DefaultTableModel (Java Platform SE 6) (original) (raw)

javax.swing.table

Class DefaultTableModel

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. WhenDefaultTableModel is used with aTableRowSorter this will result in extensive use oftoString, which for non-String data types is expensive. If you use DefaultTableModel with aTableRowSorter you are strongly encouraged to overridegetColumnClass 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 JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.

See Also:

TableModel, getDataVector()

dataVector

protected Vector dataVector

The Vector of Vectors of Object values.

columnIdentifiers

protected Vector columnIdentifiers

The Vector of column identifiers.

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 withrowCount and columnCount ofnull 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)](../../../javax/swing/table/DefaultTableModel.html#setValueAt%28java.lang.Object, int, int%29)

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)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29), [setValueAt(java.lang.Object, int, int)](../../../javax/swing/table/DefaultTableModel.html#setValueAt%28java.lang.Object, int, int%29)

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 isnull then the model has no columns

rowCount - the number of rows the table holds

See Also:

[setDataVector(java.util.Vector, java.util.Vector)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29), [setValueAt(java.lang.Object, int, int)](../../../javax/swing/table/DefaultTableModel.html#setValueAt%28java.lang.Object, int, int%29)

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)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29)

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)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29)

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)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29)

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 aVector 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 indataVector 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 fordataVector 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)](../../../javax/swing/table/DefaultTableModel.html#setDataVector%28java.util.Vector, java.util.Vector%29)

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 inVector 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 containnull 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 containnull 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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - 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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - 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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - 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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - if the row was invalid

setColumnIdentifiers

public void setColumnIdentifiers(Vector columnIdentifiers)

Replaces the column identifiers in the model. If the number ofnewIdentifiers 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. Ifnull, 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 ofnewIdentifiers 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 indexcolumnCount 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 atableChanged 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 atableChanged 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 atableChanged notification message to all the listeners.

See Also:

[addColumn(Object, Vector)](../../../javax/swing/table/DefaultTableModel.html#addColumn%28java.lang.Object, java.util.Vector%29)

getRowCount

public int getRowCount()

Returns the number of rows in this data table.

Specified by:

[getRowCount](../../../javax/swing/table/TableModel.html#getRowCount%28%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

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](../../../javax/swing/table/TableModel.html#getColumnCount%28%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

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](../../../javax/swing/table/TableModel.html#getColumnName%28int%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

Overrides:

[getColumnName](../../../javax/swing/table/AbstractTableModel.html#getColumnName%28int%29) in class [AbstractTableModel](../../../javax/swing/table/AbstractTableModel.html "class in javax.swing.table")

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](../../../javax/swing/table/TableModel.html#isCellEditable%28int, int%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

Overrides:

[isCellEditable](../../../javax/swing/table/AbstractTableModel.html#isCellEditable%28int, int%29) in class [AbstractTableModel](../../../javax/swing/table/AbstractTableModel.html "class in javax.swing.table")

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)](../../../javax/swing/table/DefaultTableModel.html#setValueAt%28java.lang.Object, int, int%29)

getValueAt

public Object getValueAt(int row, int column)

Returns an attribute value for the cell at row and column.

Specified by:

[getValueAt](../../../javax/swing/table/TableModel.html#getValueAt%28int, int%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - 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 androw. aValue is the new value. This method will generate a tableChanged notification.

Specified by:

[setValueAt](../../../javax/swing/table/TableModel.html#setValueAt%28java.lang.Object, int, int%29) in interface [TableModel](../../../javax/swing/table/TableModel.html "interface in javax.swing.table")

Overrides:

[setValueAt](../../../javax/swing/table/AbstractTableModel.html#setValueAt%28java.lang.Object, int, int%29) in class [AbstractTableModel](../../../javax/swing/table/AbstractTableModel.html "class in javax.swing.table")

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](../../../java/lang/ArrayIndexOutOfBoundsException.html "class in java.lang") - if an invalid row or column was given

See Also:

[TableModel.getValueAt(int, int)](../../../javax/swing/table/TableModel.html#getValueAt%28int, int%29), [TableModel.isCellEditable(int, int)](../../../javax/swing/table/TableModel.html#isCellEditable%28int, int%29)

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 isnull, returns null

Submit a bug or feature
For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

Copyright © 1993, 2015, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.

Scripting on this page tracks web page traffic, but does not change the content in any way.