Java javax.swing.table Class DefaultTableModel（JDK8）

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Standard Ed. 8

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java.lang.Object
- javax.swing.table.AbstractTableModel
- - javax.swing.table.DefaultTableModel

All Implemented Interfaces:

Serializable, TableModel
```
public class DefaultTableModel
extends AbstractTableModel
implements Serializable
```
This is an implementation of TableModel that uses a Vector of Vectors to store the cell value objects.
Warning: DefaultTableModel returns a column class of Object. When DefaultTableModel is used with a TableRowSorter this will result in extensive use of toString, which for non-String data types is expensive. If you use DefaultTableModel with a TableRowSorter you are strongly encouraged to override getColumnClass to return the appropriate type.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the java.beans package. Please see XMLEncoder.

See Also:

TableModel, getDataVector()

Field Summary

Fields
Modifier and Type	Field and Description
`protected Vector`	`columnIdentifiers` The `Vector` of column identifiers.
`protected Vector`	`dataVector` The `Vector` of `Vectors` of `Object` values.

Fields inherited from class javax.swing.table.AbstractTableModel
listenerList

Constructor Summary

Constructors
Constructor and Description
`DefaultTableModel()` Constructs a default `DefaultTableModel` which is a table of zero columns and zero rows.
`DefaultTableModel(int rowCount, int columnCount)` Constructs a `DefaultTableModel` with `rowCount` and `columnCount` of `null` object values.
`DefaultTableModel(Object[][] data, Object[] columnNames)` Constructs a `DefaultTableModel` and initializes the table by passing `data` and `columnNames` to the `setDataVector` method.
`DefaultTableModel(Object[] columnNames, int rowCount)` Constructs a `DefaultTableModel` with as many columns as there are elements in `columnNames` and `rowCount` of `null` object values.
`DefaultTableModel(Vector columnNames, int rowCount)` Constructs a `DefaultTableModel` with as many columns as there are elements in `columnNames` and `rowCount` of `null` object values.
`DefaultTableModel(Vector data, Vector columnNames)` Constructs a `DefaultTableModel` and initializes the table by passing `data` and `columnNames` to the `setDataVector` method.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addColumn(Object columnName)` Adds a column to the model.
`void`	`addColumn(Object columnName, Object[] columnData)` Adds a column to the model.
`void`	`addColumn(Object columnName, Vector columnData)` Adds a column to the model.
`void`	`addRow(Object[] rowData)` Adds a row to the end of the model.
`void`	`addRow(Vector rowData)` Adds a row to the end of the model.
`protected static Vector`	`convertToVector(Object[] anArray)` Returns a vector that contains the same objects as the array.
`protected static Vector`	`convertToVector(Object[][] anArray)` Returns a vector of vectors that contains the same objects as the array.
`int`	`getColumnCount()` Returns the number of columns in this data table.
`String`	`getColumnName(int column)` Returns the column name.
`Vector`	`getDataVector()` Returns the `Vector` of `Vectors` that contains the table's data values.
`int`	`getRowCount()` Returns the number of rows in this data table.
`Object`	`getValueAt(int row, int column)` Returns an attribute value for the cell at `row` and `column`.
`void`	`insertRow(int row, Object[] rowData)` Inserts a row at `row` in the model.
`void`	`insertRow(int row, Vector rowData)` Inserts a row at `row` in the model.
`boolean`	`isCellEditable(int row, int column)` Returns true regardless of parameter values.
`void`	`moveRow(int start, int end, int to)` Moves one or more rows from the inclusive range `start` to `end` to the `to` position in the model.
`void`	`newDataAvailable(TableModelEvent event)` Equivalent to `fireTableChanged`.
`void`	`newRowsAdded(TableModelEvent e)` Ensures that the new rows have the correct number of columns.
`void`	`removeRow(int row)` Removes the row at `row` from the model.
`void`	`rowsRemoved(TableModelEvent event)` Equivalent to `fireTableChanged`.
`void`	`setColumnCount(int columnCount)` Sets the number of columns in the model.
`void`	`setColumnIdentifiers(Object[] newIdentifiers)` Replaces the column identifiers in the model.
`void`	`setColumnIdentifiers(Vector columnIdentifiers)` Replaces the column identifiers in the model.
`void`	`setDataVector(Object[][] dataVector, Object[] columnIdentifiers)` Replaces the value in the `dataVector` instance variable with the values in the array `dataVector`.
`void`	`setDataVector(Vector dataVector, Vector columnIdentifiers)` Replaces the current `dataVector` instance variable with the new `Vector` of rows, `dataVector`.
`void`	`setNumRows(int rowCount)` Obsolete as of Java 2 platform v1.3.
`void`	`setRowCount(int rowCount)` Sets the number of rows in the model.
`void`	`setValueAt(Object aValue, int row, int column)` Sets the object value for the cell at `column` and `row`.

Methods inherited from class javax.swing.table.AbstractTableModel
addTableModelListener, findColumn, fireTableCellUpdated, fireTableChanged, fireTableDataChanged, fireTableRowsDeleted, fireTableRowsInserted, fireTableRowsUpdated, fireTableStructureChanged, getColumnClass, getListeners, getTableModelListeners, removeTableModelListener

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - dataVector
```
protected Vector dataVector
```
    The Vector of Vectors of Object values.
  - columnIdentifiers
```
protected Vector columnIdentifiers
```
    The Vector of column identifiers.
- Constructor Detail
  - DefaultTableModel
```
public DefaultTableModel()
```
    Constructs a default DefaultTableModel which is a table of zero columns and zero rows.
  - DefaultTableModel
```
public DefaultTableModel(int rowCount,
                         int columnCount)
```
    Constructs a DefaultTableModel with rowCount and columnCount of null object values.
    
    Parameters:
    
    rowCount - the number of rows the table holds
    
    columnCount - the number of columns the table holds
    
    See Also:
    
    setValueAt(java.lang.Object, int, int)
  - DefaultTableModel
```
public DefaultTableModel(Vector columnNames,
                         int rowCount)
```
    Constructs a DefaultTableModel with as many columns as there are elements in columnNames and rowCount of null object values. Each column's name will be taken from the columnNames vector.
    
    Parameters:
    
    columnNames - vector containing the names of the new columns; if this is null then the model has no columns
    
    rowCount - the number of rows the table holds
    
    See Also:
    
    setDataVector(java.util.Vector, java.util.Vector), setValueAt(java.lang.Object, int, int)
  - DefaultTableModel
```
public DefaultTableModel(Object[] columnNames,
                         int rowCount)
```
    Constructs a DefaultTableModel with as many columns as there are elements in columnNames and rowCount of null object values. Each column's name will be taken from the columnNames array.
    
    Parameters:
    
    columnNames - array containing the names of the new columns; if this is null then the model has no columns
    
    rowCount - the number of rows the table holds
    
    See Also:
    
    setDataVector(java.util.Vector, java.util.Vector), setValueAt(java.lang.Object, int, int)
  - DefaultTableModel
```
public DefaultTableModel(Vector data,
                         Vector columnNames)
```
    Constructs a DefaultTableModel and initializes the table by passing data and columnNames to the setDataVector method.
    
    Parameters:
    
    data - the data of the table, a Vector of Vectors of Object values
    
    columnNames - vector containing the names of the new columns
    
    See Also:
    
    getDataVector(), setDataVector(java.util.Vector, java.util.Vector)
  - DefaultTableModel
```
public DefaultTableModel(Object[][] data,
                         Object[] columnNames)
```
    Constructs a DefaultTableModel and initializes the table by passing data and columnNames to the setDataVector method. The first index in the Object[][] array is the row index and the second is the column index.
    
    Parameters:
    
    data - the data of the table
    
    columnNames - the names of the columns
    
    See Also:
    
    getDataVector(), setDataVector(java.util.Vector, java.util.Vector)
- Method Detail
  - getDataVector
```
public Vector getDataVector()
```
    Returns the Vector of Vectors that contains the table's data values. The vectors contained in the outer vector are each a single row of values. In other words, to get to the cell at row 1, column 5:
    ((Vector)getDataVector().elementAt(1)).elementAt(5);
    
    Returns:
    
    the vector of vectors containing the tables data values
    
    See Also:
    
    newDataAvailable(javax.swing.event.TableModelEvent), newRowsAdded(javax.swing.event.TableModelEvent), setDataVector(java.util.Vector, java.util.Vector)
  - setDataVector
```
public void setDataVector(Vector dataVector,
                          Vector columnIdentifiers)
```
    Replaces the current dataVector instance variable with the new Vector of rows, dataVector. Each row is represented in dataVector as a Vector of Object values. columnIdentifiers are the names of the new columns. The first name in columnIdentifiers is mapped to column 0 in dataVector. Each row in dataVector is adjusted to match the number of columns in columnIdentifiers either by truncating the Vector if it is too long, or adding null values if it is too short.
    Note that passing in a null value for dataVector results in unspecified behavior, an possibly an exception.
    
    Parameters:
    
    dataVector - the new data vector
    
    columnIdentifiers - the names of the columns
    
    See Also:
    
    getDataVector()
  - setDataVector
```
public void setDataVector(Object[][] dataVector,
                          Object[] columnIdentifiers)
```
    Replaces the value in the dataVector instance variable with the values in the array dataVector. The first index in the Object[][] array is the row index and the second is the column index. columnIdentifiers are the names of the new columns.
    
    Parameters:
    
    dataVector - the new data vector
    
    columnIdentifiers - the names of the columns
    
    See Also:
    
    setDataVector(Vector, Vector)
  - newDataAvailable
```
public void newDataAvailable(TableModelEvent event)
```
    Equivalent to fireTableChanged.
    
    Parameters:
    
    event - the change event
  - newRowsAdded
```
public void newRowsAdded(TableModelEvent e)
```
    Ensures that the new rows have the correct number of columns. This is accomplished by using the setSize method in Vector which truncates vectors which are too long, and appends nulls if they are too short. This method also sends out a tableChanged notification message to all the listeners.
    
    Parameters:
    
    e - this TableModelEvent describes where the rows were added. If null it assumes all the rows were newly added
    
    See Also:
    
    getDataVector()
  - rowsRemoved
```
public void rowsRemoved(TableModelEvent event)
```
    Equivalent to fireTableChanged.
    
    Parameters:
    
    event - the change event
  - setNumRows
```
public void setNumRows(int rowCount)
```
    Obsolete as of Java 2 platform v1.3. Please use setRowCount instead.
  - setRowCount
```
public void setRowCount(int rowCount)
```
    Sets the number of rows in the model. If the new size is greater than the current size, new rows are added to the end of the model If the new size is less than the current size, all rows at index rowCount and greater are discarded.
    
    Since:
    
    1.3
    
    See Also:
    
    setColumnCount(int)
  - addRow
```
public void addRow(Vector rowData)
```
    Adds a row to the end of the model. The new row will contain null values unless rowData is specified. Notification of the row being added will be generated.
    
    Parameters:
    
    rowData - optional data of the row being added
  - addRow
```
public void addRow(Object[] rowData)
```
    Adds a row to the end of the model. The new row will contain null values unless rowData is specified. Notification of the row being added will be generated.
    
    Parameters:
    
    rowData - optional data of the row being added
  - insertRow
```
public void insertRow(int row,
                      Vector rowData)
```
    Inserts a row at row in the model. The new row will contain null values unless rowData is specified. Notification of the row being added will be generated.
    
    Parameters:
    
    row - the row index of the row to be inserted
    
    rowData - optional data of the row being added
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if the row was invalid
  - insertRow
```
public void insertRow(int row,
                      Object[] rowData)
```
    Inserts a row at row in the model. The new row will contain null values unless rowData is specified. Notification of the row being added will be generated.
    
    Parameters:
    
    row - the row index of the row to be inserted
    
    rowData - optional data of the row being added
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if the row was invalid
  - moveRow
```
public void moveRow(int start,
                    int end,
                    int to)
```
    Moves one or more rows from the inclusive range start to end to the to position in the model. After the move, the row that was at index start will be at index to. This method will send a tableChanged notification message to all the listeners.
```
  Examples of moves:

  1. moveRow(1,3,5);
          a|B|C|D|e|f|g|h|i|j|k   - before
          a|e|f|g|h|B|C|D|i|j|k   - after

  2. moveRow(6,7,1);
          a|b|c|d|e|f|G|H|i|j|k   - before
          a|G|H|b|c|d|e|f|i|j|k   - after
  
```
    Parameters:
    
    start - the starting row index to be moved
    
    end - the ending row index to be moved
    
    to - the destination of the rows to be moved
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if any of the elements would be moved out of the table's range
  - removeRow
```
public void removeRow(int row)
```
    Removes the row at row from the model. Notification of the row being removed will be sent to all the listeners.
    
    Parameters:
    
    row - the row index of the row to be removed
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if the row was invalid
  - setColumnIdentifiers
```
public void setColumnIdentifiers(Vector columnIdentifiers)
```
    Replaces the column identifiers in the model. If the number of newIdentifiers is greater than the current number of columns, new columns are added to the end of each row in the model. If the number of newIdentifiers is less than the current number of columns, all the extra columns at the end of a row are discarded.
    
    Parameters:
    
    columnIdentifiers - vector of column identifiers. If null, set the model to zero columns
    
    See Also:
    
    setNumRows(int)
  - setColumnIdentifiers
```
public void setColumnIdentifiers(Object[] newIdentifiers)
```
    Replaces the column identifiers in the model. If the number of newIdentifiers is greater than the current number of columns, new columns are added to the end of each row in the model. If the number of newIdentifiers is less than the current number of columns, all the extra columns at the end of a row are discarded.
    
    Parameters:
    
    newIdentifiers - array of column identifiers. If null, set the model to zero columns
    
    See Also:
    
    setNumRows(int)
  - setColumnCount
```
public void setColumnCount(int columnCount)
```
    Sets the number of columns in the model. If the new size is greater than the current size, new columns are added to the end of the model with null cell values. If the new size is less than the current size, all columns at index columnCount and greater are discarded.
    
    Parameters:
    
    columnCount - the new number of columns in the model
    
    Since:
    
    1.3
    
    See Also:
    
    setColumnCount(int)
  - addColumn
```
public void addColumn(Object columnName)
```
    Adds a column to the model. The new column will have the identifier columnName, which may be null. This method will send a tableChanged notification message to all the listeners. This method is a cover for addColumn(Object, Vector) which uses null as the data vector.
    
    Parameters:
    
    columnName - the identifier of the column being added
  - addColumn
```
public void addColumn(Object columnName,
                      Vector columnData)
```
    Adds a column to the model. The new column will have the identifier columnName, which may be null. columnData is the optional vector of data for the column. If it is null the column is filled with null values. Otherwise, the new data will be added to model starting with the first element going to row 0, etc. This method will send a tableChanged notification message to all the listeners.
    
    Parameters:
    
    columnName - the identifier of the column being added
    
    columnData - optional data of the column being added
  - addColumn
```
public void addColumn(Object columnName,
                      Object[] columnData)
```
    Adds a column to the model. The new column will have the identifier columnName. columnData is the optional array of data for the column. If it is null the column is filled with null values. Otherwise, the new data will be added to model starting with the first element going to row 0, etc. This method will send a tableChanged notification message to all the listeners.
    
    See Also:
    
    addColumn(Object, Vector)
  - getRowCount
```
public int getRowCount()
```
    Returns the number of rows in this data table.
    
    Specified by:
    
    getRowCount in interface TableModel
    
    Returns:
    
    the number of rows in the model
    
    See Also:
    
    TableModel.getColumnCount()
  - getColumnCount
```
public int getColumnCount()
```
    Returns the number of columns in this data table.
    
    Specified by:
    
    getColumnCount in interface TableModel
    
    Returns:
    
    the number of columns in the model
    
    See Also:
    
    TableModel.getRowCount()
  - getColumnName
```
public String getColumnName(int column)
```
    Returns the column name.
    
    Specified by:
    
    getColumnName in interface TableModel
    
    Overrides:
    
    getColumnName in class AbstractTableModel
    
    Parameters:
    
    column - the column being queried
    
    Returns:
    
    a name for this column using the string value of the appropriate member in columnIdentifiers. If columnIdentifiers does not have an entry for this index, returns the default name provided by the superclass.
  - isCellEditable
```
public boolean isCellEditable(int row,
                              int column)
```
    Returns true regardless of parameter values.
    
    Specified by:
    
    isCellEditable in interface TableModel
    
    Overrides:
    
    isCellEditable in class AbstractTableModel
    
    Parameters:
    
    row - the row whose value is to be queried
    
    column - the column whose value is to be queried
    
    Returns:
    
    true
    
    See Also:
    
    setValueAt(java.lang.Object, int, int)
  - getValueAt
```
public Object getValueAt(int row,
                         int column)
```
    Returns an attribute value for the cell at row and column.
    
    Specified by:
    
    getValueAt in interface TableModel
    
    Parameters:
    
    row - the row whose value is to be queried
    
    column - the column whose value is to be queried
    
    Returns:
    
    the value Object at the specified cell
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if an invalid row or column was given
  - setValueAt
```
public void setValueAt(Object aValue,
                       int row,
                       int column)
```
    Sets the object value for the cell at column and row. aValue is the new value. This method will generate a tableChanged notification.
    
    Specified by:
    
    setValueAt in interface TableModel
    
    Overrides:
    
    setValueAt in class AbstractTableModel
    
    Parameters:
    
    aValue - the new value; this can be null
    
    row - the row whose value is to be changed
    
    column - the column whose value is to be changed
    
    Throws:
    
    ArrayIndexOutOfBoundsException - if an invalid row or column was given
    
    See Also:
    
    TableModel.getValueAt(int, int), TableModel.isCellEditable(int, int)
  - convertToVector
```
protected static Vector convertToVector(Object[] anArray)
```
    Returns a vector that contains the same objects as the array.
    
    Parameters:
    
    anArray - the array to be converted
    
    Returns:
    
    the new vector; if anArray is null, returns null
  - convertToVector
```
protected static Vector convertToVector(Object[][] anArray)
```
    Returns a vector of vectors that contains the same objects as the array.
    
    Parameters:
    
    anArray - the double array to be converted
    
    Returns:
    
    the new vector of vectors; if anArray is null, returns null

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Standard Ed. 8

All Classes

Summary:
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Field |
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Detail:
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Java javax.swing.table Class DefaultTableModel（JDK8）

Class DefaultTableModel

Field Summary

Fields inherited from class javax.swing.table.AbstractTableModel

Constructor Summary

Method Summary

Methods inherited from class javax.swing.table.AbstractTableModel

Methods inherited from class java.lang.Object

Field Detail

dataVector

columnIdentifiers

Constructor Detail

DefaultTableModel

DefaultTableModel

DefaultTableModel

DefaultTableModel

DefaultTableModel

DefaultTableModel

Method Detail

getDataVector

setDataVector

setDataVector

newDataAvailable

newRowsAdded

rowsRemoved

setNumRows

setRowCount

addRow

addRow

insertRow

insertRow

moveRow

removeRow

setColumnIdentifiers

setColumnIdentifiers

setColumnCount

addColumn

addColumn

addColumn

getRowCount

getColumnCount

getColumnName

isCellEditable

getValueAt

setValueAt

convertToVector

convertToVector