How do you create a drop down list in Java Swing?
By Gabriel Cooper
How do you create a drop down list in Java Swing?
Create a Dropdown Menu Using JComboBox in Java swing package and is used to show a dropdown list in an interface. Below, we first create the array of options to display in the dropdown list. JComboBox is a component and needs a frame to reside, so we create a JFrame object.
Which is the superclass for JComboBox?
Other methods you are most likely to invoke on a JComboBox object are those it inherits from its superclasses, such as setPreferredSize . See The JComponent API for tables of commonly used inherited methods.
Which method returns currently selected item in choice or JComboBox?
Method Summary
| Modifier and Type | Method and Description |
|---|---|
| ListCellRenderer | getRenderer() Returns the renderer used to display the selected item in the JComboBox field. |
| int | getSelectedIndex() Returns the first item in the list that matches the given item. |
| Object | getSelectedItem() Returns the current selected item. |
How add items to JComboBox?
Wrap the values in a class and override the toString() method. Add the ComboItem to your comboBox. comboBox. addItem(new ComboItem(“Visible String 1”, “Value 1”)); comboBox.
What is JComboBox in Java?
JComboBox is a part of Java Swing package. JComboBox inherits JComponent class . JComboBox shows a popup menu that shows a list and the user can select a option from that specified list . JComboBox can be editable or read- only depending on the choice of the programmer .
What event does JComboBox generate?
A JButton object draws itself and processes mouse, keyboard, and focus events on its own. You only hear from the JButton when the user triggers it by clicking on it or pressing the space bar while the button has the input focus. When this happens, the JButton object creates an event object belonging to the class java.
Which Swing component is source of ItemEvent?
The event is passed to every ItemListener object which registered to receive such events using the component’s addItemListener method. The object that implements the ItemListener interface gets this ItemEvent when the event occurs.
How remove all items from JComboBox in Java?
this. combo. removeAllItems(); to remove all the items in JComboBox.
What is KeyEvent in Java?
An event which indicates that a keystroke occurred in a component. This low-level event is generated by a component object (such as a text field) when a key is pressed, released, or typed. ( KeyAdapter objects implement the KeyListener interface.) Each such listener object gets this KeyEvent when the event occurs.
What is Textevent in Java?
A semantic event which indicates that an object’s text changed. This high-level event is generated by an object (such as a TextComponent) when its text changes. The event is passed to every TextListener object which registered to receive such events using the component’s addTextListener method.
