Dynamic textfield creation

[ki_ha1984]

Hello

I woold like to ask how can i create dynamicly textfields, and how to handle the content of them after the creation????

i have a variable which says how many textfields i will have.

int counttextfields =10; // i need 10 textfields

for(int i=0; i<counttextfields; i++){

//what i have to put here??????


}


Thank you in advanced

ki_ha1984

[JosAH]

I assume that you want to keep track of those JTextFields, so a List<JTextField> can do fine; it stores those JTextFields for you so you can do what you want with them:

List<JTextField> fields= new ArrayList<JTextField>(); // or a LinkeList<JTextField> ...

for (int i= 0; i < counttedxtfields; i++) // create the text fields ...
   fields.add(new JTextField( ... ));

kind regards,

Jos

[ki_ha1984]

this wil create me 10 textfields.
When i wont to read the content of the fifth of sixth thextfield how i will callit????
or if i wont to store all the content of the textfields in an array how i will doit??

thanl you Jos

[JosAH]

Read the API documentation for the List interface, e.g.

String content= fields.get(5).getText();

... retrieves the String content of JTextField #5 in the list.

kind regards,

Jos

[ki_ha1984]

Thank you very much Jos

I will try it and reply you.

[ki_ha1984]

i tried this one in a JFrane1 created with GUI but it give nothing.
I want to add them in a JPanell one by clicking in the button JButton1.

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

int countme = 10;
List<JTextField> fields= new ArrayList<JTextField>(); // or a LinkeList<JTextField> ...

for (int i= 0; i < countme; i++){ // create the text fields ...
fields.add(new JTextField());
}
}

[JosAH]

Do you call the jButton1ActionPerformed( ... ) method somewhere because nothing else will call it ...

kind regards,

Jos

[ki_ha1984]

why and how to call it .
I want to create the JTextfields by pressing the Jbutton.
i mean when i press the Jbutton to load the value of the counttedxtfields from another class and to create the jTextFields with the for() loop, by pressing the jjbutton to appear all the Jtextfields in a jform or better in a jpannel. The JForm an the Jpanel are created by the Netbeans GUI.

ki_ha1984

[JosAH]

why and how to call it .

Have you read this tutorial?

kind regards,

Jos

[ki_ha1984]

yes my friend i have read it .
My problem is that i am not in runtime.
and i want to add the dynamic text fields in the jPanel1 by pressing the jButton1..

package javaappdemos;

import java.util.ArrayList;
import java.util.List;
import javax.swing.JTextField;


public class Tetstagain extends javax.swing.JFrame {

    public Tetstagain() {
        initComponents();
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jButton1 = new javax.swing.JButton();
        jPanel2 = new javax.swing.JPanel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton1.setText("jButton1");
        jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton1MouseClicked(evt);
            }
        });
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 188, Short.MAX_VALUE)
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 112, Short.MAX_VALUE)
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(285, Short.MAX_VALUE)
                .addComponent(jButton1)
                .addGap(42, 42, 42))
            .addGroup(layout.createSequentialGroup()
                .addGap(61, 61, 61)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(26, 26, 26)
                .addComponent(jButton1)
                .addGap(59, 59, 59)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(80, Short.MAX_VALUE))
        );

        pack();
    }

                                         

   [SIZE=3] private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {                                      
        
               int countme = 10;               
        List<JTextField> fields= new ArrayList<JTextField>(); // or a LinkeList<JTextField> ...
 
            for (int i= 0; i < countme; i++){ // create the text fields ...
                fields.add(new JTextField());
            }
    }       [/SIZE]                              

    public static void main(String args[]) {
        
   
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(Tetstagain.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(Tetstagain.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(Tetstagain.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(Tetstagain.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the form
         */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new Tetstagain().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JPanel jPanel2;
    // End of variables declaration
}

[ki_ha1984]

any idea?????

[JosAH]

any idea?????

Yes, I have: put a few System.out.println( ... ) calls in your event handling method and see if it is actuall called when you press your button; note that the situation you are in now has nothing to do with your original question.

kind regards,

Jos

[DarrylBurke]

Cross posted
Dynamic textfield creation (Swing / AWT / SWT / JFace forum at JavaRanch)

db

[ki_ha1984]

Why is different my problem still the same i need to create many textfields by pressing a button.

Sorry about the crosspost .

[JosAH]

Why is different my problem still the same i need to create many textfields by pressing a button.

Sure, but now it's about a button you can't get to work. Read my previous reply again.

kind regards,

Jos