How do you add to a JList in Java?

7 Answers. 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.

How do you add items to a JList?

However, JList has no method to add or delete items once it is initialized. Instead, if you need to do this, you must use the ListModel class with a JList. Think of the ListModel as the object which holds the items and the JList as the displayer.

How do you use JList?

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 .

Java Swing | JList with examples.

method explanation
getToolTipText(MouseEvent e) returns the tooltip text to be used for the given event.

How do you refresh a JList in Java?

addElement( “two” ); JList list = new JList( model ); Now whenever you need to change the data you update the model directly using the addElement(), removeElement() or set() methods. The list will automatically be repainted.

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.

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How do I add a listener to JList?

You may also want to do it with the Enter key pressed by adding a KeyListener: jlist. addKeyListener(new KeyAdapter(){ public void keyPressed(KeyEvent e){ if (e. getKeyCode() == KeyEvent.

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.

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.

Which elements are supported by JList?

JList uses a java. awt. Component , provided by a delegate called the cellRendererer , to paint the visible cells in the list. The cell renderer component is used like a “rubber stamp” to paint each visible row.

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.