How do I get the selected index of a JList?
Get selected value from JList
- Create a class that extends JFrame and implements ActionListener interface.
- Create an array of objects.
- Create a new JList with the above array.
- Create a new JButton .
- Call getSelectedIndex to get the index of the selected item in the JList .
How does a JList work?
JList is part of Java Swing package . JList is a component that displays a set of Objects and allows the user to select one or more items . JList inherits JComponent class. JList is a easy way to display an array of Vectors .
What is JList in Java Swing?
The class JList is a component which displays a list of objects and allows the user to select one or more items. A separate model, ListModel, maintains the contents of the list.
What are the fields for javax swing JList class?
javax.swing Class JList
Field Summary | |
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static int | HORIZONTAL_WRAP Indicates “newspaper style” with the cells flowing horizontally then vertically. |
static int | VERTICAL Indicates the default layout: one column of cells. |
What are the different modes that specifies selection mode of JList?
ListSelectionModel. SINGLE_SELECTION: Only one list index can be selected at a time. ListSelectionModel. SINGLE_INTERVAL_SELECTION: Only one contiguous interval can be selected at a time.
Which method of JList returns the topmost selected item?
For example: JScrollPane scrollPane = new JScrollPane(myList); // Or in two steps: JScrollPane scrollPane = new JScrollPane(); scrollPane….Method Summary.
Modifier and Type | Method and Description |
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int | getMaxSelectionIndex() Returns the largest selected cell index, or -1 if the selection is empty. |
What are the selection modes supported by the JList component?
How many types of selection modes for a JList in Java?
- SINGLE_SELECTION: Only one list index can be selected at a time.
- SINGLE_INTERVAL_SELECTION: Only one contiguous interval can be selected at a time.
- MULTIPLE_INTERVAL_SELECTION: In this mode, there is no restriction on what can be selected. This is a default mode.
How do I select multiple items in JList?
Multiple selection list enables the user to select many items from a JList. A SINGLE_INTERVAL_SELECTION list allows selection of a contiguous range of items in the list by clicking the first item, then holding the Shift key while clicking the last item to select in the range.
What is the difference between JList and JComboBox?
A JComboBox is a component that displays a drop-down list and gives users options that we can select one and only one item at a time whereas a JList shows multiple items (rows) to the user and also gives an option to let the user select multiple items.
Which method of JList class returns the number of rows visible?
You can use getFirstVisibleIndex and getLastVisibleIndex methods of JList to calculate number of items it displays when visible. If size of viewport in scroll pane changes then the number of visible rows will also change.
Which of the following components allow multiple selections?
Checkboxes are used to provide optional features which the user may or may not want. They have two states: checked or unchecked. A group of checkboxes can be either exclusive or nonexclusive.
Which Swing classes can be used with progress bars?
To create a progress bar in swing you use the JProgressbar class. With JProgressBar you can either create vertical or horizontal progress bar.