我正在将行插入到抽象表模型中,然后尝试使用fireTableRowsInserted(int,int)更新JTable。它不起作用,我也尝试了其他“射击”方法。我可以更新JTable的唯一方法是对其调用repaint()。 fireTableRowsInserted(int,int)方法缺少什么?
这是示例代码。
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
public class Main {
/**
* A simple class
* @author
*
*/
public class CustObj {
public double x;
public double y;
/**
* Constructor
* @param x
* @param y
*/
public CustObj(double x, double y) {
this.x = x;
this.y = y;
}
public void setX(Double x) {
this.x = x;
}
public void setY(Double y) {
this.y = y;
}
public Double getX() {
return this.x;
}
public Double getY() {
return this.y;
}
}
@SuppressWarnings("serial")
public class MotModel extends AbstractTableModel {
private String[] columnNames = { "Col One", "Col Two" };
private List<CustObj> custOL = new ArrayList<CustObj>(); //List Containing custom objects
@Override
public void addTableModelListener(TableModelListener ml) {
}
/**
* Adds a row to the model
*
* @param i
* @param custObj
*/
public void addRow(int i, CustObj custObj) {
custOL.add(i, custObj);
absModel.fireTableRowsInserted(0, custOL.size()); // does not work
absModel.fireTableDataChanged(); // does not work
// motTable.repaint(); //this works
}
@Override
public Class<?> getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public String getColumnName(int col) {
return columnNames[col];
}
@Override
public int getRowCount() {
return custOL.size();
}
@Override
public Object getValueAt(int row, int col) {
CustObj ro = custOL.get(row);
if (0 == col) {
return ro.getX();
} else if (1 == col) {
return ro.getY();
}
return null;
}
@Override
public boolean isCellEditable(int arg0, int arg1) {
return true;
}
@Override
public void removeTableModelListener(TableModelListener arg0) {
}
@Override
public void setValueAt(Object da, int row, int col) {
CustObj ro = custOL.get(row);
if (col == 0) {
ro.setX(Double.valueOf((String) da));
} else if (col == 1) {
ro.setY(Double.valueOf((String) da));
}
//this.fireTableCellUpdated(row, col); //does not work
}
// Load some dummy objects
public void init() {
custOL.add(new CustObj(1.2, 2.1));
custOL.add(new CustObj(1.4, 4.1));
}
}
private JFrame frame;
private MotModel absModel; //Abstract Table Model
private JTable table; //JTable
private JScrollPane scrollPane;
private JButton btnDebug;
private JButton btnAddRow;
private JButton btnPaint;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Main window = new Main();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application. Create the Abstract Table Model and JTable
*/
public Main() {
initialize();
absModel = new MotModel();
absModel.init();
table = new JTable(absModel);
table.setModel(absModel);
table.setPreferredScrollableViewportSize(new Dimension(100, 70));
table.setFillsViewportHeight(true);
scrollPane.setViewportView(table);
btnPaint = new JButton("Paint");
btnPaint.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
table.repaint();
}
});
btnPaint.setBounds(401, 268, 210, 23);
frame.getContentPane().add(btnPaint);
table.getColumnModel().getColumn(0).setCellEditor(new DefaultCellEditor(new JTextField()));
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setResizable(false);
frame.setBounds(100, 100, 805, 331);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
scrollPane = new JScrollPane();
scrollPane.setBounds(173, 0, 438, 235);
frame.getContentPane().add(scrollPane);
btnDebug = new JButton("Debug");
btnDebug.setBounds(173, 268, 210, 23);
btnDebug.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
debug();
}
});
btnAddRow = new JButton("Add Row");
btnAddRow.setBounds(173, 240, 438, 23);
btnAddRow.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
absModel.addRow(0, new CustObj(1, 6)); // add an object
}
});
frame.getContentPane().add(btnAddRow);
frame.getContentPane().add(btnDebug);
}
/**
* Print the values
*/
protected void debug() {
for (int i = 0; i < absModel.getRowCount(); i++) {
CustObj obj = absModel.custOL.get(i);
System.out.println(obj.x + " " + obj.y);
}
}
}
最佳答案
您没有addTableModelListener
的实现。您可以触发任何您想要的事件,如果没有人可以向您的模型注册侦听器,则该侦听器将永远不会接收到该事件。
因此,从代码中删除以下部分
@Override
public void addTableModelListener(TableModelListener ml) {
}
@Override
public void removeTableModelListener(TableModelListener arg0) {
}