Which interfaces are used by implementation of models for JTable?
Like JTree, JTable relies on a separate model object to hold and represent the data it displays and has its own package of helper classes, javax. swing. table. This package contains the TableModel interface and its default implementations, AbstractTableModel and DefaultTableModel.
What is JTable model?
The TableModel interface specifies the methods the JTable will use to interrogate a tabular data model. The JTable can be set up to display any data model which implements the TableModel interface with a couple of lines of code: For further documentation, see Creating a Table Model in The Java Tutorial.
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 .
What is a table model?
Definition. Table Model is a data model created directly from an existing database table. This is like an abstract representation of your underlying table which you can easily manipulate, annotate, add custom dimensions and measures.
What are the methods of Abstractbutton class in Java Swing?
Commonly used Methods of AbstractButton class:
Methods | Description |
---|---|
String getText() | It is used to return the text of the button. |
void setEnabled(boolean b) | It is used to enable or disable the button. |
void setIcon(Icon b) | It is used to set the specified Icon on the button. |
Icon getIcon() | It is used to get the Icon of the button. |
What is the use of container getContentPane?
In Java Swing, the layer that is used to hold objects is called the content pane. Objects are added to the content pane layer of the container. The getContentPane() method retrieves the content pane layer so that you can add an object to it. The content pane is an object created by the Java run time environment.
What is role of model in database describe different types of database models?
A database model shows the logical structure of a database, including the relationships and constraints that determine how data can be stored and accessed. Individual database models are designed based on the rules and concepts of whichever broader data model the designers adopt.
What do you need to know about the JTable?
When designing applications that use the JTable it is worth paying close attention to the data structures that will represent the table’s data. The DefaultTableModel is a model implementation that uses a Vector of Vector s of Object s to store the cell values.
What should the interface be for a mutable model?
Mutable models should be self-validating and implement a validation interface. Consider using immutable models when sharing objects, especially across threads. Consider single and multi-level undo support for MVVM style UIs.
How are interfaces used to provide total abstraction?
It is used to provide total abstraction. That means all the methods in an interface are declared with an empty body and are public and all fields are public, static and final by default. A class that implements an interface must implement all the methods declared in the interface. To implement interface use implements keyword.
How is the JTable used in painting in Java?
The JTable uses integers exclusively to refer to both the rows and the columns of the model that it displays. The JTable simply takes a tabular range of cells and uses getValueAt (int, int) to retrieve the values from the model during painting.