###JTable问题####

TableModel中的setValueAt改完应该自动刷新的
public void setValueAt(Object value, int row, int col) {import java.awt.Dimension;
import java.awt.GridLayout;import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;/**
* TableDemo is just like SimpleTableDemo, except that it
* uses a custom TableModel.
*/
public class TableDemo extends JPanel {
 private boolean DEBUG = true; public TableDemo() {
 super(new GridLayout(1,0)); JTable table = new JTable(new MyTableModel());
 table.setPreferredScrollableViewportSize(new Dimension(500, 70));
 table.setFillsViewportHeight(true);
table.setRowSelectionAllowed(true);
table.setCellSelectionEnabled(true); //Create the scroll pane and add the table to it.
 JScrollPane scrollPane = new JScrollPane(table); //Add the scroll pane to this panel.
 add(scrollPane);
 } class MyTableModel extends AbstractTableModel {
 private String[] columnNames = {"First Name",
 "Last Name",
 "Sport",
 "# of Years",
 "Vegetarian"};
 private Object[][] data = {
 {"Mary", "Campione",
 "Snowboarding", new Integer(5), new Boolean(false)},
 {"Alison", "Huml",
 "Rowing", new Integer(3), new Boolean(true)},
 {"Kathy", "Walrath",
 "Knitting", new Integer(2), new Boolean(false)},
 {"Sharon", "Zakhour",
 "Speed reading", new Integer(20), new Boolean(true)},
 {"Philip", "Milne",
 "Pool", new Integer(10), new Boolean(false)},
 {"Isaac", "Rabinovitch",
 "Nitpicking", new Integer(1000), new Boolean(false)}
 }; public int getColumnCount() {
 return columnNames.length;
 } public int getRowCount() {
 return data.length;
 } public String getColumnName(int col) {
 return columnNames[col];
 } public Object getValueAt(int row, int col) {
 //根据不同值设置单元格背景颜色
 if(col == 3){
 if((Integer)data[row][col] >= 10)
 return "<html>"+data[row][col]+"</html>";
 else return "<html>"+data[row][col]+"</html>";
 }else {
 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.
 */
 public Class getColumnClass(int c) {
 return getValueAt(0, c).getClass();
 } /*
 * Don't need to implement this method unless your table's
 * editable.
 */
 public boolean isCellEditable(int row, int col) {
 //Note that the data/cell address is constant,
 //no matter where the cell appears onscreen.
 return true;
 } /*
 * Don't need to implement this method unless your table's
 * data can change.
 */
 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("TableDemo");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane.
 TableDemo newContentPane = new TableDemo();
 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() {
 public void run() {
 createAndShowGUI();
 }
 });
 }
}

利用TableCellRendererclass MyRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
setText((value == null) ? "" : value.toString());
if (value != null && Double.parseDouble(value.toString()) > 0.2) {
if (isSelected) {
setForeground(Color.black);
setBackground(Color.green);
} else {
setForeground(Color.white);
setBackground(Color.red);
}
} else {
if (isSelected) {
setForeground(table.getSelectionForeground());
setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
}
return this;
}
}然后MyRenderer myRenderer = new MyRenderer();
table.getColumnModel().getColumn(XX).setCellRenderer(myRenderer);

TableModel中的setValueAt改完应该自动刷新的
public void setValueAt(Object value, int row, int col) {
}你自己实现 setValueAt(Object value, int row, int col)方法

public class TestTable extends JPanel { public TestTable() {
 super(new GridLayout(1,0));
 JTable table = new JTable(new MyTableModel());
 table.setPreferredScrollableViewportSize(new Dimension(500, 70));
 table.setFillsViewportHeight(true);
table.setRowSelectionAllowed(true);
table.setCellSelectionEnabled(true);
 JScrollPane scrollPane = new JScrollPane(table);
 add(scrollPane);
 } class MyTableModel extends AbstractTableModel {
 private String[] columnNames = {"First Name",
 "Last Name",
 "Sport",
 "# of Years",
 "Vegetarian"};
 private Object[][] data = {
 {"Mary", "Campione",
 "Snowboarding", new Integer(5), new Boolean(false)},
 {"Alison", "Huml",
 "Rowing", new Integer(3), new Boolean(true)},
 {"Kathy", "Walrath",
 "Knitting", new Integer(2), new Boolean(false)},
 {"Sharon", "Zakhour",
 "Speed reading", new Integer(20), new Boolean(true)},
 {"Philip", "Milne",
 "Pool", new Integer(10), new Boolean(false)},
 {"Isaac", "Rabinovitch",
 "Nitpicking", new Integer(1000), new Boolean(false)}
 }; public int getColumnCount() {
 return columnNames.length;
 }
 public int getRowCount() {
 return data.length;
 }
 public String getColumnName(int col) {
 return columnNames[col];
 }
 public Object getValueAt(int row, int col) {
 //根据不同值设置单元格背景颜色
 return data[row][col];
 }
 public Class getColumnClass(int c) {
 return getValueAt(0, c).getClass();
 }
 public boolean isCellEditable(int row, int col) {
 return true;
 } public void setValueAt(Object value, int row, int col) {
 if(col == 3){
 System.out.println("value is :"+value);
 value = "<html>"+value+"</html>";
 }
 data[row][col] = value;
 fireTableCellUpdated(row, col);
 }
 } private static void createAndShowGUI() {
 //Create and set up the window.
 JFrame frame = new JFrame("TableDemo");
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Create and set up the content pane.
 TestTable newContentPane = new TestTable();
 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) {
 javax.swing.SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 createAndShowGUI();
 }
 });
 }
}

额，我觉得还是利用Renderer，需要的时候设置为你自己实现的那个Renderer，不需要的时候设置为null

7L可以啊的不知道LZ哪里不对

lz的意思也许是想添加数据后从新扫描下看那些数据》20
然后用红字体显示
我觉得得用
class MyTableActionListener implements TableModelListener
{
@Override
public void tableChanged(TableModelEvent arg0)
{}
}
应该是得添加这个监听

调试易

###JTable问题####

解决方案 »