2

我需要从 JSpinner 获得价值。

private JSpinner[] timeSpinner;
private SimpleDateFormat format = new SimpleDateFormat("HH:mm:ss");

Date time = new Date();
try {
  time = format.parse(timeSpinner[i].getValue().toString());
} catch (ParseException e) {
  e.printStackTrace();
}
data[i] = time.toString();
System.out.println(data[i]);

错误信息：

java.text.ParseException: Unparseable date: "Thu Jan 01 01:05:00 CET 1970"
4

2 回答 2

4

我看不出有任何强制转换和解析的原因，您必须阅读有关JSpinners的教程并为实例设置SpinnerDateModelJSpinner，然后您就不需要解决解析/强制转换Date实例JSpinner

简单的例子

在此处输入图像描述

import java.awt.*;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;

public class TimeZoneSpinners {

    private final String[] zones = {"Asia/Tokyo", "Asia/Hong_Kong",
        "Asia/Calcutta", "Europe/Paris", "Europe/London",
        "America/New_York", "America/Los_Angeles"
    };
    private final JLabel[] labels = new JLabel[zones.length];
    private final SimpleDateFormat[] formats = new SimpleDateFormat[zones.length];
    private JSpinner spinner;
    private SpinnerDateModel model;
    private SimpleDateFormat format;
    private JPanel panel;
    private JFrame frame = new JFrame();

    public void makeUI() {
        Calendar cal = Calendar.getInstance();
        Date date = cal.getTime();
        model = new SpinnerDateModel();
        model.setValue(date);
        spinner = new JSpinner(model);
        spinner.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                Date date = (Date) ((JSpinner) e.getSource()).getValue();
                for (int i = 0; i < labels.length; i++) {
                    labels[i].setText(formats[i].format(date));
                }
            }
        });
        format = ((JSpinner.DateEditor) spinner.getEditor()).getFormat();
        format.setTimeZone(TimeZone.getTimeZone(zones[0]));
        format.applyPattern("yyyy-MM-dd HH:mm:ss");
        panel = new JPanel(new GridLayout(zones.length, 2, 10, 10));
        for (int i = 0; i < zones.length; i++) {
            formats[i] = new SimpleDateFormat("yyyy-MMM-dd HH:mm:ss");
            formats[i].setTimeZone(TimeZone.getTimeZone(zones[i]));
            JLabel label = new JLabel(zones[i]);
            labels[i] = new JLabel(formats[i].format(date));
            panel.add(label);
            panel.add(labels[i]);
        }
        frame.setLayout(new BorderLayout(10, 10));
        frame.add(spinner, BorderLayout.NORTH);
        frame.add(panel, BorderLayout.CENTER);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TimeZoneSpinners().makeUI();
            }
        });
    }
}
于 2012-02-07T14:03:32.437 回答
3

您创建的 SimpleDateFormat 的格式与您尝试解析的日期不同：

new SimpleDateFormat("HH:mm:ss");

Thu Jan 01 01:05:00 CET 1970

看看SimpleDateFormat 文档

编辑：实际上再看一遍，看起来你已经有了一个 Date 对象，为什么不直接使用它呢？

time = (Date)timeSpinner[i].getValue();

为了将您拥有的日期转换为字符串，您只需执行上述操作即可获取日期，然后执行

String formattedDate = format.format(time);
于 2012-02-07T13:07:52.510 回答