CODEWITHSUNDEEP
javaswingnulljdialog
Streetakos
Streetakos

Reputation: 25

Method of JDialog returns null

Question: Why is the String name always null?

This is how I create the dialog Add in my class:

public void init (){
    try {
        Add dialog = new Add();
        dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE );
        //dialog.add(comp)
        dialog.setModal(true) ;
        //dialog.setModalityType(dialog.DEFAULT_MODALITY_TYPE);
        dialog.setVisible(true);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

Here I get the value from the user:

 public void actionPerformed(ActionEvent arg0) {
    name =  textField.getText();
    System.out.println(name);
    setVisible(false);
 }

The method to get user's value from another class:

public String Get(){
    return name;
}

Here I try to use the value, but name is always null:

Add l = new Add();
l.init();
String name = l.Get();

Upvotes: 1

Views: 168

Answers (1)

Viet
Viet

Reputation: 3409

Problem you created Add instance two times. Remove Add dialog = new Add(); in init() method, it will work.

public void init (){
    try {
        this.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE );
        //dialog.add(comp)
        this.setModal(true) ;
        //dialog.setModalityType(dialog.DEFAULT_MODALITY_TYPE);
        this.setVisible(true);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

Upvotes: 1

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