The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.
See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
Upon instantiation, each
JTable
object is passed a table model object that manages the data it displays. By default, a JTable
object inherits a DefaultTable
object if no custom TableModel
object is specified, but by default, this model only manages strings. To handle objects, perform calculations, or to retrieve data from databases or other programs, you must design your own custom TableModel
object, which implements the TableModel
interface. See Creating a Table Model for details.
To detect changes to the data managed by a table model object, the JTable
class needs to implement the TableModelListener
interface, call addTableModelListener()
to catch events, and then override tableChanged()
to respond to listener events. See Listening for Data Changes for details.
The TableModelListener Interface
Because TableModelListener
has only one method, it has no corresponding adapter class.
Method | Purpose |
---|---|
tableChanged(TableModelEvent) | Called when the structure of or data in the table has changed. |
Method | Purpose |
---|---|
Object getSource() (in java.util.EventObject ) |
Return the object that fired the event. |
int getFirstRow() | Return the index of the first row that changed. TableModelEvent.HEADER_ROW specifies the table header. |
int getLastRow() | The last row that changed. Again, HEADER_ROW is a possible value. |
int getColumn() | Return the index of the column that changed. The constant TableModelEvent.ALL_COLUMNS specifies that all the columns might have changed. |
int getType() | What happened to the changed cells. The returned value is one of the following: TableModelEvent.INSERT , TableModelEvent.DELETE , or TableModelEvent.UPDATE . |