Which of the following method of JList class returns the selected value?
Which of the following method of JList class returns the selected value?
Method Summary
| Modifier and Type | Method and Description |
|---|---|
| E | getSelectedValue() Returns the value for the smallest selected cell index; the selected value when only a single item is selected in the list. |
| Object[] | getSelectedValues() Deprecated. As of JDK 1.7, replaced by getSelectedValuesList() |
How do I check if a JList is selected?
To check if there are any selected items, use the following: boolean res = ! list. isSelectionEmpty();
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 JList in Java?
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 . JList(E [ ] l) : creates an new list with the elements of the array.
How do I make a JList scrollable?
JList doesn’t support scrolling directly. To create a scrolling list you make the JList the viewport view of a JScrollPane. For example: JScrollPane scrollPane = new JScrollPane(dataList); // Or in two steps: JScrollPane scrollPane = new JScrollPane(); scrollPane.
How do you add items to JList?
Populate the JList with a DefaultListModel, not a vector, and have the model visible in the class. Then simply call addElement on the list model to add items to it.
Which of the following creates a list with 3 visible items and multiple selection disabled?
new List(3,false) is the correct answer as it will create the list with 3 visible items and having the multiple selection as disabled.
What is purpose of J tree?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree.
What is the purpose of JTree?
Tree-Related Classes and Interfaces
| Class or Interface | Purpose |
|---|---|
| JTree | The component that presents the tree to the user. |
| TreePath | Represents a path to a node. |
How to select a jlist item in Java?
A JList is a subclass of JComponent class that allows the user to choose either a single or multiple selections of items. A JList can generate a ListSelectiionListener interface and it includes one abstract method valueChanged ().
What are the components of a jlist component?
32. JList is a component that displays a list of objects: It allows the user to select one or more items. 33. A JTextArea is a multi-line text area that displays plain text. 34. JTextPane component is an advanced component for working with text. 35. 36. 37. JList: ListModel and ListSelectionModel. The ListModel handles data.
How to get select element from mouse clicking?
The following code shows how to get select element from mouse clicking location in the JList. The code above generates the following result.
What’s the difference between jlist and jtextarea?
32. JList is a component that displays a list of objects: It allows the user to select one or more items. 33. A JTextArea is a multi-line text area that displays plain text.