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I need to remove all items from the combo box. int itemCount = combo.getItemCount(); for(int i = 0; i < itemCount; i++){ combo.removeItemAt(0); } This code will remove all items except the last one. It gives a NullPointerException. How to fix that?
22 kwi 2015 · Since you have a String array and a JComboBox that have the same items in the same order, you can use the JComboBox.getSelectedIndex() to retrieve the index location of the selected item and remove from the JComboBox and you're array.
1 cze 2022 · setMaximumRowCount (int count): sets the maximum number of rows the JComboBox displays. setEnabled (boolean b): enables the combo box so that items can be selected. removeItem (Object anObject) : removes an item from the item list. removeAllItems (): removes all items from the item list.
Commonly used Constructors: Creates a JComboBox with a default data model. Creates a JComboBox that contains the elements in the specified array. Creates a JComboBox that contains the elements in the specified Vector.
Remove one or more items from the combo box's menu. These methods require that the combo box's data model be an instance of MutableComboBoxModel . int getItemCount()
6 sie 2021 · I n this tutorial, we are going to see how to add and remove items in JComboBox in Java. JComboBox is part of the Java Swing package. JComboBox inherits from the JComponent class. JComboBox displays a contextual menu which shows a list and the user can select an option in this specified list. [st_adsense]
23 maj 2023 · This example demonstrate how to add an items into a specific position in the combo box list or at the end of the list using the insertItemAt (Object o, int index) and addItem (Object o) method. In the code we also learn how to remove one or all items from the list using removeItemAt (int index) method and….
