The Java Tutorials have been written for JDK 8.Java教程是为JDK 8编写的。Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.本页中描述的示例和实践没有利用后续版本中引入的改进，并且可能使用不再可用的技术。See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.有关Java SE 9及其后续版本中更新的语言特性的摘要，请参阅Java语言更改。
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.有关所有JDK版本的新功能、增强功能以及已删除或不推荐的选项的信息，请参阅JDK发行说明。
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. |