使用ActionListener将int值从一个jFrame传递到另一个jFrame

Question

I Have two classes, I am using ActionListeners, the thing is that i want to receive an int value in the First class from the Second One... THE FIRST CLASS is this one:

public class PanelCotizacion extends javax.swing.JPanel implements ActionListener {
    private int numCotizacion = 0;
    public PanelCotizacion() {
        initComponents();
    }
    public void actionPerformed(ActionEvent e) {
        System.out.println("HERE IS WHERE I WANT TO RECEIVE THE VALUE");
        this numCotizacion = "";
        //THE VALUE THAT I WANT TO RECEIVE FROM THE OTHER jFRAME
        //TRIGGERED BY THE EVENT OF THE BUTTON (action performed)
    }
}

This is the Second One, where i want to send the int value:

public class BusquedaCotizacionGUI extends javax.swing.JFrame {
    private int numCotizacion = 0;
    public BusquedaCotizacionGUI() {
        initComponents();
        this.setLocationRelativeTo(null);
        PanelCotizacion pC = new PanelCotizacion();
        this.cmdOK.addActionListener(pC);
    }
    private void cmdOKActionPerformed(java.awt.event.ActionEvent evt) { 
        this.numCotizacion = Integer.parseInt(this.txtNumCotizacion.getText());
        //Here is where I WANT TO PASS THE VARIABLE "numCotizacion" tho the other class
        //Can Somebody Help Me
        this.dispose();
    }
}

Can you help me guys to do this, Thanks a lot!

Answer 1

From your code i think the BusquedaCotizacionGUI JFrame responsible to open the PanelCotizacion Jpanel and pass your variable.

So there is many ways to pass a variable from JFrame to JPanel .

You can create a constructor taking an int parameter, then pass the variable in the constructor, like:

public PanelCotizacion(int numCotizacion) {
    initComponents();
    this.numCotizacion = numCotizacion;
}

or you could pass the JFrame as a parent component to JPanel to the constructor, then get the value by creating a getting method, like,

private JFrame parent;
public PanelCotizacion(JFrame parent) {
    initComponents();
    this.parent= parent;
}

then get the value like:

parent.getNumCotizacion();

Answer 2

There is Object getSource() method in ActionEvent class, so in your ActionListener you can get the source and cast it to PanelCotizacion . Other possibility is to add reference to your BusquedaCotizacionGUI into PanelCotizacion 's constructor.

Answer 3

in your second JFrame (BusquedaCotizacionGUI) add this line of code (sth ike this) :

 PanelCotizacion.setParam(int parameterToPass)

and in the first JFrame (PanelCotizacion) add a method (say setParam) and an integer field (say myField):

 public void setParam (int param) {
 this.myField = param;
}

You should decide about how to implement this idea (static method vs creating an instance of the first JFrame,...); this is just the general idea, customize it so as to fit your desire.