如何在JTable的单元格中实现自动完成function？

我的JTable有一个单元编辑器，实现为DefaultCellEditor（JComboBox）类的一个实例。 我尝试过几个不同的东西（ 为Swing Comboboxes添加自动完成支持 ），但它仍然不起作用。

1：

// JComboBox combo = new JComboBox(new Object[] { "Ester", "Jordi", "Jordina", "Jorge", "Sergi" }); AutoCompleteDecorator.decorate(combo); DefaultCellEditor cellEditor = new DefaultCellEditor(combo); TableColumn column = myTable.getColumnModel().getColumn(2); column.setCellEditor(cellEditor); // 

2：

 // Object[] elements = new Object[] { "Ester", "Jordi", "Jordina", "Jorge", "Sergi" }; JComboBox c = new JComboBox(elements); c.setEditable(true); AutoCompleteSupport support = AutoCompleteSupport.install(c, GlazedLists.eventListOf(elements)); support.setSelectsTextOnFocusGain(false); support.setHidesPopupOnFocusLost(false); support.setStrict(false); ComboBoxCellEditor combo = new ComboBoxCellEditor(c); TableColumn column = myTable.getColumnModel().getColumn(2); ComboTableCellRenderer renderer = new ComboTableCellRenderer(); column.setCellRenderer(renderer); column.setCellEditor(combo); // 

3：

 // Object[] elements = new Object[] { "Ester", "Jordi", "Jordina", "Jorge", "Sergi" }; JComboBox comboBox = new JComboBox(elements); comboBox.setEditable(true); AutoCompletion ac = new AutoCompletion(comboBox); ac.setStrict(false); DefaultCellEditor cellEditor = new DefaultCellEditor(comboBox); TableColumn column = myTable.getColumnModel().getColumn(2); column.setCellEditor(cellEditor); // 

我面临的问题是，一旦用户开始在combobox中键入内容，它就会退出编辑模式，从而有效地阻止输入任何值。

Answer 1

我最喜欢的AutoComplete JComboBox / JTextField没有问题，还有第二种选择使用AutoComplete JTextField而不是AutoComplete JComboBox ，

添加到Oracle JTable教程的代码中

 import javax.swing.DefaultCellEditor; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.AbstractTableModel; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableColumn; import java.awt.Component; import java.awt.Dimension; import java.awt.GridLayout; import java.util.ArrayList; /** * TableRenderDemo is just like TableDemo, except that it * explicitly initializes column sizes and it uses a combo box * as an editor for the Sport column. */ public class TableRenderDemo extends JPanel { private static final long serialVersionUID = 1L; private boolean DEBUG = false; public TableRenderDemo() { super(new GridLayout(1, 0)); JTable table = new JTable(new MyTableModel()); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); table.setFillsViewportHeight(true); //Create the scroll pane and add the table to it. JScrollPane scrollPane = new JScrollPane(table); //Set up column sizes. initColumnSizes(table); //Fiddle with the Sport column's cell editors/renderers. setUpSportColumn(table, table.getColumnModel().getColumn(2)); //Add the scroll pane to this panel. add(scrollPane); } /* * This method picks good column sizes. * If all column heads are wider than the column's cells' * contents, then you can just use column.sizeWidthToFit(). */ private void initColumnSizes(JTable table) { MyTableModel model = (MyTableModel) table.getModel(); TableColumn column = null; Component comp = null; int headerWidth = 0; int cellWidth = 0; Object[] longValues = model.longValues; TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer(); for (int i = 0; i < 5; i++) { column = table.getColumnModel().getColumn(i); comp = headerRenderer.getTableCellRendererComponent(null, column.getHeaderValue(), false, false, 0, 0); headerWidth = comp.getPreferredSize().width; comp = table.getDefaultRenderer(model.getColumnClass(i)).getTableCellRendererComponent(table, longValues[i], false, false, 0, i); cellWidth = comp.getPreferredSize().width; if (DEBUG) { System.out.println("Initializing width of column " + i + ". " + "headerWidth = " + headerWidth + "; cellWidth = " + cellWidth); } column.setPreferredWidth(Math.max(headerWidth, cellWidth)); } } public void setUpSportColumn(JTable table, TableColumn sportColumn) { //Set up the editor for the sport cells. ArrayList listSomeString = new ArrayList(); listSomeString.add("Snowboarding"); listSomeString.add("Rowing"); listSomeString.add("Knitting"); listSomeString.add("Speed reading"); listSomeString.add("Pool"); listSomeString.add("None of the above"); Java2sAutoComboBox comboBox = new Java2sAutoComboBox(listSomeString); comboBox.setDataList(listSomeString); comboBox.setMaximumRowCount(3); sportColumn.setCellEditor(new DefaultCellEditor(comboBox)); //Set up tool tips for the sport cells. DefaultTableCellRenderer renderer = new DefaultTableCellRenderer(); renderer.setToolTipText("Click for combo box"); sportColumn.setCellRenderer(renderer); } class MyTableModel extends AbstractTableModel { private static final long serialVersionUID = 1L; private String[] columnNames = {"First Name", "Last Name", "Sport", "# of Years", "Vegetarian"}; private Object[][] data = {{"Kathy", "Smith", "Snowboarding", new Integer(5), false}, {"John", "Doe", "Rowing", new Integer(3), true}, {"Sue", "Black", "Knitting", new Integer(2), false}, {"Jane", "White", "Speed reading", new Integer(20), true}, {"Joe", "Brown", "Pool", new Integer(10), false}}; public final Object[] longValues = {"Jane", "Kathy", "None of the above", new Integer(20), Boolean.TRUE}; @Override public int getColumnCount() { return columnNames.length; } @Override public int getRowCount() { return data.length; } @Override public String getColumnName(int col) { return columnNames[col]; } @Override public Object getValueAt(int row, int col) { return data[row][col]; } /* * JTable uses this method to determine the default renderer/ * editor for each cell. If we didn't implement this method, * then the last column would contain text ("true"/"false"), * rather than a check box. */ @Override public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } /* * Don't need to implement this method unless your table's * editable. */ @Override public boolean isCellEditable(int row, int col) { //Note that the data/cell address is constant, //no matter where the cell appears onscreen. if (col < 2) { return false; } else { return true; } } /* * Don't need to implement this method unless your table's * data can change. */ @Override public void setValueAt(Object value, int row, int col) { if (DEBUG) { System.out.println("Setting value at " + row + "," + col + " to " + value + " (an instance of " + value.getClass() + ")"); } data[row][col] = value; fireTableCellUpdated(row, col); if (DEBUG) { System.out.println("New value of data:"); printDebugData(); } } private void printDebugData() { int numRows = getRowCount(); int numCols = getColumnCount(); for (int i = 0; i < numRows; i++) { System.out.print(" row " + i + ":"); for (int j = 0; j < numCols; j++) { System.out.print(" " + data[i][j]); } System.out.println(); } System.out.println("--------------------------"); } } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Create and set up the window. JFrame frame = new JFrame("TableRenderDemo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane. TableRenderDemo newContentPane = new TableRenderDemo(); newContentPane.setOpaque(true); //content panes must be opaque frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } } 

Answer 2

尝试这个

  JTable table = new JTable(data, columns); table.putClientProperty("terminateEditOnFocusLost", true); JScrollPane scrollPane = new JScrollPane(table); final JXComboBox editorComboBox = new JXComboBox(array); editorComboBox.addAncestorListener(new AncestorListener() { public void ancestorAdded(AncestorEvent event) { //make sure combobox handles key events editorComboBox.requestFocusInWindow(); } public void ancestorMoved(AncestorEvent event) {} public void ancestorRemoved(AncestorEvent event) {} }); AutoCompleteDecorator.decorate(editorComboBox); TableColumn column = table.getColumnModel().getColumn(0); column.setCellEditor(new ComboBoxCellEditor(editorComboBox));