我创建了一个JSpinner对象,每天向上和向下移动,并在点击时跳过周末。然后我添加了一项功能,如果您在周六或周日期间打开该程序,它应该回滚到星期五。问题不在于星期五JSpinner会跳回一周。JSpinner跳跃周而不是天
我试图在新程序中隔离该问题,但都没有成功。代码应该是完全相同的,所以我不确定是什么导致了这个问题。
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.annotation.PostConstruct;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.SpinnerDateModel;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
@SuppressWarnings("serial")
public class MainFrame extends JFrame {
DecimalFormat df = new DecimalFormat("#.00");
SpinnerDateModel spinnerModel;
JSpinner spinner;
Integer loopStep;
Integer firstloopStep = 0;
MainFrame() {
super("Spinner Control");
setLayout(new BorderLayout());
JPanel panel1 = new JPanel();
JPanel panelNorth = new JPanel();
// spinner for date information
spinnerModel = new SpinnerDateModel();
spinnerModel.setCalendarField(Calendar.WEEK_OF_MONTH);
spinner = new JSpinner(spinnerModel);
JSpinner.DateEditor editor = new JSpinner.DateEditor(spinner, "EEEEE, dd MMMMM, yyyy");
spinner.setEditor(editor);
// add panels/buttons/etc to page
add(panel1, BorderLayout.PAGE_START);
panel1.setPreferredSize(new Dimension(1280, 100));
panelNorth.setPreferredSize(new Dimension(1280, 40));
panel1.add(panelNorth, BorderLayout.NORTH);
panelNorth.add(spinner, BorderLayout.PAGE_START);
//method executes on start up
skipWeekends();
loopStep = 0;
//rotate the date, skip weekends, works fine here
spinner.addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent arg0) {
Date date = (Date) spinner.getValue();
System.out.println("todays date " + date);
SimpleDateFormat sdf = new SimpleDateFormat("EEEEE, dd MMMMM, yyyy");
String stringDate = sdf.format(date);
System.out.println(stringDate);
char c = stringDate.charAt(0);
char c2 = stringDate.charAt(1);
//skip the weekends
if ((c == 'S') && (c2 == 'a') && (loopStep == 0)) {
loopStep = 1;
spinner.setValue(spinner.getNextValue());
spinner.setValue(spinner.getNextValue());
System.out.println("Saturday Spinner going back 2");
}
if ((c == 'S') && (c2 == 'u') && (loopStep == 0)) {
loopStep = 1;
spinner.setValue(spinner.getPreviousValue());
spinner.setValue(spinner.getPreviousValue());
System.out.println("Sunday Spinner going back 2");
}
if (loopStep == 1) {
loopStep = 2;
}
if (loopStep == 2) {
loopStep = 0;
}
}
});
setExtendedState(MAXIMIZED_BOTH);
setMinimumSize(new Dimension(1280, 485));
setSize(640, 485);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
@PostConstruct
private void skipWeekends(){
//skips weekends when program opens, skips weeks for some reason
Date date = (Date) spinner.getValue();
System.out.println("todays date " + date);
SimpleDateFormat sdf = new SimpleDateFormat("EEEEE, dd MMMMM, yyyy");
String stringDate = sdf.format(date);
System.out.println(stringDate);
char c = stringDate.charAt(0);
char c2 = stringDate.charAt(1);
if ((c == 'S') && (c2 == 'a')) {
spinner.setValue(spinner.getPreviousValue());
System.out.println("Saturday Spinner going back 2");
}
if ((c == 'S') && (c2 == 'u')) {
spinner.setValue(spinner.getPreviousValue());
spinner.setValue(spinner.getPreviousValue());
System.out.println("Sunday Spinner going back 2");
}
}
}
据我所知,微调器被设置为通过'Calendar.WEEK_OF_MONTH'增加/减少,所以当你调用'getNextValue'时,它会从当前值滚动一周 - 也许你应该创建一个'Calendar '并将其向前/向后滚动到您想要的那一天并使用它来设置微调器的值 – MadProgrammer
为什么它在changeListener中的stateChanged方法中有任何不同,它工作得很好?这让我感到困惑。我曾经想过要这样做,但我想我很接近解决这个问题,而不必更改一堆代码。如果没有其他事情出现,我会尝试这种方法。 –
你的微调旋转了一周 - 为什么它会让你感到惊讶? – MadProgrammer