Create a new ArrayList in Netbeans

Question

I'm new to programming in Netbeans, so keep it as simple as possible, please.

So, right now I have 3 java files in the same project: mainframe.java, edit.java and add.java.

In the mainframe-window you have 2 buttons which get you to the edit and add-window. In the add-window you get to enter a text in a text field and then press a button to add it into an ArrayList, I did this:

public static void main(String args[]) {

    List<String> Hey = new ArrayList<String>();
}

And the Button:

private void btnFortsattActionPerformed(java.awt.event.ActionEvent evt) 

{ 
    //The variable name of the text field is "txfCreate"

    String text = txfCreate.getText();
    Hey.add(text);  //The problem here is that Netbeans cannot find "Hey" symbol 

}

Next, in the edit-window, I have a JList to show the content of the ArrayList. I have no idea know how to code it:(

there's nothing related to netbeans in this question. Like doing the same thing in eclipse would work... — zubergu
– zubergu, Commented Jan 27, 2016 at 11:46
Try to read about Variables Scopes in Java. You will find an aswer in 5 minutes. — Andrey E
– Andrey E, Commented Jan 27, 2016 at 13:11

Rahul Bhawar · Accepted Answer · 2016-01-27 12:44:08Z

1

public class My {

List<String> Hey;

public static void main(String args[]) {
    Hey = new ArrayList<String>();
}

private void btnFortsattActionPerformed(java.awt.event.ActionEvent evt) {
    //The variable name of the text field is "txfCreate"

    String text = txfCreate.getText();
    Hey.add(text);  //The problem here is that Netbeans cannot find "Hey" symbol 
}

}

answered Jan 27, 2016 at 12:44

Rahul Bhawar

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