用户在 Java swing 中选择未来日期的最佳方式是什么？有什么好的免费可用的库可以让我做到这一点吗？
问问题
17274 次
3 回答
6
SwingX库有很多不错的组件，包括优秀的日期选择器
于 2011-07-20T00:15:11.453 回答
1
我在 2004 年在大学里写了这段代码。它都是在 Java Swing 中的。随意把它删掉。我为我的大学编写了一些调度软件来支付 2500 美元的账单。:-)
import java.io.*;
import java.util.*;
import java.text.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.table.*;
import javax.swing.event.*;
import javax.swing.Timer;
import sun.audio.*;
/**
* This class contains the graphic user interface for the WantaRide application
*/
public class WantaRide extends JFrame implements ActionListener {
......继续新文件对话框............
class NewFileDialog extends JDialog implements ItemListener, ActionListener {
/* These are dropdown for the start date */
private JComboBox startYear, startMonth, startDay;
/* These are the dropdowns for the end date */
private JComboBox endYear, endMonth, endDay;
/* These are all explicit text fields */
private JTextField usernameText, sourceFileText, newFileText;
/* These are the actual File objects for the source (Excel file) and new (WantaRide file) */
private File sourceFile = null, newFile = null;
/* This is the label for the source file */
private JLabel sourceFileLabel;
/* These are password fields for the administrator login and password */
private JPasswordField passwordText, confirmText;
/* This is the button to get a file chooser to select the Excel source file */
private JButton sourceFileButton;
/* This is the start date used for the date dropdowns */
private Calendar startDate = Calendar.getInstance();
/* This is the end date used for the date dropdowns */
private Calendar endDate = Calendar.getInstance();
/**
* This method sets up the New File Dialog window
*/
public NewFileDialog() {
super(WantaRide.this, "New WantaRide File", true);
JPanel datesPanel = new JPanel();
datesPanel.setBorder(BorderFactory.createTitledBorder
("Dates of New Semester"));
JPanel datesInnerPanel = new JPanel(new GridLayout(2, 4, 10, 10));
JLabel startDateLabel = new JLabel("Start Date: ", SwingConstants.RIGHT);
startYear = new JComboBox();
buildYearsList(startYear);
startYear.setSelectedIndex(5);
startMonth = new JComboBox();
buildMonthsList(startMonth);
startMonth.setSelectedIndex(startDate.get(Calendar.MONTH));
startDay = new JComboBox();
buildDaysList(startDate, startDay, startMonth);
startDay.setSelectedItem(Integer.toString(startDate.get(Calendar.DATE)));
startYear.addItemListener(this);
startMonth.addItemListener(this);
startDay.addItemListener(this);
datesInnerPanel.add(startDateLabel);
datesInnerPanel.add(startMonth);
datesInnerPanel.add(startDay);
datesInnerPanel.add(startYear);
JLabel endDateLabel = new JLabel("End Date: ", SwingConstants.RIGHT);
endYear = new JComboBox();
buildYearsList(endYear);
endYear.setSelectedIndex(5);
endMonth = new JComboBox();
buildMonthsList(endMonth);
endMonth.setSelectedIndex(endDate.get(Calendar.MONTH));
endDay = new JComboBox();
buildDaysList(endDate, endDay, endMonth);
endDay.setSelectedItem(Integer.toString(endDate.get(Calendar.DATE)));
endYear.addItemListener(this);
endMonth.addItemListener(this);
endDay.addItemListener(this);
datesInnerPanel.add(endDateLabel);
datesInnerPanel.add(endMonth);
datesInnerPanel.add(endDay);
datesInnerPanel.add(endYear);
datesPanel.add(datesInnerPanel, BorderLayout.CENTER);
JPanel adminPanel = new JPanel();
adminPanel.setBorder(BorderFactory.createTitledBorder
("Administrator Access"));
JPanel adminInnerPanel = new JPanel();
JLabel usernameLabel = new JLabel("Username: ", SwingConstants.RIGHT);
JLabel passwordLabel = new JLabel("Password: ", SwingConstants.RIGHT);
JLabel confirmLabel = new JLabel("Confirm Password: ", SwingConstants.RIGHT);
usernameText = new JTextField("Administrator", 15);
usernameText.setEnabled(false);
passwordText = new JPasswordField("", 15);
confirmText = new JPasswordField("", 15);
adminInnerPanel.setLayout(new GridLayout(3, 2));
adminInnerPanel.add(usernameLabel);
adminInnerPanel.add(usernameText);
adminInnerPanel.add(passwordLabel);
adminInnerPanel.add(passwordText);
adminInnerPanel.add(confirmLabel);
adminInnerPanel.add(confirmText);
adminPanel.add(adminInnerPanel, BorderLayout.CENTER);
JPanel topPanel = new JPanel(new GridLayout(1, 2, 10, 10));
topPanel.add(datesPanel);
topPanel.add(adminPanel);
JPanel filePanel = new JPanel(new GridLayout(2, 1, 0, 0));
filePanel.setBorder(BorderFactory.createTitledBorder
("Associated Files"));
JPanel sourceFilePanel = new JPanel();
sourceFileLabel = new JLabel("Source File: ", SwingConstants.RIGHT);
JPanel sourceButtonPanel = new JPanel();
sourceFileButton = new JButton("Browse...");
sourceFileButton.setActionCommand("SourceFileButton");
sourceFileButton.addActionListener(this);
sourceButtonPanel.add(sourceFileButton, BorderLayout.CENTER);
sourceFileText = new JTextField("", 80);
sourceFileText.setEditable(false);
sourceFilePanel.add(sourceFileLabel);
sourceFilePanel.add(sourceButtonPanel);
sourceFilePanel.add(sourceFileText);
JPanel newFilePanel = new JPanel();
JLabel newFileLabel = new JLabel("New File: ", SwingConstants.RIGHT);
JPanel newButtonPanel = new JPanel();
JButton newFileButton = new JButton("Browse...");
newFileButton.setActionCommand("NewFileButton");
newFileButton.addActionListener(this);
newButtonPanel.add(newFileButton, BorderLayout.CENTER);
newFileText = new JTextField("", 80);
newFileText.setEditable(false);
Dimension dim2 = new Dimension(7, 7);
newFilePanel.add(new Box.Filler(dim2, dim2, dim2));
newFilePanel.add(newFileLabel);
newFilePanel.add(newButtonPanel);
newFilePanel.add(newFileText);
filePanel.add(sourceFilePanel);
filePanel.add(newFilePanel);
JPanel buttonPanel = new JPanel();
JPanel twoButtonsPanel = new JPanel();
JButton okButton = new JButton("Create WantaRide File");
okButton.setActionCommand("OK");
okButton.addActionListener(this);
JLabel adviceLabel = new JLabel(" This button may stay depressed for a few seconds. Please be patient.");
twoButtonsPanel.add(adviceLabel);
twoButtonsPanel.add(okButton);
buttonPanel.add(twoButtonsPanel);
JPanel bottomPanel = new JPanel(new BorderLayout());
bottomPanel.add("Center", filePanel);
bottomPanel.add("South", buttonPanel);
JPanel centerPanel = new JPanel(new BorderLayout());
centerPanel.add("Center", topPanel);
centerPanel.add("South", bottomPanel);
getContentPane().setLayout(new BorderLayout());
Dimension dim = new Dimension(10, 10);
getContentPane().add("North", new Box.Filler(dim, dim, dim));
getContentPane().add("West", new Box.Filler(dim, dim, dim));
getContentPane().add("Center", centerPanel);
getContentPane().add("East", new Box.Filler(dim, dim, dim));
getContentPane().add("South", new Box.Filler(dim, dim, dim));
pack();
double parentWidth = WantaRide.this.getSize().getWidth();
double parentHeight = WantaRide.this.getSize().getHeight();
double dialogWidth = this.getSize().getWidth();
double dialogHeight = this.getSize().getHeight();
setLocation((int)(parentWidth / 2 - dialogWidth / 2),
(int)(parentHeight / 2 - dialogHeight / 2));
setResizable(false);
setVisible(true);
}
/**
* This method builds the list of years for the start
* date and end date of the semester
* @param yearsList The combo box containing the years
*/
private void buildYearsList(JComboBox yearsList) {
int currentYear = startDate.get(Calendar.YEAR);
for (int yearCount = currentYear - 5; yearCount <= currentYear + 5; yearCount++)
yearsList.addItem(Integer.toString(yearCount));
}
/**
* This method builds the list of months for the start
* date and end date of the semester
* @param monthsList The combo box containing the months
*/
private void buildMonthsList(JComboBox monthsList) {
monthsList.removeAllItems();
for (int monthCount = 0; monthCount < 12; monthCount++)
monthsList.addItem(Const.MONTHS[monthCount]);
}
/**
* This method builds the list of years for the start
* date and end date of the semester
* @param dateIn The current date, which will be used for
* the initial date of the lists
* @param daysList The combo box that will contain the days
* @param monthsList The combo box that will contain the months
*/
private void buildDaysList(Calendar dateIn, JComboBox daysList, JComboBox monthsList) {
daysList.removeAllItems();
dateIn.set(Calendar.MONTH, monthsList.getSelectedIndex());
int lastDay = startDate.getActualMaximum(Calendar.DAY_OF_MONTH);
for (int dayCount = 1; dayCount <= lastDay; dayCount++)
daysList.addItem(Integer.toString(dayCount));
}
/**
* This method is called when a dropdown selection
* changes
* @param event This occurs when a dropdown changes values
*/
public void itemStateChanged(ItemEvent event) {
if (event.getSource() == startYear &&
event.getStateChange() == ItemEvent.SELECTED) {
int year = Integer.parseInt((String)startYear.getSelectedItem());
startDate.set(Calendar.YEAR, year);
startMonth.setSelectedIndex(0);
startDate.set(Calendar.MONTH, 0);
buildDaysList(startDate, startDay, startMonth);
startDate.set(Calendar.DATE, 1);
}
else if (event.getSource() == startMonth &&
event.getStateChange() == ItemEvent.SELECTED) {
startDate.set(Calendar.MONTH, startMonth.getSelectedIndex());
buildDaysList(startDate, startDay, startMonth);
startDate.set(Calendar.DATE, 1);
}
else if (event.getSource() == startDay &&
event.getStateChange() == ItemEvent.SELECTED) {
int day = Integer.parseInt((String)startDay.getSelectedItem());
startDate.set(Calendar.DATE, day);
}
else if (event.getSource() == endYear &&
event.getStateChange() == ItemEvent.SELECTED) {
int year = Integer.parseInt((String)endYear.getSelectedItem());
endDate.set(Calendar.YEAR, year);
endMonth.setSelectedIndex(0);
endDate.set(Calendar.MONTH, 0);
buildDaysList(endDate, endDay, endMonth);
endDate.set(Calendar.DATE, 1);
}
else if (event.getSource() == endMonth &&
event.getStateChange() == ItemEvent.SELECTED) {
endDate.set(Calendar.MONTH, endMonth.getSelectedIndex());
buildDaysList(endDate, endDay, endMonth);
endDate.set(Calendar.DATE, 1);
}
else if (event.getSource() == endDay &&
event.getStateChange() == ItemEvent.SELECTED) {
int day = Integer.parseInt((String)endDay.getSelectedItem());
endDate.set(Calendar.DATE, day);
}
}
于 2011-07-20T00:20:45.067 回答