jtable的问题
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当光标在jtable中的某一个单元格中闪着的时候，在这个单元格中新更改的数据并没有被读入（按下enter或者点击另一个单元格后新数据才被读入），用getvalueat（）方法也不能够读出新的值，读出来的只是旧值。怎么解决？
参考技术A 需要给jtable添加选择事件，其它的只需要用按钮事件就可以了。一会给你一个代码你看看，别追问，要不然不够贴代码。
好了，下边是代码，你看一下吧。
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import javax.swing.JFrame;
public class TableDemo extends JFrame
// name文本框
private JTextField nameTextField;
// email文本框
private JTextField emailTextField;
private JTable table;
// Swing中的Table数据是通过DefaultTableModel来实现的，（API上解释是表格模型什么的，具体的记不清了）
private DefaultTableModel model;
private String[] columnNames = "name", "email" ;
private JScrollPane scrollPane;
public TableDemo()
getContentPane().setLayout(null);
model = new DefaultTableModel(columnNames, 0);
// JLabel只是显示文字用的
JLabel lblName = new JLabel("name");
// 设置JLabel的显示位置及大小。
// setBounds(x, y, width, height)
lblName.setBounds(12, 10, 50, 13);
getContentPane().add(lblName);
JLabel lblEmail = new JLabel("email");
lblEmail.setBounds(182, 10, 50, 13);
getContentPane().add(lblEmail);
// 文本框对象实例化，设置大小及显示位置
nameTextField = new JTextField();
nameTextField.setBounds(74, 7, 96, 19);
getContentPane().add(nameTextField);
nameTextField.setColumns(10);
emailTextField = new JTextField();
emailTextField.setBounds(244, 7, 96, 19);
getContentPane().add(emailTextField);
emailTextField.setColumns(10);
// 按钮对象实例化，设置大小及显示位置
JButton btnAdd = new JButton("add");
// 添加按钮事件
btnAdd.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
String[] row = nameTextField.getText(),
emailTextField.getText() ;
// 添加数据
model.addRow(row);
);
btnAdd.setBounds(151, 36, 91, 21);
getContentPane().add(btnAdd);
JButton btnRefresh = new JButton("refresh");
btnRefresh.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent e)
// 取得选中的行。
int rowIndex = table.getSelectedRow();
// 将数据设置到指定的单元格中。
model.setValueAt(nameTextField.getText(), rowIndex, 0);
model.setValueAt(emailTextField.getText(), rowIndex, 1);
);
btnRefresh.setBounds(254, 36, 91, 21);
getContentPane().add(btnRefresh);
scrollPane = new JScrollPane();
scrollPane.addMouseListener(new MouseAdapter()
public void mouseClicked(MouseEvent e)
// 表格的鼠标点击事件。取得表中的选中行。
int rowIndex = table.getSelectedRow();
// 从指定的单元格中取得数据，显示在文本框中。
nameTextField.setText((String) model.getValueAt(rowIndex, 0));
emailTextField.setText((String) model.getValueAt(rowIndex, 1));
);
scrollPane.setBounds(12, 67, 370, 195);
getContentPane().add(scrollPane);
table = new JTable(model);
scrollPane.setViewportView(table);
// 使窗体的X按钮可用。如果不设置 ，按下没有效果。
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocationRelativeTo(null);
// 设置窗体大小
setSize(400, 300);
// 设置窗本大小不可改变。
setResizable(false);
setVisible(true);
public static void main(String[] args)
new TableDemo();
请采纳。追问
写这么多，让你受累了
本回答被提问者采纳JTable - 布尔单元格类型 - 背景
【中文标题】JTable - 布尔单元格类型 - 背景【英文标题】：JTable - Boolean Cell Type - Background 【发布时间】：2011-09-29 22:16:17 【问题描述】：我将 Nimbus L&F 与 JTable 一起使用，该 JTable 有一个布尔（复选框）元素作为其列之一。
我遇到的问题是布尔列不遵循 Nimbus L&F 中存在的自然行背景交替。
【问题讨论】：
【参考方案1】：这是安装合成器的渲染器中的一个错误，快速破解是强制渲染复选框不透明度为true：
((JComponent) table.getDefaultRenderer(Boolean.class)).setOpaque(true);
【讨论】：
非常感谢您提供的解决方案！你为我节省了一个小时的睡眠时间；）【参考方案2】：嗯，我有相反的问题，检查一下，如果没有代码示例，真的没有人可以帮助你，也许有人可以使用 TableCellRenderer 来玩未选择的 AlternateTableColor
Nimbus Defaults
import javax.swing.*;
import javax.swing.table.*;
import java.util.Date;
import java.util.Vector;
import java.awt.*;
import java.awt.event.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import javax.swing.UIManager.LookAndFeelInfo;
public class TableTestPanel extends JPanel
private static final String[] COLUMN_NAMES = "List ID", "Expiration Date", "Status", "Date Created";
private static final DateFormat DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy");
private static final long serialVersionUID = 1L;
private static class StatusPanel extends JPanel
private static final long serialVersionUID = 1L;
private JRadioButton theSingleOption;
private JRadioButton theMarriedOption;
private JRadioButton theDivorcedOption;
StatusPanel()
super(new GridLayout(3, 1));
setOpaque(true);
ButtonGroup buttonGroup = new ButtonGroup();
theSingleOption = new JRadioButton("Single");
theSingleOption.setOpaque(false);
add(theSingleOption);
buttonGroup.add(theSingleOption);
theMarriedOption = new JRadioButton("Married");
theMarriedOption.setOpaque(false);
add(theMarriedOption);
buttonGroup.add(theMarriedOption);
theDivorcedOption = new JRadioButton("Divorced");
theDivorcedOption.setOpaque(false);
add(theDivorcedOption);
buttonGroup.add(theDivorcedOption);
public Status getStatus()
if (theMarriedOption.isSelected())
return Status.MARRIED;
else if (theDivorcedOption.isSelected())
return Status.DIVORCED;
else
return Status.SINGLE;
public void setStatus(Status status)
if (status == Status.MARRIED)
theMarriedOption.setSelected(true);
else if (status == Status.DIVORCED)
theDivorcedOption.setSelected(true);
else
theSingleOption.setSelected(true);
private static class Status
static final Status SINGLE = new Status("Single");
static final Status MARRIED = new Status("Married");
static final Status DIVORCED = new Status("Divorced");
private final String myName; // for debug only
private Status(String name)
myName = name;
@Override
public String toString()
return myName;
private static class TableEntry
private static int instanceNumber;
private Long theId;
private Date theExpirationDate;
private Status theStatus;
private Date theCreationDate;
TableEntry()
instanceNumber++;
theId = new Long(instanceNumber);
theExpirationDate = new Date();
theStatus = Status.SINGLE;
theCreationDate = new Date();
TableEntry(Long anId, Date anExpirationDate, Status aStatus, Date aCreationDate)
theId = anId;
theExpirationDate = anExpirationDate;
theStatus = aStatus;
theCreationDate = aCreationDate;
public Long getId()
return theId;
public Date getExpirationDate()
return theExpirationDate;
public Status getStatus()
return theStatus;
public Date getCreationDate()
return theCreationDate;
public void setId(Long anId)
theId = anId;
public void setExpirationDate(Date anExpirationDate)
theExpirationDate = anExpirationDate;
public void setStatus(Status aStatus)
theStatus = aStatus;
public void setCreationDate(Date aCreationDate)
theCreationDate = aCreationDate;
private static class MyTableModel extends AbstractTableModel
private static final long serialVersionUID = 1L;
private Vector<Object> theEntries;
MyTableModel()
theEntries = new Vector<Object>();
@SuppressWarnings("unchecked")
public void add(TableEntry anEntry)
int index = theEntries.size();
theEntries.add(anEntry);
fireTableRowsInserted(index, index);
public void remove(int aRowIndex)
if (aRowIndex < 0 || aRowIndex >= theEntries.size())
return;
theEntries.removeElementAt(aRowIndex);
fireTableRowsDeleted(aRowIndex, aRowIndex);
public int getRowCount()
return theEntries.size();
@Override
public String getColumnName(int column)
return COLUMN_NAMES[column];
@Override
public Class<?> getColumnClass(int columnIndex)
switch (columnIndex)
case 0:
return Long.class;
case 1:
return Date.class;
case 2:
return Status.class;
case 3:
return Date.class;
return Object.class;
@Override
public void setValueAt(Object aValue, int rowIndex, int columnIndex)
TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
switch (columnIndex)
case 0:
try
entry.setId(new Long(Long.parseLong(aValue.toString())));
catch (NumberFormatException nfe)
return;
break;
case 1:
entry.setExpirationDate((Date) aValue);
break;
case 2:
entry.setStatus((Status) aValue);
break;
case 3:
entry.setCreationDate((Date) aValue);
break;
default:
return;
fireTableCellUpdated(rowIndex, columnIndex);
@Override
public boolean isCellEditable(int rowIndex, int columnIndex)
return true;
@Override
public int getColumnCount()
return 4;
@Override
public Object getValueAt(int rowIndex, int columnIndex)
TableEntry entry = (TableEntry) theEntries.elementAt(rowIndex);
switch (columnIndex)
case 0:
return entry.getId();
case 1:
return entry.getExpirationDate();
case 2:
return entry.getStatus();
case 3:
return entry.getCreationDate();
return null;
private static class DateRenderer extends DefaultTableCellRenderer
private static final long serialVersionUID = 1L;
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (!(value instanceof Date))
return this;
setText(DATE_FORMAT.format((Date) value));
return this;
private static class DateEditor extends AbstractCellEditor implements TableCellEditor
private static final long serialVersionUID = 1L;
private JSpinner theSpinner;
private Object value;
DateEditor()
theSpinner = new JSpinner(new SpinnerDateModel());
theSpinner.setOpaque(true);
theSpinner.setEditor(new JSpinner.DateEditor(theSpinner, "dd/MM/yyyy"));
@Override
public Object getCellEditorValue()
return theSpinner.getValue();
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
theSpinner.setValue(value);
if (isSelected)
theSpinner.setBackground(table.getSelectionBackground());
else
theSpinner.setBackground(table.getBackground());
return theSpinner;
private static class StatusEditor extends AbstractCellEditor implements TableCellEditor
private static final long serialVersionUID = 1L;
private StatusPanel theStatusPanel;
StatusEditor()
theStatusPanel = new StatusPanel();
@Override
public Object getCellEditorValue()
return theStatusPanel.getStatus();
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
theStatusPanel.setStatus((Status) value);
if (isSelected)
theStatusPanel.setBackground(table.getSelectionBackground());
else
theStatusPanel.setBackground(table.getBackground());
return theStatusPanel;
private static class StatusRenderer extends StatusPanel implements TableCellRenderer
private static final long serialVersionUID = 1L;
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
setStatus((Status) value);
if (isSelected)
setBackground(table.getSelectionBackground());
else
setBackground(table.getBackground());
return this;
private MyTableModel theTableModel;
private JTable theTable;
public TableTestPanel()
super(new BorderLayout(0, 5));
setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
theTableModel = new MyTableModel();
theTable = new JTable(theTableModel);
theTable.setDefaultEditor(Date.class, new DateEditor());
theTable.setDefaultRenderer(Date.class, new DateRenderer());
theTable.setDefaultEditor(Status.class, new StatusEditor());
theTable.setDefaultRenderer(Status.class, new StatusRenderer());
// comment out the two preceding lines and uncomment the following one if you want a more standard editor
// theTable.setDefaultEditor(Status.class, new DefaultCellEditor(new JComboBox(new Status[]Status.SINGLE, Status.MARRIED, Status.DIVORCED)));
add(new JScrollPane(theTable), BorderLayout.CENTER);
JToolBar toolBar = new JToolBar();
toolBar.setFloatable(false);
toolBar.add(new AbstractAction("Add new")
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e)
theTableModel.add(new TableEntry());
packTable();
);
toolBar.add(new AbstractAction("Remove")
private static final long serialVersionUID = 1L;
@Override
public void actionPerformed(ActionEvent e)
theTableModel.remove(theTable.getSelectedRow());
);
add(toolBar, BorderLayout.NORTH);
private void packTable()
TableColumnModel columnModel = theTable.getColumnModel();
int columnCount = theTable.getColumnCount();
int rowCount = theTable.getRowCount();
int[][] preferredHeights = new int[columnCount][rowCount];
TableCellRenderer renderer;
Component comp;
for (int col = 0; col < columnCount; col++)
renderer = columnModel.getColumn(col).getCellRenderer();
if (renderer == null)
renderer = theTable.getDefaultRenderer(theTableModel.getColumnClass(col));
for (int row = 0; row < rowCount; row++)
comp = renderer.getTableCellRendererComponent(theTable, theTableModel.getValueAt(row, col), false, false, row, col);
preferredHeights[col][row] = (int) comp.getPreferredSize().getHeight();
for (int row = 0; row < rowCount; row++)
int pref = 0;
for (int col = 0; col < columnCount; col++)
pref = Math.max(pref, preferredHeights[col][row]);
theTable.setRowHeight(row, pref);
public static void main(String[] args)
try
// UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
if (info.getName().equals("Nimbus"))
UIManager.setLookAndFeel(info.getClassName());
break;
catch (Exception e1)
e1.printStackTrace();
final JFrame frame = new JFrame("TestRadioButtonRenderer");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new TableTestPanel());
SwingUtilities.invokeLater(new Runnable()
@Override
public void run()
frame.setSize(400, 300);
frame.setVisible(true);
);
【讨论】：
【参考方案3】：我知道这是旧帖子，但对于其他搜索者：我使用 jxtable() 并解决了这个问题 :)
【讨论】：
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