Java究竟怎么玩？

這是一個(gè)Java版的世界時(shí)鐘示例，移植自Gerrit創(chuàng)建的同名Swing應(yīng)用（http://www.jug-muenster.de/swing-worldclock-427 ），需要運(yùn)行在JRE1.5或以上環(huán)境當(dāng)中。

移植此示例主要是因?yàn)榍耙魂囈浦策^(guò)Gerrit的swing原子鐘示例，所謂好事成雙，這個(gè)世界時(shí)鐘的示例自然不能放過(guò)（話說(shuō)Gerrit為什么那么喜歡做時(shí)鐘？……），畢竟Java桌面應(yīng)用實(shí)例本就不多，但凡有參考價(jià)值的還是要多做匯總才好。

另外，此示例中關(guān)于多時(shí)區(qū)的分辨與顯示部分，在非桌面應(yīng)用中也具備一定的參考價(jià)值。

PS:由于此示例以LGame-Simple-0.2.5開(kāi)發(fā)，所以也可以看作是世界時(shí)鐘的AWT實(shí)現(xiàn)。

下載地址（源碼在jar中）：http://loon-simple.googlecode.com/files/WorldClock.7z

運(yùn)行代碼如下所示（構(gòu)建過(guò)程省略了Swing原版的一些步驟）：

package org.loon.test; import java.awt.Graphics2D; import java.awt.event.KeyEvent; import java.awt.event.MouseEvent; import java.awt.image.BufferedImage; import org.loon.framework.game.simple.GameScene; import org.loon.framework.game.simple.core.graphics.Deploy; import org.loon.framework.game.simple.core.graphics.Screen; import org.loon.framework.game.simple.utils.GraphicsUtils; /** * Copyright 2008 - 2009 * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. * * @project loonframework * @author chenpeng * @email：ceponline@yahoo.com.cn * @version 0.1 */ public class Main extends Screen { // 此示例移植自http://www.jug-muenster.de/swing-worldclock-427/同名應(yīng)用 public Main() { // 設(shè)置窗體背景 this.setBackground(createBackgroundImage()); // 創(chuàng)建時(shí)間精靈 AnalogClock clock1 = new AnalogClock(City.Beijing, 25, 18, 74, 74); AnalogClock clock2 = new AnalogClock(City.NewYork, 25, 108, 74, 74); AnalogClock clock3 = new AnalogClock(City.SanFrancisco, 25, 198, 74, 74); AnalogClock clock4 = new AnalogClock(City.Dakka, 25, 288, 74, 74); // 添加精靈 this.add(clock1); this.add(clock2); this.add(clock3); this.add(clock4); } public void draw(Graphics2D g) { } /** * 創(chuàng)建背景圖案 * * @return */ private BufferedImage createBackgroundImage() { final java.awt.image.BufferedImage IMAGE = GraphicsUtils.createImage( getWidth(), getHeight(), java.awt.Transparency.TRANSLUCENT); java.awt.Graphics2D g2 = IMAGE.createGraphics(); g2.setRenderingHint(java.awt.RenderingHints.KEY_ANTIALIASING, java.awt.RenderingHints.VALUE_ANTIALIAS_ON); java.awt.geom.Point2D BACKGROUND_START = new java.awt.geom.Point2D.Double( 0, 0); java.awt.geom.Point2D BACKGROUND_STOP = new java.awt.geom.Point2D.Double( 0, getHeight()); final float[] BACKGROUND_FRACTIONS = { 0.0f, 1.0f }; final java.awt.Color[] BACKGROUND_COLORS = { new java.awt.Color(0x505652), new java.awt.Color(0x393E3A) }; final java.awt.Shape BACKGROUND = new java.awt.geom.RoundRectangle2D.Double( 0, 0, getWidth(), getHeight(), 5, 5); final java.awt.LinearGradientPaint BACKGROUND_GRADIENT = new java.awt.LinearGradientPaint( BACKGROUND_START, BACKGROUND_STOP, BACKGROUND_FRACTIONS, BACKGROUND_COLORS); g2.setPaint(BACKGROUND_GRADIENT); g2.fill(BACKGROUND); java.awt.geom.Point2D INNER_BACKGROUND_START = new java.awt.geom.Point2D.Double( 0, 10); java.awt.geom.Point2D INNER_BACKGROUND_STOP = new java.awt.geom.Point2D.Double( 0, getHeight() - 10); final float[] INNER_BACKGROUND_FRACTIONS = { 0.0f, 1.0f }; final java.awt.Color[] INNER_BACKGROUND_COLORS = { new java.awt.Color(0x4D5651), new java.awt.Color(0x393E3A) }; final java.awt.Shape INNER_BACKGROUND = new java.awt.geom.RoundRectangle2D.Double( 10, 10, getWidth() - 20, getHeight() - 20, 5, 5); final java.awt.LinearGradientPaint INNER_BACKGROUND_GRADIENT = new java.awt.LinearGradientPaint( INNER_BACKGROUND_START, INNER_BACKGROUND_STOP, INNER_BACKGROUND_FRACTIONS, INNER_BACKGROUND_COLORS); g2.setPaint(INNER_BACKGROUND_GRADIENT); g2.fill(INNER_BACKGROUND); g2.setColor(new java.awt.Color(0x2F362E)); g2.drawLine(10, 10, 10, getHeight() - 10); g2.drawLine(getWidth() - 10, 10, getWidth() - 10, getHeight() - 10); g2.drawLine(10, 10, getWidth() - 10, 10); g2.setColor(new java.awt.Color(0x6B7167)); g2.drawLine(10, getHeight() - 10, getWidth() - 10, getHeight() - 10); g2.dispose(); return IMAGE; } public void leftClick(MouseEvent e) { } public void middleClick(MouseEvent e) { } public void rightClick(MouseEvent e) { } public void onKey(KeyEvent e) { } public void onKeyUp(KeyEvent e) { } public static void main(String[] args) { GameScene frame = new GameScene("Java版世界時(shí)鐘", 398, 391); Deploy deploy = frame.getDeploy(); deploy.setScreen(new Main()); deploy.setShowFPS(true); deploy.setLogo(false); deploy.setFPS(100); deploy.mainLoop(); frame.showFrame(); } }

以下為運(yùn)行效果：

下載地址（源碼在jar中） ：http://loon-simple.googlecode.com/files/WorldClock.7z