Chisel
asked on
Sending information between classes
Hi,
I'm a relative newcomer to Java and am having a problem getting some code to do what I want. I have a main window with a vareity of menu options/buttons. One of these buttons opens up a new window as a data entry panel.
My problem is that I have code in this new window such that when I click OK the data entered in the field has an operation performed on it, and the result is displayed back in the main window. I can't figure out how to get this to work though. Here is a sample of my code cut down to illustrate the bits I'm using.
---From the Main Window---
public class MainMenu extends JFrame implements Action Listener
{
...
JTextArea editPanel;
...
private AddEntry addentry;
public MainMenu()
...
editPanel = newJTextArea();
...
At some point the following code is called on pressing a button:
addentry = new AddEntry(this);
addentry.pack;
addentry.setLocationRelati
This creates the new window I'm working with. Inside this new window is a button handler, and here is where my problem lies. I want the method in here to process some information entered by the user in a JTextField and return the output to the main window in the editPanel. Here is a code snippet of the new window (It uses 2 classes to draw it).
public class AddEntry extend JDialog
{
private AddEntryPanel addentrypanel;
public AddEntry(JFrame owner)
{
...
okButton=new JButton("OK");
...
addentrypanel = new AddEntryPanel();
...
}
class ButtonHandler implements ActionListener
{
...
if ("OK".equals(label))
{
String newinfo = addentrypanel.getInfo();
...
<<Do update to main page code using String newinfo>>
}
}
Hope this code is sufficient to display the structure of my program.
Thanks in advance,
Chris
I'm a relative newcomer to Java and am having a problem getting some code to do what I want. I have a main window with a vareity of menu options/buttons. One of these buttons opens up a new window as a data entry panel.
My problem is that I have code in this new window such that when I click OK the data entered in the field has an operation performed on it, and the result is displayed back in the main window. I can't figure out how to get this to work though. Here is a sample of my code cut down to illustrate the bits I'm using.
---From the Main Window---
public class MainMenu extends JFrame implements Action Listener
{
...
JTextArea editPanel;
...
private AddEntry addentry;
public MainMenu()
...
editPanel = newJTextArea();
...
At some point the following code is called on pressing a button:
addentry = new AddEntry(this);
addentry.pack;
addentry.setLocationRelati
This creates the new window I'm working with. Inside this new window is a button handler, and here is where my problem lies. I want the method in here to process some information entered by the user in a JTextField and return the output to the main window in the editPanel. Here is a code snippet of the new window (It uses 2 classes to draw it).
public class AddEntry extend JDialog
{
private AddEntryPanel addentrypanel;
public AddEntry(JFrame owner)
{
...
okButton=new JButton("OK");
...
addentrypanel = new AddEntryPanel();
...
}
class ButtonHandler implements ActionListener
{
...
if ("OK".equals(label))
{
String newinfo = addentrypanel.getInfo();
...
<<Do update to main page code using String newinfo>>
}
}
Hope this code is sufficient to display the structure of my program.
Thanks in advance,
Chris
ASKER CERTIFIED SOLUTION
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>> <<Do update to main page code using String newinfo>>
Since you pass your JFrame to AddEntry
>> public AddEntry(JFrame owner)
you can pass it to your ButtonHandler too:
public class ButtonHandler {
private JFrame mainFrame;
public ButtonHandler(JFrame f) {
mainFrame = f;
}
Then you can replace
<<Do update to main page code using String newinfo>>
by
mainFrame.setInfo(newinfo)
}
Since you pass your JFrame to AddEntry
>> public AddEntry(JFrame owner)
you can pass it to your ButtonHandler too:
public class ButtonHandler {
private JFrame mainFrame;
public ButtonHandler(JFrame f) {
mainFrame = f;
}
Then you can replace
<<Do update to main page code using String newinfo>>
by
mainFrame.setInfo(newinfo)
}
ASKER
Apologies for the last response, worked great thanks =)
>> Apologies for the last response, worked great thanks =)
You can always ask to reopen the question by posting a zero-point question in
https://www.experts-exchange.com/Community_Support/
Subject: Moderator Please Reopen
Body: Please reopen this question:
https://www.experts-exchange.com/questions/21346794/Sending-information-between-classes.html
Once the question is reopened, you can re-accept by splitting the points
You can always ask to reopen the question by posting a zero-point question in
https://www.experts-exchange.com/Community_Support/
Subject: Moderator Please Reopen
Body: Please reopen this question:
https://www.experts-exchange.com/questions/21346794/Sending-information-between-classes.html
Once the question is reopened, you can re-accept by splitting the points
I can even ask to reopen this one for you. Just let me know what you want
ASKER
Sorry, that was meant to say late response, not last response, I used the code suggested by sudhakar_koundinya.
OK
{
private MainMenu owner=null;
private AddEntryPanel addentrypanel;
public AddEntry(MainMenu owner)
{
this.owner=owner;
okButton=new JButton("OK");
addentrypanel = new AddEntryPanel();
}
class ButtonHandler implements ActionListener
{
if ("OK".equals(label))
{
String newinfo = addentrypanel.getInfo();
owner.editPanel.setText(ne
}
}