GUI编程：简易生命计算器

import java.awt.BorderLayout;import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.text.SimpleDateFormat;import java.util.Calendar;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;/** * 【生命计算器】 功能实现：本程序用来计算个人从出生至目前的天数，充分利用GUI编程中的布局管理器进行布局，并使用日期处理技术计算日期。 *  * @================= * @Date:2014-4-17 * @author 何龙 * @QQ：471628912 * @since Lyloou@GaoSi * @================= */public class LifeCalculator extends JFrame implements ActionListener {private static final long serialVersionUID = 1L;JLabel labelTop = new JLabel("本程序用来计算个人生存天数", JLabel.CENTER);JLabel labelBottom = new JLabel("点击按钮进入查询入口", JLabel.CENTER);JLabel label1 = new JLabel("年"), label2 = new JLabel("   月"),label3 = new JLabel("   日");JPanel panel, panel1, panel2, panel3, panel21, panel22, panel23, panel221,panel222, panel223;JTextField yearInput, monthInput, dayInput;JLabel todayLabel, birthdayLabel, lifeLabel;JButton button1, button2;boolean flag = true;int finalYear, finalMonth, finalDay;// checkTime后值传给这三个变量，并进一步doFinalCalc();public LifeCalculator() {this.setSize(800, 325);this.setLocation(200, 200);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);labelTop.setFont(new Font("Kaiti", Font.BOLD, 28));labelTop.setOpaque(true);// 此句很重要设置JLabel可以更改背景颜色labelTop.setBackground(new Color(135, 206, 250));labelBottom.setFont(new Font("Kaiti", Font.BOLD, 30));labelBottom.setOpaque(true);labelBottom.setBackground(new Color(135, 206, 250));this.add(labelTop, BorderLayout.NORTH);this.add(labelBottom, BorderLayout.SOUTH);panel = new JPanel();this.add(panel, BorderLayout.CENTER);panelLayout();this.setResizable(false);this.setVisible(true); // 设置可见性}public void panelLayout() {panel1 = new JPanel();panel2 = new JPanel();panel3 = new JPanel();panel.setLayout(null);panel1.setBounds(0, 0, this.getWidth(), 38);panel2.setBounds(0, 38, this.getWidth(), 174);panel3.setBounds(0, 212, this.getWidth(), 25);panel.add(panel1);panel.add(panel2);panel.add(panel3);panel1Layout();panel2Layout();panel3Layout();}public void panel1Layout() {label1.setFont(new Font("Kaiti", Font.BOLD, 28));label2.setFont(new Font("Kaiti", Font.BOLD, 28));label3.setFont(new Font("Kaiti", Font.BOLD, 28));panel1.setBackground(Color.yellow);yearInput = new JTextField(6);monthInput = new JTextField(6);dayInput = new JTextField(6);panel1.add(label1);panel1.add(yearInput);panel1.add(label2);panel1.add(monthInput);panel1.add(label3);panel1.add(dayInput);}public void panel3Layout() {panel3.setBackground(Color.yellow);}public void panel2Layout() {panel21 = new JPanel();panel22 = new JPanel();panel23 = new JPanel();panel2.setLayout(null);// 注意panel2的布局运用等比例划分panel21.setBounds(0, 0, (int) (panel2.getWidth() * 0.2),panel2.getHeight());panel22.setBounds((int) (this.getWidth() * 0.2), 0,(int) (this.getWidth() * 0.6), panel2.getHeight());panel23.setBounds((int) (this.getWidth() * 0.8), 0,(int) (this.getWidth() * 0.2), panel2.getHeight());panel2.add(panel21);panel2.add(panel22);panel2.add(panel23);panel21Layout();panel22Layout();panel23Layout();}public void panel21Layout() {button1 = new JButton("农历查询入口");button1.setFont(new Font("Kaiti", Font.BOLD, 25));panel21.setLayout(new GridLayout(1, 1));// 让一个按钮填充到一个panel里面panel21.add(button1);panel21.setBackground(Color.yellow);button1.addActionListener(this);}public void panel23Layout() {button2 = new JButton("公历查询入口");button2.setFont(new Font("Kaiti", Font.BOLD, 25));panel23.setLayout(new GridLayout(1, 1));panel23.add(button2);panel23.setBackground(Color.yellow);// button2.setOpaque(true); //这些对button的处理暂时不能用，原因以后深究// button2.setBackground(Color.YELLOW);// button2.setForeground(Color.black);button2.addActionListener(this);}public void panel22Layout() {panel22.setBackground(Color.yellow);// 设置panel222布局panel22.setLayout(null);panel221 = new JPanel();panel222 = new JPanel();panel223 = new JPanel();panel221.setBounds(7, 9, panel22.getWidth() - 14,(int) (panel22.getHeight() * (1 / 3.0)) - 11);panel222.setBounds(7, (int) (panel22.getHeight() * (1 / 3.0)) + 4,panel22.getWidth() - 14,(int) (panel22.getHeight() * (1 / 3.0)) - 11);panel223.setBounds(7, (int) (panel22.getHeight() * (2 / 3.0)),panel22.getWidth() - 14,(int) (panel22.getHeight() * (1 / 3.0)) - 11);panel22.add(panel221);panel22.add(panel222);panel22.add(panel223);panel221Layout();panel222Layout();panel223Layout();}public void panel221Layout() {panel221.setLayout(new GridLayout(1, 1));todayLabel = new JLabel("请输入出生年月日", JLabel.CENTER);todayLabel.setFont(new Font("Kaiti", Font.BOLD, 30));todayLabel.setOpaque(true);// 一定要设置label的颜色可被操作才能对label的背景色进行更改todayLabel.setBackground(Color.LIGHT_GRAY);panel221.add(todayLabel);}private void panel222Layout() {panel222.setLayout(new GridLayout(1, 1));birthdayLabel = new JLabel("输入完成后,请按'查询'按钮", JLabel.CENTER);birthdayLabel.setFont(new Font("Kaiti", Font.BOLD, 30));birthdayLabel.setOpaque(true);birthdayLabel.setBackground(Color.lightGray);panel222.add(birthdayLabel);}private void panel223Layout() {panel223.setLayout(new GridLayout(1, 1));lifeLabel = new JLabel("来吧,试试吧", JLabel.CENTER);lifeLabel.setFont(new Font("Kaiti", Font.BOLD, 30));lifeLabel.setOpaque(true);lifeLabel.setBackground(Color.LIGHT_GRAY);panel223.add(lifeLabel);}public void actionPerformed(ActionEvent e) {if (e.getSource() == button2) {birthdayLabel.setBackground(Color.pink);todayLabel.setBackground(Color.pink);lifeLabel.setBackground(Color.pink);doBirthdayCalc();}// 农历时间处理，应熟练掌握日期处理技术if (e.getSource() == button1) {birthdayLabel.setBackground(new Color(205, 173, 0));todayLabel.setBackground(new Color(205, 173, 0));lifeLabel.setBackground(new Color(205, 173, 0));doBirthdayCalc();}}// ========================================================public void doBirthdayCalc() {try { // try语句中只获取数字，如果不是数字那么doError();int year = Integer.parseInt(yearInput.getText());int month = Integer.parseInt(monthInput.getText());int day = Integer.parseInt(dayInput.getText());checkTime(year, month, day);} catch (Exception e) {doError();}// doerror代码} // 一定要熟练掌握异常处理，通过抛出异常省略了大量check代码！！// ====================================================public void checkTime(int year, int month, int day) {checkMonth(month);checkDay(day, month, year);if (flag)doFinalCalc(year, finalMonth, finalDay); // CheckTime后最终都要执行doFinalCalc()?这句如何超控？}private void checkDay(int theDay, int theMonth, int theYear) {int daysPerMonth[] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30,31 };if (theDay > 0 && (theDay <= daysPerMonth[theMonth])) {finalDay = theDay;flag = true;} else if (theDay == 29&& (theYear % 400 == 0 || (theYear % 4 == 0 && theYear % 100 != 0))) {finalDay = theDay;flag = true;} else {doError();flag = false;}}private void checkMonth(int theMonth) {if (theMonth > 0 && theMonth <= 12) {finalMonth = theMonth;flag = true;} else {doError();flag = false;}}public void doError() {todayLabel.setText("请输入正确的格式!");birthdayLabel.setText("请保证是正确的时间!");lifeLabel.setText("谢谢合作!");birthdayLabel.setBackground(new Color(165, 42, 42));todayLabel.setBackground(new Color(165, 42, 42));lifeLabel.setBackground(new Color(165, 42, 42));}public void doFinalCalc(int year, int month, int day) {Calendar birthday = Calendar.getInstance();Calendar today = Calendar.getInstance();birthday.set(year, month - 1, day);long a = (today.getTimeInMillis() - birthday.getTimeInMillis())/ (60 * 60 * 24 * 1000);int age = (int) (a / (365));this.todayLabel.setText(("今天日期: " + new SimpleDateFormat(("yyyy-MM-dd")).format(today.getTime())));this.birthdayLabel.setText(("出生日期: " + new SimpleDateFormat(("yyyy-MM-dd")).format(birthday.getTime())));this.lifeLabel.setText(("已经生存: \"" + age + "\"年, \"" + a + "\"天"));}// 测试入口public static void main(String args[]) {new LifeCalculator();}}