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 the difference between JComboBox and JList?

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.

How do you fill a JList in Java?

  1. create a ListModel which wrapps your java.util.List (e.g. by extending AbstractListModel)
  2. configure JList to use this model.
  3. create and configure a renderer to format/ display the Objects in your list as needed.

How do you add a 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 interface is implemented in JList?

JList ‘s ListUI is responsible for keeping the visual representation up to date with changes, by listening to the model. Simple, dynamic-content, JList applications can use the DefaultListModel class to maintain list elements. This class implements the ListModel interface and also provides a java.

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 is the JToggleButton in Swing GUI?

A JToggleButton is a two-state button. The two states are selected and unselected. The JRadioButton and JCheckBox classes are subclasses of this class. When the user presses the toggle button, it toggles between being pressed or unpressed.

How do I make my 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 I iterate through a JList?

This can be done by calling JList ‘s getModel() method which return a ListModel object. From the ListModel we can get the items size, and we can iterate the entire items of the JList component.

What is a JScrollPane?

A JScrollPane provides a scrollable view of a component. When screen real estate is limited, use a scroll pane to display a component that is large or one whose size can change dynamically. Other containers used to save screen space include split panes and tabbed panes. The code to create a scroll pane can be minimal.

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What is ListModel in Java?

public interface ListModel<E> This interface defines the methods components like JList use to get the value of each cell in a list and the length of the list. Logically the model is a vector, indices vary from 0 to ListDataModel. getSize() – 1.

How do I make a table Swing?

  1. import javax.swing.*;
  2. import javax.swing.event.*;
  3. public class TableExample {
  4. public static void main(String[] a) {
  5. JFrame f = new JFrame(“Table Example”);
  6. String data[][]={ {“101″,”Amit”,”670000″},
  7. {“102″,”Jai”,”780000″},
  8. {“101″,”Sachin”,”700000″}};

What are the different mode 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 elements are supported by JList?

Simple dynamic-content JList applications can use the DefaultListModel class to store list elements. This class implements the ListModel interface and provides the java.

What constructs a JList that displays the elements in the specified array?

JList(ListModel dataModel) Constructs a JList that displays elements from the specified, non-null, model.

Which method in JList allows the user to select multiple ranges of items within the list?

Multiple selection list enables the user to select many items from a JList.

What is the difference between JButton and JToggleButton?

JButton is a nothing more than a push-button which you might already have gone through many times. User can click on it to get anything done. A JToggleButton is another component much similar to a JButton. But the difference is that a JToggleButton goes into pressed state when mouse is pressed on it.

What is toggle button in Java?

A Toggle Button is a two state button. It is either pressed or not pressed. Following example showcase how to modify the default appearance of a Button in a Java Swing application. We are using the following APIs. JToggleButton() − To create a toggle button.

Is the superclass of JToggleButton and JMenuItem?

AbstractButton is an abstract base class for all button components ( JButton , JToggleButton , JCheckBox , JRadioButton , and JMenuItem and its subclasses).

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.

What is the purpose of JTable?

The JTable is used to display and edit regular two-dimensional tables of cells. See How to Use Tables in The Java Tutorial for task-oriented documentation and examples of using JTable .

How do you create a JScrollPane in Java?

  1. import java.awt.FlowLayout;
  2. import javax.swing.JFrame;
  3. import javax.swing.JScrollPane;
  4. import javax.swing.JtextArea;
  5. public class JScrollPaneExample {
  6. private static final long serialVersionUID = 1L;
  7. private static void createAndShowGUI() {
  8. // Create and set up the window.

Which method of a JList returns if no item in the list is selected?

getAccessibleSelectionCount. Returns the number of items currently selected. If no items are selected, the return value will be 0.

How do you remove an element from a JList in Java?

To actually remove the item, we use the syntax . remove(int); where the integer is the index of the item you wish to remove. That is how we add and remove things from a JList, and this concludes our tutorial on the JList.

How do I set the height on JScrollPane?

The solution is to limit the vertical space the JScrollPanel demands using e.g. jScrollPane. setMaxmimumSize(new Dimension(1000, 50)) .

How do I add Scrollpane to JPanel?

getContentPane(). add(scrollPanel); This code will work in general to add JScrollPane to JPanel. Adjust bounds of frame, panel and scrollpane according to your requirements but ensure that the bounds of JScrollPane are within the bounds of the frame otherwise the scrollpane will not be visible.

What is JViewport?

A JViewport class defines the basic scrolling model and it is designed to support both logical scrolling and pixel-based scrolling. The viewport’s child called the view is scrolled by calling JViewport.

What is JTree?

JTree is a Swing component with which we can display hierarchical data. JTree is quite a complex component. A JTree has a ‘root node’ which is the top-most parent for all nodes in the tree. A node is an item in a tree.

What is JTextPane?

A JTextPane is a subclass of JEditorPane. A JTextPane is used for a styled document with embedded images and components. A JTextPane is a text component that can be marked up with the attributes that are represented graphically and it can use a DefaultStyledDocument as the default model.

What is JLabel Java Swing?

JLabel is a class of java Swing . JLabel is used to display a short string or an image icon. JLabel can display text, image or both . JLabel is only a display of text or image and it cannot get focus . JLabel is inactive to input events such a mouse focus or keyboard focus.

What is a list model?

Detailed Description. The ListModel is a simple container of ListElement definitions, each containing data roles. The contents can be defined dynamically, or explicitly in QML. The number of elements in the model can be obtained from its count property.