http://bbs.csdn.net/topics/390195204
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java 达人,
最近在开发一个 java 模块，用到了 JTable。现在对 JTable 里的单元格的操作中，在双击进入单元格后，单元格的内容不是全选中状态。 请问有啥办法使得双击进入单元格后，单元格的内容处于全选中状态？如下面的图片所示
十分感谢！ 下面是已经写好的代码：
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 | import java.awt.BorderLayout; import java.awt.Component; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Vector; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.ScrollPaneLayout; import javax.swing.SwingConstants; import javax.swing.event.ListSelectionEvent; import javax.swing.event.ListSelectionListener; import javax.swing.table.DefaultTableCellRenderer; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableColumn; public class GlobalVari_6 extends JFrame { private static final long serialVersionUID = 1L; private static double select = 0 ; private static int rowIndex = 0 ; public JTable table = null ; // 表格方法使用 public GlobalVari_6() { init(); this .setTitle( "Global Variables" ); this .setSize( new Dimension( 650 , 400 )); this .setLocationRelativeTo( null ); this .setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); this .setVisible( true ); // this.setResizable(false); } private void init() { Vector<String> colHeader = new Vector<String>(); Vector<Vector<String>> dataVec = new Vector<Vector<String>>(); colHeader.add( " Variable" ); colHeader.add( "Value " ); colHeader.add( "Time " ); table = new JTable(dataVec, colHeader) { private static final long serialVersionUID = 1L; public boolean isCellEditable( int row, int column) { if (column > 1 ) { return false ; } else { return true ; } } }; // 2设置表头行高 table.getTableHeader().setPreferredSize( new Dimension( 0 , 20 )); // 3设置表内容行高 table.setRowHeight( 20 ); // 4设置单选模式 table.getSelectionModel().setSelectionMode( ListSelectionModel.SINGLE_SELECTION); // 5设置单元格不可拖动 table.getTableHeader().setReorderingAllowed( false ); // 6设置不可改变列宽 table.getTableHeader().setResizingAllowed( false ); // 7设置列宽 table.getColumnModel().getColumn( 0 ).setPreferredWidth( 95 ); table.getColumnModel().getColumn( 1 ).setPreferredWidth( 55 ); table.getColumnModel().getColumn( 2 ).setPreferredWidth( 30 ); // 注意索引越界 DefaultTableCellRenderer right = new DefaultTableCellRenderer(); // right.setHorizontalAlignment(JLabel.RIGHT); right.setHorizontalAlignment(SwingConstants.RIGHT); table.getColumnModel().getColumn( 1 ).setCellRenderer(right); table.getColumnModel().getColumn( 2 ).setCellRenderer(right); // table.getColumn(table.getColumnName(1)).setHeaderRenderer(right); // table.getTableHeader().setDefaultRenderer(new HeaderRenderer(table)); ((DefaultTableCellRenderer) table.getTableHeader().getDefaultRenderer()) .setHorizontalAlignment(JLabel.RIGHT); TableColumn column = table.getColumnModel().getColumn( 0 ); MultiLineHeaderRenderer headerRenderer = new MultiLineHeaderRenderer( SwingConstants.LEFT, SwingConstants.BOTTOM); column.setHeaderRenderer(headerRenderer); /* * column = table.getColumnModel().getColumn(1); headerRenderer = new * MultiLineHeaderRenderer( SwingConstants.LEFT, SwingConstants.BOTTOM); * column.setHeaderRenderer(headerRenderer); */ final JButton buttonAdd = new JButton( "Add" ); final JButton buttonDel = new JButton( "Delete" ); final JButton buttonCls = new JButton( "Close" ); rowIndex = table.getSelectedRow(); System.out.println( "index:" + rowIndex); // 监听事件 table.getSelectionModel().addListSelectionListener( new ListSelectionListener() { public void valueChanged(ListSelectionEvent e) { if (e.getValueIsAdjusting()) { // 连续操作 rowIndex = table.getSelectedRow(); if (rowIndex != - 1 ) { System.out.println( "表格行被选中" + rowIndex); buttonDel.setEnabled( true ); select = 1 ; } } } }); JScrollPane scrollPane = new JScrollPane(); scrollPane.setLayout( new ScrollPaneLayout()); scrollPane.setViewportView(table); scrollPane.setBounds( 5 , 5 , 515 , 350 ); this .getContentPane().add(scrollPane); buttonAdd.setEnabled( true ); buttonDel.setEnabled( false ); buttonCls.setEnabled( true ); JPanel panel = new JPanel(); panel.setBounds( 520 , 5 , 10 , 350 ); this .getContentPane().add(panel); panel.setLayout( null ); panel.add(buttonAdd); buttonAdd.setSize( 100 , 22 ); buttonAdd.setLocation( 530 , 6 ); panel.add(buttonDel); buttonDel.setSize( 100 , 22 ); buttonDel.setLocation( 530 , 40 ); panel.add(buttonCls); buttonCls.setSize( 100 , 22 ); buttonCls.setLocation( 530 , 322 ); buttonAdd.addMouseListener( new MouseListener() { public void mouseClicked(MouseEvent e) { DefaultTableModel model = (DefaultTableModel) table.getModel(); int rownum = table.getRowCount() + 1 ; boolean exist = true ; for ( int i = 0 ; i < model.getRowCount(); i++) { if (model.getValueAt(i, 0 ).equals( "gvar" + rownum)) { exist = false ; break ; } } if (exist == true ) model.addRow( new Object[] { "gvar" + rownum, "" , new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" ) .format( new Date()) }); } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } }); buttonDel.addMouseListener( new MouseListener() { public void mouseClicked(MouseEvent e) { if (select == 1 ) { DefaultTableModel model = (DefaultTableModel) table .getModel(); model.removeRow(rowIndex); select = 0 ; buttonDel.setEnabled( false ); } } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } }); buttonCls.addMouseListener( new MouseListener() { public void mouseClicked(MouseEvent e) { setVisible( false ); } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } }); this .pack(); } public static void main(String[] args) { new GlobalVari_6(); } } |
在你的init较后面的地方加。
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | TableCellEditor tce = table.getDefaultEditor(String. class ); if (tce instanceof DefaultCellEditor) { DefaultCellEditor dce = (DefaultCellEditor) tce; final Component c = dce.getComponent(); c.addFocusListener( new FocusListener() { @Override public void focusGained(FocusEvent arg0) { System.out.println( "focusGained" ); if (c instanceof JTextComponent) { ((JTextComponent) c).selectAll(); } } @Override public void focusLost(FocusEvent arg0) { } }); } |
但是如果你的JTable里某列自己加过JTextField等。 例如： 写过类似这样的
| 1 | column.setCellEditor( new DefaultCellEditor(textField)); |
那么下面那段也许也要加上。
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | int count = table.getColumnModel().getColumnCount(); for ( int i = 0 ; i < count; i++) { TableColumn tableColumn = table.getColumnModel().getColumn(i); if (tableColumn.getCellEditor() == null ) { continue ; } if (tableColumn.getCellEditor() instanceof DefaultCellEditor) { DefaultCellEditor dce = (DefaultCellEditor) tableColumn .getCellEditor(); final Component c = dce.getComponent(); c.addFocusListener( new FocusListener() { @Override public void focusGained(FocusEvent arg0) { if (c instanceof JTextComponent) { ((JTextComponent) c).selectAll(); } } @Override public void focusLost(FocusEvent arg0) { } }); } } |