File	Doc	Category	Size	Date	Package
DefaultTableModel.java	API Doc	Java SE 5 API	23889	Fri Aug 26 14:58:14 BST 2005	javax.swing.table

DefaultTableModel

• java.lang.Object
  • javax.swing.table.AbstractTableModel

Fields Summary
protected Vector	dataVector The Vector of Vectors of Object values.
protected Vector	columnIdentifiers The Vector of column identifiers.

Constructors Summary
public DefaultTableModel() Constructs a default DefaultTableModel which is a table of zero columns and zero rows. this(0, 0);
public DefaultTableModel(int rowCount, int columnCount) Constructs a DefaultTableModel with rowCount and columnCount of null object values. param rowCount the number of rows the table holds param columnCount the number of columns the table holds see #setValueAt this(newVector(columnCount), rowCount);
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. param columnNames vector containing the names of the new columns; if this is null then the model has no columns param rowCount the number of rows the table holds see #setDataVector see #setValueAt setDataVector(newVector(rowCount), columnNames);
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. param columnNames array containing the names of the new columns; if this is null then the model has no columns param rowCount the number of rows the table holds see #setDataVector see #setValueAt this(convertToVector(columnNames), rowCount);
public DefaultTableModel(Vector data, Vector columnNames) Constructs a DefaultTableModel and initializes the table by passing data and columnNames to the setDataVector method. param data the data of the table, a Vector of Vectors of Object values param columnNames vector containing the names of the new columns see #getDataVector see #setDataVector setDataVector(data, columnNames);
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. param data the data of the table param columnNames the names of the columns see #getDataVector see #setDataVector setDataVector(data, columnNames);

Methods Summary
public void	addColumn(java.lang.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. param columnName the identifier of the column being added addColumn(columnName, (Vector)null);
public void	addColumn(java.lang.Object columnName, java.util.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. param columnName the identifier of the column being added param columnData optional data of the column being added columnIdentifiers.addElement(columnName); if (columnData != null) { int columnSize = columnData.size(); if (columnSize > getRowCount()) { dataVector.setSize(columnSize); } justifyRows(0, getRowCount()); int newColumn = getColumnCount() - 1; for(int i = 0; i < columnSize; i++) { Vector row = (Vector)dataVector.elementAt(i); row.setElementAt(columnData.elementAt(i), newColumn); } } else { justifyRows(0, getRowCount()); } fireTableStructureChanged();
public void	addColumn(java.lang.Object columnName, java.lang.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 #addColumn(Object, Vector) addColumn(columnName, convertToVector(columnData));
public void	addRow(java.util.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. param rowData optional data of the row being added insertRow(getRowCount(), rowData);
public void	addRow(java.lang.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. param rowData optional data of the row being added addRow(convertToVector(rowData));
protected static java.util.Vector	convertToVector(java.lang.Object[] anArray) Returns a vector that contains the same objects as the array. param anArray the array to be converted return the new vector; if anArray is null, returns null if (anArray == null) { return null; } Vector v = new Vector(anArray.length); for (int i=0; i < anArray.length; i++) { v.addElement(anArray[i]); } return v;
protected static java.util.Vector	convertToVector(java.lang.Object[][] anArray) Returns a vector of vectors that contains the same objects as the array. param anArray the double array to be converted return the new vector of vectors; if anArray is null, returns null if (anArray == null) { return null; } Vector v = new Vector(anArray.length); for (int i=0; i < anArray.length; i++) { v.addElement(convertToVector(anArray[i])); } return v;
private static int	gcd(int i, int j) return (j == 0) ? i : gcd(j, i%j);
public int	getColumnCount() Returns the number of columns in this data table. return the number of columns in the model return columnIdentifiers.size();
public java.lang.String	getColumnName(int column) Returns the column name. return 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 Object id = null; // This test is to cover the case when // getColumnCount has been subclassed by mistake ... if (column < columnIdentifiers.size()) { id = columnIdentifiers.elementAt(column); } return (id == null) ? super.getColumnName(column) : id.toString();
public java.util.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); return the vector of vectors containing the tables data values see #newDataAvailable see #newRowsAdded see #setDataVector return dataVector;
public int	getRowCount() Returns the number of rows in this data table. return the number of rows in the model return dataVector.size();
public java.lang.Object	getValueAt(int row, int column) Returns an attribute value for the cell at row and column. param row the row whose value is to be queried param column the column whose value is to be queried return the value Object at the specified cell exception ArrayIndexOutOfBoundsException if an invalid row or column was given Vector rowVector = (Vector)dataVector.elementAt(row); return rowVector.elementAt(column);
public void	insertRow(int row, java.util.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. param row the row index of the row to be inserted param rowData optional data of the row being added exception ArrayIndexOutOfBoundsException if the row was invalid dataVector.insertElementAt(rowData, row); justifyRows(row, row+1); fireTableRowsInserted(row, row);
public void	insertRow(int row, java.lang.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. param row the row index of the row to be inserted param rowData optional data of the row being added exception ArrayIndexOutOfBoundsException if the row was invalid insertRow(row, convertToVector(rowData));
public boolean	isCellEditable(int row, int column) Returns true regardless of parameter values. param row the row whose value is to be queried param column the column whose value is to be queried return true see #setValueAt return true;
private void	justifyRows(int from, int to) // Sometimes the DefaultTableModel is subclassed // instead of the AbstractTableModel by mistake. // Set the number of rows for the case when getRowCount // is overridden. dataVector.setSize(getRowCount()); for (int i = from; i < to; i++) { if (dataVector.elementAt(i) == null) { dataVector.setElementAt(new Vector(), i); } ((Vector)dataVector.elementAt(i)).setSize(getColumnCount()); }
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 param start the starting row index to be moved param end the ending row index to be moved param to the destination of the rows to be moved exception ArrayIndexOutOfBoundsException if any of the elements would be moved out of the table's range int shift = to - start; int first, last; if (shift < 0) { first = to; last = end; } else { first = start; last = to + end - start; } rotate(dataVector, first, last + 1, shift); fireTableRowsUpdated(first, last);
public void	newDataAvailable(javax.swing.event.TableModelEvent event) Equivalent to fireTableChanged. param event the change event fireTableChanged(event);
public void	newRowsAdded(javax.swing.event.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. param e this TableModelEvent describes where the rows were added. If null it assumes all the rows were newly added see #getDataVector justifyRows(e.getFirstRow(), e.getLastRow() + 1); fireTableChanged(e);
private static java.util.Vector	newVector(int size) Vector v = new Vector(size); v.setSize(size); return v;
private static java.util.Vector	nonNullVector(java.util.Vector v) return (v != null) ? v : new Vector();
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. param row the row index of the row to be removed exception ArrayIndexOutOfBoundsException if the row was invalid dataVector.removeElementAt(row); fireTableRowsDeleted(row, row);
private static void	rotate(java.util.Vector v, int a, int b, int shift) int size = b - a; int r = size - shift; int g = gcd(size, r); for(int i = 0; i < g; i++) { int to = i; Object tmp = v.elementAt(a + to); for(int from = (to + r) % size; from != i; from = (to + r) % size) { v.setElementAt(v.elementAt(a + from), a + to); to = from; } v.setElementAt(tmp, a + to); }
public void	rowsRemoved(javax.swing.event.TableModelEvent event) Equivalent to fireTableChanged. param event the change event fireTableChanged(event);
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. param columnCount the new number of columns in the model see #setColumnCount columnIdentifiers.setSize(columnCount); justifyRows(0, getRowCount()); fireTableStructureChanged();
public void	setColumnIdentifiers(java.util.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. param columnIdentifiers vector of column identifiers. If null, set the model to zero columns see #setNumRows setDataVector(dataVector, columnIdentifiers);
public void	setColumnIdentifiers(java.lang.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. param newIdentifiers array of column identifiers. If null, set the model to zero columns see #setNumRows setColumnIdentifiers(convertToVector(newIdentifiers));
public void	setDataVector(java.util.Vector dataVector, java.util.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. param dataVector the new data vector param columnIdentifiers the names of the columns see #getDataVector this.dataVector = nonNullVector(dataVector); this.columnIdentifiers = nonNullVector(columnIdentifiers); justifyRows(0, getRowCount()); fireTableStructureChanged();
public void	setDataVector(java.lang.Object[][] dataVector, java.lang.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. param dataVector the new data vector param columnIdentifiers the names of the columns see #setDataVector(Vector, Vector) setDataVector(convertToVector(dataVector), convertToVector(columnIdentifiers));
public void	setNumRows(int rowCount) Obsolete as of Java 2 platform v1.3. Please use setRowCount instead. int old = getRowCount(); if (old == rowCount) { return; } dataVector.setSize(rowCount); if (rowCount <= old) { fireTableRowsDeleted(rowCount, old-1); } else { justifyRows(old, rowCount); fireTableRowsInserted(old, rowCount-1); }
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. see #setColumnCount setNumRows(rowCount);
public void	setValueAt(java.lang.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. param aValue the new value; this can be null param row the row whose value is to be changed param column the column whose value is to be changed exception ArrayIndexOutOfBoundsException if an invalid row or column was given Vector rowVector = (Vector)dataVector.elementAt(row); rowVector.setElementAt(aValue, column); fireTableCellUpdated(row, column);