGasto.setModel(item);
            receita.setItems((ArrayList<String>) item.getElementAt(k));
            this.hide();
        }                                             

           //Codigo no outro Jframe
            private void formInternalFrameOpened(javax.swing.event.InternalFrameEvent evt) {                                         
            frm = new frmGastos();
            gastos = new DefaultListModel();

            listDadosGasto.setModel(gastos);
            gastos.addElement(frm.receita.getItems());
            listDadosGasto.repaint();
        }                          

can help me?

here is a Google drive link from a program Example: drive.google.com/open? id=0B3LW2w_eQoq4V3BhV0hiQ1o1dnM

Answer 1

Using two frames, one with a list and a button I will call a reference. First I create the list with the items:

DefaultListModel model = new DefaultListModel();

jListReferencia.setModel(model);
model.addElement("Item 1");
model.addElement("Item 2");
model.addElement("Item 3");

Then I create and instate the second JFrame for a private variable:

private JFrameDestino jFrameDestino;

...

jFrameDestino = new JFrameDestino();
jFrameDestino.setVisible(true);

Right after I create the public method in JFrameDestino:

public void copiarItensSelecionados(JList jListReferencia) {
  DefaultListModel list = (DefaultListModel) jListDestino.getModel();

  for (Object sel : jListReferencia.getSelectedValuesList()) {
    if (list.indexOf(sel) == -1) {
      list.addElement(sel);
    }
  }
}

And at the click of the button located on JFrameReferencia I make the following call:

private void jButtonCopiarActionPerformed(java.awt.event.ActionEvent evt) {                                         
  jFrameDestino.copiarItensSelecionados(jListReferencia);
}

Answer 2

If the intention is to copy exactly all items of a Jlist from a window to a Jlist of another, just pass the ListModel from first to second, as window parameter. Since your code is not reproducible, see this example of how to pass values between windows:

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListModel;
import javax.swing.SwingUtilities;

public class JListTest extends JFrame {

    public void createAndShowGUI() {

        String[] selections = { "green", "red", "orange", "dark blue" };
        JList<String> list = new JList(selections);

        setLayout(new BorderLayout());
        add(new JScrollPane(list),BorderLayout.NORTH);

        JButton btn = new JButton("Salvar");
        btn.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                //inicio a segunda janela e passo o
                // model como parametro para a segunda
                SecondList frame = new SecondList();
                frame.createAndShowGUI(list.getModel());

            }
        });
        add(btn, BorderLayout.SOUTH);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new JListTest().createAndShowGUI();

            }
        });
    }
}

class SecondList extends JFrame{

    public void createAndShowGUI(ListModel model) {

        //recebo o model e ja instancio a jlist com ele 
        JList<String> list = new JList(model);
        list.setModel(model);

        setLayout(new FlowLayout());
        add(new JScrollPane(list));
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new JListTest().createAndShowGUI();

            }
        });
    }
}

See working: