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使用Swing timer实现Jtable数据定时更新
摘要: 使用Swing timer实现Jtable数据定时更新
程序分三部分，主程序类SuperTable.java，框架类SuperTableFrame.java，数据模板类SuperTableModel.java。
主程序类SuperTable.java，如下：
package supertable.swing;
import javax.swing.*;
public class SuperTable {
public static void main(String[] args){
JFrame frame = new SuperTableFrame();
frame.show();
}
}
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;
/*
* 创建日期 2005-3-21
*/
/**
* @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：
</td> </tr> <tr>