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create jcombobox form enum depending on language


By : please delete me
Date : October 14 2020, 02:24 PM
hope this fix your issue You have to visit each value of the enum and use its getString method separately in order to retrieve the strings. You can't call a method on a whole array. But creating an array of objects based on calling a method on objects in another array is a very common task.
First, don't forget that you need to retrieve the locale somehow:
code :
Locale locale = Locale.getDefault();
UserEnum[] enumValues = UserEnum.values();
String[] localizedStrings = new String[enumValues.length];
for ( int i = 0; i < enumValues.length; i++ ) {
    localizedStrings[i] = enumValues[i].getString(locale);
}
String[] localizedStrings = Arrays.stream(UserEnum.values())
                                  .map(val->val.getString(locale))
                                  .toArray(String[]::new);


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Why do I get very different behaviours from JComboBox, depending on platform (Windows/Linux) and language (Java/Jython)


By : user3653512
Date : March 29 2020, 07:55 AM
To fix the issue you can do After finally actually getting physical access to the Linux machine I had been testing on remotely, everything worked fine.
So it turns out the problem was something to do with the combination of SSH, XMing, and whatever was set up to do the display forwarding on the Linux machine.

How To Populate JCombobox Depending In Another JCombobox In Java eclipse


By : darshan patel
Date : March 29 2020, 07:55 AM
seems to work fine Greating from Belgium. , Could you please replace the following snippet of code:
code :
BoxCategory.addItemListener(new ItemListener() {

    public void itemStateChanged(ItemEvent arg0) {
        //
        //
        String s = BoxCategory.getSelectedItem().toString();
        String sql = "Select * from Products where Category='" + s + "'";
        //
        try {
            PreparedStatement pst = connection.prepareStatement(sql);

            ResultSet rs = pst.executeQuery();
            while (rs.next()) {
                // BoxDescription.removeAllItems();
                BoxCategory.setSelectedItem(rs.getString("Description"));

            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
});
BoxCategory.addItemListener(new ItemListener() {
        public void itemStateChanged(ItemEvent arg0) {
            String s = BoxCategory.getSelectedItem().toString();
            String sql = "Select * from Products where Category='" + s + "'";
            try {
                PreparedStatement pst = connection.prepareStatement(sql);
                ResultSet rs = pst.executeQuery();
                BoxDescription.removeAllItems();
                while (rs.next()) {
                    BoxDescription.addItem(rs.getString("Description"));
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
});

How to load values into JComboBox,depending on selection from another JComboBox?


By : BBJ
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Actually, if you choose "China" first, then "Pakistan" again, and click on the down arrow of the cety combobox, you'll see the items.
You can easily debug and see when the method is called by adding a println like so,
code :
        ...
        unity.addItemListener(new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent olala) {
// DEBUG
System.out.println("itemStateChanged(): item = " + olala.getItem());
            ...
        unity.setSelectedIndex(1);
        unity.setSelectedIndex(0);
            ...
        public void itemStateChanged(ItemEvent olala){
            cety.removeAllItems();
            cety.addItem("");
            if (unity.getSelectedItem().equals("Pakistan")) {
                cety.addItem("Lahore");
                ...
    JComboBox<String> unity = new JComboBox<>();
    unity.setBounds(430, 280, 140, 25);
    unity.setEditable(true);
    uy.add(unity);

    JLabel city = new JLabel("City:");
    city.setBounds(350, 320, 100, 25);
    city.setForeground(Color.BLACK);
    uy.add(city);

    JComboBox<String> cety = new JComboBox<>();
    cety.setBounds(430, 320, 140, 25);
    uy.add(cety);

    unity.addItemListener(new ItemListener() {
        @Override
        public void itemStateChanged(ItemEvent event) {
            cety.removeAllItems();
            cety.addItem("");
            switch (event.getItem().toString()) {
                case "Pakistan":
                    cety.addItem("Lahore");
                    cety.addItem("Islamabad");
                    cety.addItem("Karachi");
                    cety.addItem("Rawalpindi");
                    cety.addItem("Faisalabad");
                    cety.addItem("Gujjranwala");
                    break;
                case "China":
                    cety.addItem("Beijing");
                    break;
            //  ...
            }
        }
    });
    unity.addItem("Pakistan");
    unity.addItem("China");
    unity.addItem("America");
    unity.addItem("Japan");
    unity.addItem("Bangladesh");
    unity.addItem("Srilanka");
    unity.addItem("India");
    unity.addItem("Turkey");
    unity.addItem("UK");
    unity.addItem("Afghanistan");
    unity.addItem("Iran");
    unity.addItem("Iraq");

// This would be a workaround if you don't want to move the addItems:
//  unity.setSelectedIndex(1);
//  unity.setSelectedIndex(0);

Populate JCombobox values depending on another JCombobox


By : yiun seungryong
Date : March 29 2020, 07:55 AM
With these it helps The PresparedStatement takes care of quoting the parameter, when you use setString()
Try
code :
String query="select User_Name from Client where Client_Name = ?";
PreparedStatement pst=conn.prepareStatement(query); 
pst.setString(1, String.valueOf(client.getSelectedItem()));

Making a second JCombobox visible depending on the selection of the first JComboBox


By : user3002406
Date : March 29 2020, 07:55 AM
To fix the issue you can do Possible duplicate: java swing dynamically adding components
In summary, call revalidate() after adding the new component. This is necessary because, within the listener, you are adding components dynamically, so you need to instruct the layout manager to revalidate and repaint dirty regions.
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