使用Swing timer实现Jtable数据定时更新

框架类SuperTableFrame.java，如下：

package supertable.swing;

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.table.TableModel;

import javax.swing.Action;

import javax.swing.AbstractAction;

import javax.swing.Timer;

/**

* @author Administrator

*

*/

public class SuperTableFrame extends JFrame {

private JTable table = null;

private Timer timer = null;

public SuperTableFrame(){

timer = new Timer(300,updateTableAction);

setTitle("SuperTable");

setSize(300,200);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

});

TableModel model = new SuperTableModel(30,5,10);

table = new JTable(model);

JPanel p = new JPanel();

addButton(p,"Update",new ActionListener(){

public void actionPerformed(ActionEvent evt){

table.validate();

table.updateUI();

}

});

addButton(p,"Start",new ActionListener(){

public void actionPerformed(ActionEvent evt){

timer.start();

}

});

addButton(p,"Stop",new ActionListener(){

public void actionPerformed(ActionEvent evt){

timer.stop();

}

});

Container contentPane = getContentPane();

contentPane.add(new JScrollPane(table),"Center");

contentPane.add(p,"South");

}

public void addButton(Container c,String title,ActionListener a){

JButton b = new JButton(title);

c.add(b);

b.addActionListener(a);

}

private Action updateTableAction = new AbstractAction(){

public void actionPerformed(ActionEvent e){

table.validate();

table.updateUI();

}

};

}

数据模板类SuperTableModel.java，如下：

package supertable.swing;

import java.text.NumberFormat;

import javax.swing.table.AbstractTableModel;

public class SuperTableModel extends AbstractTableModel {

private int years;

private int minRate;

private int maxRate;

private static final double INITAL_BALANCE = 100000.0;

public SuperTableModel(int y,int r1,int r2){

years = y;

minRate =r1;

maxRate = r2;

}

public int getRowCount(){

return years;

}

public int getColumnCount(){

return maxRate -minRate +1;

}

public Object getValueAt(int r,int c){

//double rate = (c + minRate)/100.0;

//int nperiods = r;

//double futureBalance = INITAL_BALANCE * Math.pow(1+rate,nperiods);

double rate = Math.random();

return NumberFormat.getCurrencyInstance().format(rate);

}

public String getColumnName(int c){

double rate = (c+minRate)/100.0;

return NumberFormat.getPercentInstance().format(rate);

}

}

运行图：