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javadefaultjoptionpane

Java JOptionPane default text


When I ask a user to enter a quantity for a program I have made using the code below, the default text is 3.

String input = JOptionPane.showInputDialog(null, "Please enter new quantity",
                                           JOptionPane.QUESTION_MESSAGE);

How do I change this?


Solution

  • The method you have used is:

    public static String showInputDialog(Component parentComponent,
                                         Object message,
                                         Object initialSelectionValue)
    

    Here 3rd argument (initialSelectionValue) is default value in text field. You gave JOptionPane.QUESTION_MESSAGE as 3rd argument which is an int constant having value = 3. So you get 3 as a default value entered in text field.

    Try this:

    String input = JOptionPane.showInputDialog(null,
                    "Please enter new quantity", "");
    

    or this

    String input = JOptionPane.showInputDialog(null,
                    "Please enter new quantity", "Please enter new quantity",
                    JOptionPane.QUESTION_MESSAGE);