【发布时间】：2014-08-26 22:34:00
【问题描述】：
每次调用 please() 时，我都无法重新填充我的表。
它不断添加到现有行中，这不是我想要的。
我想从我的model2 重新填充表格基础。每次please() 被调用时，有人能帮我重新创建表格吗？我的错误是 model2.addRow(please) 被称为...
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.Timer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
public class TableTimeChange {
String rowdata[] = new String[8];
Date[] date123 = new Date[8];
Date[] date1234 = new Date[8];
String[] ddd = new String[8];
static Calendar time1 = Calendar.getInstance();
static Calendar time2 = Calendar.getInstance();
Calendar time3[] = new Calendar[8];
Calendar cal8 = Calendar.getInstance();
Date date = new Date();
DefaultTableModel model2 = new DefaultTableModel();
static int count = 0;
static boolean state = true;
private SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss");
private JTable table = new JTable(getTableModel());
public TableTimeChange() {
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JFrame frame = new JFrame();
frame.add(new JScrollPane(table));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
Timer timer = new Timer(1000, new TimerListener());
timer.start();
frame.setVisible(true);
Calendar cal1 = new GregorianCalendar();
cal1.add(Calendar.SECOND, 5);
date = cal1.getTime();
cal8.setTime(date);
}
private TableModel getTableModel() {
String[] cols = {"Time", "Is Seconds Even", "tttt"};
Object[][] data = {{getNewRow()}, {getNewRow()}};
DefaultTableModel model = new DefaultTableModel(data, cols);
return model;
}
private String getFormatDate(Date date) {
return format.format(date);
}
private Object[] getNewRow() {
Calendar cal = Calendar.getInstance();
int seconds = cal.get(Calendar.SECOND);
boolean isSecondsEven = (seconds % 2 == 0);
return new Object[]{getFormatDate(cal.getTime()), isSecondsEven};
}
public void please() {
while (state == true) {
System.out.println(model2.getRowCount());
Calendar cal = new GregorianCalendar();
cal.add(Calendar.HOUR_OF_DAY, - 5);
Calendar cal2 = new GregorianCalendar();
cal2.add(Calendar.HOUR_OF_DAY, 7);
Date date2 = cal.getTime();
Date date3 = cal2.getTime();
Date date1 = new Date();
SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss a");
Date d1[] = new Date[8];
DateFormat sdf = new SimpleDateFormat("MM-dd-yyyy hh:mm:ss a");
DateFormat sdf2 = new SimpleDateFormat("hh:mm:ss a");
String rod = sdf2.format(date2);
String rod1 = sdf2.format(date3);
Calendar time1 = Calendar.getInstance();
Calendar time2 = Calendar.getInstance();
try {
time1.setTime(sdf2.parse(rod));
time2.setTime(sdf2.parse(rod1));
time1.setTimeZone(TimeZone.getTimeZone("MDT"));
time2.setTimeZone(TimeZone.getTimeZone("MDT"));
} catch (ParseException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
Vector<String> please = new Vector<String>();
for (int i = 0; i < 8; i++) {
try {
d1[i] = sdf.parse(rowdata[i]);
ddd[i] = sdf2.format(d1[i]);
time3[i] = Calendar.getInstance();
time3[i].setTime(sdf2.parse(ddd[i]));
time3[i].setTimeZone(TimeZone.getTimeZone("MDT"));
count++;
if (time3[i].after(time1) && time3[i].before(time2)) {
Vector please2 = new Vector();
String exp = time3[i].getTime().toString();
Date ddddd = time3[i].getTime();
String dddd = format.format(ddddd);
please2.add(dddd);
model2.addRow(please2);
}
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
if (count == 8) {
state = false;
}
}
}
public void remove() {
for (int i = 0; i < model2.getRowCount(); i++) {
model2.removeRow(i);
}
}
private class TimerListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
DefaultTableModel model = (DefaultTableModel) table.getModel();
model2 = model;
String array1[] = {"08-10-2014 08:26:00 PM", "12-15-2001 10:18:54 PM"};
String array2[] = {"08-19-2014 01:18:27 AM", "01-19-2019 01:28:36 PM"};
String array3[] = {"08-05-2014 05:18:57 PM", "08-25-1989 09:18:27 PM"};
String array4[] = {"08-15-2014 08:23:35 PM", "10-25-1985 06:48:27 AM"};
String array5[] = {"08-10-2014 06:00:00 PM", "05-16-2011 03:29:10 AM"};
String array6[] = {"08-25-2014 09:14:08 PM", "11-22-2010 07:00:56 PM"};
String array7[] = {"08-26-2014 09:09:17 PM", "02-05-1969 01:18:17 AM"};
String array8[] = {"08-19-2014 10:02:15 PM", "12-09-2010 05:09:10 PM"};
String[] p = {"L", "S", "R", "T", "D", "C", "L", "R"};
String[] names = {"john", "doe", "moses", "roddrick", "pgmm", "pop", "Don", "Sandia"};
boolean[] t3;
int count2 = 0;
rowdata[0] = array1[0];
rowdata[1] = array2[0];
rowdata[2] = array3[0];
rowdata[3] = array4[0];
rowdata[4] = array5[0];
rowdata[5] = array6[0];
rowdata[6] = array7[0];
rowdata[7] = array8[0];
please();
Date pop = new Date();
System.out.println(format.format(pop));
System.out.println(format.format(date));
if (format.format(pop).equals(format.format(date))) {
Calendar cal1 = new GregorianCalendar();
cal1.add(Calendar.SECOND, 5);
date = cal1.getTime();
System.out.println("My Lord");
state = true;
count = 0;
remove();
please();
}
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TableTimeChange();
}
});
}
}
【问题讨论】：
-
while-loop看起来很麻烦... -
while 循环没问题。每次调用 please 函数时，我的表都不会重新创建。它不断地添加和添加
-
@ddd：while 循环绝不是“好”。您正在跨过 Swing 事件线程。在你知道你的 bug 来自哪里之前，不要假设一切都很好，否则你会阻碍你的进步。
-
remove方法也是错误的，因为它不可能删除所有行，而应该使用while (model2.getRowCount() != 0) { model2.remove(0); } -
在您的
while-loop中，count值不会在循环开始之前重置，这意味着如果您不小心，循环可能会以无限状态结束.你应该使用while (count < 8) {...}或类似的东西来防范它......