Thread: issue sending value to new pane

It appears at a glance that the this would be your basic call stack up until you grab the value of lblamnt.

Basic call stack:

main(String[] args)
    MainPage dialog = new MainPage();
        Index2 one = new Index2();
            lblgamnt.setText(getter());
                return gg.gval();
                    lblamnt.getText()

gg being a seperate instance of type Index created and initialized in your Index2:one instance. You probably meant to use the instance you create in your MainPage class. That being said: youre changing lblamnt in the Index:zero instance and trying to read the lblamnt in the Index:gg instance.
I only looked for a second but this might be part of the problem.

You also might run into trouble because you only call the gval() function in the constructor at the time of app initialization. Im not sure if any changes that are made post initialization will be reflected in the value generated by gval(). Might have to be called later in the game after its been changed depending on when you want that value to be sent over to Index2:one.

Norm...thye code is in pastebin already...but oh well..

MainPage.java

import javax.swing.*;
import java.awt.*;
 
public class MainPage extends JDialog{
    private JPanel contentPane;
    private JPanel cardPanel;
 
    //GUI Forms
    final static String INDEX = "Index";
    final static String INDEX2 = "Index 2";
 
    //Card Layout Filler
    public void showPanel(String id) {
        final CardLayout cl = (CardLayout) cardPanel.getLayout();
        cl.show(cardPanel, id);
    }
 
    public MainPage(){
        setContentPane(contentPane);
        setModal(true);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
 
        Index zero = new Index();
        zero.setParentForm(this);
        cardPanel.add(zero.getPanel(), INDEX);
 
        Index2 one = new Index2();
        one.setParentForm(this);
        cardPanel.add(one.getPanel(), INDEX2);
 
        //Initial form loading for default
        final CardLayout cl = (CardLayout) cardPanel.getLayout();
        cl.show(cardPanel, INDEX);
    }
    public static void main(String[] args) {
        MainPage dialog = new MainPage();
        dialog.pack();
        dialog.setVisible(true);
        System.exit(0);
    }
}

Index.java

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class Index {
    private JPanel panel;
    private JLabel lblamnt;
    private JButton button1;
    private JButton btn1;
    private JButton btn2;
    private JButton btn3;
    private JButton btn4;
    private JButton btn5;
    private JButton btn0;
    private MainPage parentForm;
 
    public Index() {
        button1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentForm.showPanel(MainPage.INDEX2);
            }
        });
        btn0.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "0");
            }
        });
        btn1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "1");
            }
        });
        btn2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "2");
            }
        });
        btn3.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "3");
            }
        });
        btn4.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "4");
            }
        });
        btn5.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblamnt.setText(lblamnt.getText() + "5");
            }
        });
    }
    public String gval (){
        return lblamnt.getText();
    }
    public void setParentForm(final MainPage parentForm) {
        this.parentForm = parentForm;
    }
    public JPanel getPanel() {
        return panel;
    }
}

Index2.java

import javax.swing.*;
 
public class Index2 {
    private JPanel panel;
    private JLabel lblgamnt;
    private MainPage parentForm;
    Index gg = new Index();
 
    public Index2() {
        lblgamnt.setText(getter());
    }
 
    public String getter(){
        return gg.gval();
    }
 
    public void setParentForm(final MainPage parentForm) {
        this.parentForm = parentForm;
    }
    public JPanel getPanel() {
        return panel;
    }
}

.
again. im trying to get the value of lblamnt(index) and have that value carried over to lblgamnt(index2)

sorry a misunderstanding. i meant lblamnt(index) as in the variable located in index as in the code snippet. not in the literal coding sense.

Could you give an example? i have to see the code to understand how it works for this.

No compiling errors. When i am on Index.java code and i press button1 to go to Index2.java. The variable im trying to pass is lblamnt or tvar(which is just tvar=tvar+0 or whatever number is pushed.)

--- Update ---

Anything? I have been stuck on this for almost a month.

i have no idea what compile errors you would be getting.

I have rared the whole folder.

https://mega.nz/#!pAgy3LwK!VeprxFczc...M4wQcuMra1DE7A

I have uploaded the files and what you have in the mega.nz is the most current code. I just compiled it fine.

i just rared it 30 minutes ago. I havent touched it. And it also executes just fine.

https://youtu.be/V_5O8107xHo

MainPage.java

import javax.swing.*;
import java.awt.*;
 
public class MainPage extends JDialog{
    private JPanel contentPane;
    private JPanel cardPanel;
    Index Index = new Index();
 
    //GUI Forms
    final static String INDEX = "Index";
    final static String INDEX2 = "Index 2";
 
    //Card Layout Filler
    public void showPanel(String id) {
        final CardLayout cl = (CardLayout) cardPanel.getLayout();
        cl.show(cardPanel, id);
    }
 
    public MainPage(){
        setContentPane(contentPane);
        setModal(true);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
 
        Index zero = new Index();
        zero.setParentForm(this);
        cardPanel.add(zero.getPanel(), INDEX);
 
        Index2 one = new Index2();
        one.setParentForm(this);
        cardPanel.add(one.getPanel(), INDEX2);
 
        //Initial form loading for default
        final CardLayout cl = (CardLayout) cardPanel.getLayout();
        cl.show(cardPanel, INDEX);
    }
    public static void main(String[] args) {
        MainPage dialog = new MainPage();
        dialog.pack();
        dialog.setVisible(true);
        System.exit(0);
    }
}

Index.java

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class Index {
    private JPanel panel;
    private JLabel lblamnt;
    private JButton button1;
    private JButton btn1;
    private JButton btn2;
    private JButton btn3;
    private JButton btn4;
    private JButton btn5;
    private JButton btn0;
    private JButton btnD;
    private JLabel lblDisplay;
    private MainPage parentForm;
    public static String tval = "";
 
    public Index() {
        button1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentForm.showPanel(MainPage.INDEX2);
            }
        });
        btn0.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 0;
                lblamnt.setText(tval);
            }
        });
        btn1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 1;
                lblamnt.setText(tval);
            }
        });
        btn2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 2;
                lblamnt.setText(tval);
            }
        });
        btn3.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 3;
                lblamnt.setText(tval);
            }
        });
        btn4.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 4;
                lblamnt.setText(tval);
            }
        });
        btn5.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                tval = tval + 5;
                lblamnt.setText(tval);
 
            }
        });
        btnD.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                lblDisplay.setText(tval);
            }
        });
    }
    public static String tgval (){
        return tval;
    }
    public void setParentForm(final MainPage parentForm) {
        this.parentForm = parentForm;
    }
    public JPanel getPanel() {
        return panel;
    }
}

Index2.java

import javax.swing.*;
 
public class Index2{
    private JPanel panel;
    private JLabel lblgamnt;
    private MainPage parentForm;
    Index gg = new Index();
 
    public Index2() {
        lblgamnt.setText(getter());
        System.out.println(getter());
    }
 
    public static String getter(){
        return Index.tval;
    }
 
    public void setParentForm(final MainPage parentForm) {
        this.parentForm = parentForm;
    }
    public JPanel getPanel() {
        return panel;
    }
}

button1 is solely to bring the user to index2. There was never a value given to the button1 itself. Could you elaborate?

Also i am confused as to what you have or where you are executing...my code works flawlessly. I copy+pasted it straight from a working code.

https://youtu.be/V_5O8107xHo

this is the video that shows me running the program no errors. I am using 1.8 Java on IntelliJ. I press the Green Play button on top.

Im not sure what you mean. button1 was never meant to have any value assigned to it other than the text "Button". Its sole purpose is to bring the user to Index2.java.

button1.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                parentForm.showPanel(MainPage.INDEX2);
            }
        });

my IntelliJ IDE handles the commands to run the program. I have demonstrated to you in this video https://youtu.be/V_5O8107xHo and my java version is 1.8 for compile and run. I tried showing you this but you replied with...

Originally Posted by Norm

Post the code so I can see it. Not as a link that requires download and unpacking.

So i apologize but im not quite sure what you expect as i have already provided the answers.

Please review this video of what i recorded moments ago. This explains what version im on and how i run it.

https://youtu.be/51H5iuuwIKc