无法从其他类调用方法

Question

I have two classes. The main one opens the second one in a jframe in which the user will press a button and trigger a method from the main class/jframe editare(String value) that will automatically add some data to some jtextfields in the main jframe.The problem is that it won't trigger the method.I tried calling other methods from the main class,it doesn't call them either.I tried a lot of stuff for like the past 1-2 hours,can't figure it out.

Here is some code : From the second jframe :

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
Test2 test2=new Test2();
test2.citireser(list.getSelectedValue().toString()); //won't work.works if i call it from the same method,the main one
test2.restart(); //won't work either
this.dispose(); }   

From the first jframe,the main one :

public void citireser(String cur) {
    try {
        serializedPath = "C:/Inter/" + cur;
        InputStream file = new FileInputStream(serializedPath);
        InputStream buffer = new BufferedInputStream(file);
        ObjectInput input = new ObjectInputStream(buffer);

        String[] storeAllArraysREAD[] = (String[][]) input.readObject();
        prodr = storeAllArraysREAD[0];
        cantr = storeAllArraysREAD[1];
        pretr = storeAllArraysREAD[2];
        input.close();
        buffer.close();
        file.close();
       System.err.println("prodr[1]= "+prodr[1].toString());
        for (int m = 0; m < prodr.length - 1; m++) {

        allprod.get(m).setText(prodr[m]);
        allcant.get(m).setText(cantr[m]);
        allpret.get(m).setText(pretr[m]);
        produsnou();

    }

    } catch (ClassNotFoundException ex) {
        System.err.println("EROARE");
    } catch (IOException ex) {
       System.err.println("EROARE");
    }

}

EDIT : Ok,after trying different stuff for a couple of hours i've got it.

public class Opt extends javax.swing.JFrame implements Printable {

private final Test2 main; 

public Opt(Test2 aMain) {
     main = aMain;
    try {

    } catch (Exception e) {
        e.printStackTrace();
    }
    initComponents();
    jScrollPane2.getVerticalScrollBar().setPreferredSize(new Dimension(0, 0));
    jScrollPane2.getVerticalScrollBar().setUnitIncrement(16);

    citirel();

    if (list.getModel().getSize() == 0) {
        jButton1.setEnabled(false);
        jButton2.setEnabled(false);
    }

}

Thanks for your help,i don't know who i should pick as the right answer :( Sorry to the other guy

Answer 1

The problem here is that you're working with a new instance of Test2 . In the action performed (first block of code), you're creating a new Test2 (which would be the first frame). You have to keep somewhere (usually a field) the reference to the first Test2 created.

If you're having further issues, consider editing your question and posting the full code (the two frames entirely, at least). My spider senses are telling me that there's some context missing.

Also, we have similar family names. :-)

Answer 2

Please correct me if any of this is wrong, as I'm trying to understand your program from incomplete code:

1. Test2 (a JFrame containing your program entry point main(string[]) ) at some point creates a second class (also a JFrame ) and opens it.
2. When you click a certain button in your second window, you wish to modify some elements of the Test2 window, and close the secondary window.

Assuming the above is correct, there is one obvious problem I can see in the code snippets you've posted.

In jButton3ActionPerformed , you're creating a new Test2 object, and modifying that. If you want to modify the original window, you need to be storing a reference to it. For example, require a Test2 object as a parameter to your second class, and store that parameter as a field in the class.