java课程设计:万年历系统的设计

import java.awt.*; import java.applet.*; import java.util.*; import java.net.*; class Hms extends Date //Hms类是进行时间换算的类 { public Hms(double localOffset){ //如果HTML文件中设置了时区，则把时间设为当地时区时间 super(); long tzOffset=getTimezoneOffset()*60L*1000L; localOffset *= 3600000.0; setTime(getTime() + tzOffset + (long)localOffset); } public Hms(){ //如果没有设置时区，则就使用当地的时间 super(); } public double get_hours() //时间换算，把如5:30这样的时间换算成5.5 { return (double)super.getHours()+(double)getMinutes()/60.0; } } abstract class ClockHand //绘制指针的抽象基类，同时提供将角度转换为坐标的方法 { protected int baseX[], baseY[]; protected int transX[],transY[]; protected int numberOfPoints; public ClockHand(int originX, int originY, int length,int thickness,int points){ baseX= new int[points]; baseY=new int[points]; transX= new int[points]; transY=new int[points]; initiallizePoints(originX,originY,length,thickness); numberOfPoints=points; } abstract protected void initiallizePoints( int originX, int originY, int length, int thickness); abstract public void draw(Color color, double angle, Graphics g); protected void transform(double angle) //通过角度计算出时针、分针、秒针的绘制位置 { for(int i=0;i<numberOfPoints;i++){ transX[i]=(int)((baseX[0]-baseX[i]) * Math.cos(angle) -(baseY[0]-baseY[i]) * Math.sin(angle) +baseX[0]); transY[i]=(int)((baseX[0]-baseX[i]) * Math.sin(angle) +(baseY[0]-baseY[i]) * Math.cos(angle) +baseY[0]); } } } class SweepHand extends ClockHand //秒针绘制使用的类 { public SweepHand(int originX,int originY, int length, int points) { super(originX,originY,length,0,points); } protected void initiallizePoints(int originX,int originY, int length, int unused) //初始化点 { baseX[0]=originX; baseY[0]=originY; baseX[1]=originX; baseY[1]=originY-length/5; baseX[2]=originX; baseY[2]=originY+length; } public void draw(Color color, double angle, Graphics g) //绘制秒针，为线段 { transform(angle); g.setColor(color); g.drawLine(transX[1],transY[1],transX[2],transY[2]); } } class HmHand extends ClockHand //分针时针使用的类 { public HmHand(int originX,int originY, int length,int thickness, int points){ super(originX,originY,length,thickness,points); } protected void initiallizePoints( int originX, //初始化点 int originY, int length, int thickness) { baseX[0]=originX; baseY[0]=originY; baseX[1]=baseX[0]-thickness/2; baseY[1]=baseY[0]+thickness/2; baseX[2]=baseX[1]; baseY[2]=baseY[0]+length- thickness; baseX[3]=baseX[0]; baseY[3]=baseY[0]+length; baseX[4]=baseX[0]+thickness/2; baseY[4]=baseY[2]; baseX[5]=baseX[4]; baseY[5]=baseY[1]; } public void draw(Color color,double angle, Graphics g) //绘制时针分针，为多边形 { transform(angle); g.setColor(color); g.fillPolygon(transX,transY,numberOfPoints); } } public class Clock extends Applet implements Runnable { //some DEFINE'd constants static final int BACKGROUND=0; //Background image index static final int LOGO=1; //Logo image index static final String JAVEX="J***X"; //Default text on clock face static final double MINSEC=0.104719755; //Radians per minute or second static final double HOUR=0.523598776; //Radians per hour Thread clockThread = null; //User options, see getParameterInfo(), below. int width = 100; int height = 100; Color bgColor = new Color(0,0,0); Color faceColor = new Color(0,0,0); Color sweepColor = new Color(255,0,0); Color minuteColor = new Color (192,192,192); Color hourColor = new Color (255,255,255); Color textColor = new Color (255,255,255); Color caseColor = new Color (0,0,0); Color trimColor = new Color (192,192,192); String logoString=null; Image images[] = new Image[2]; //Array to hold optional images boolean isPainted=false; //Force painting on first update, if not painted //Center point of clock int x1,y1; //Array of points for triangular icon at 12:00 int xPoints[]=new int[3], yPoints[]=new int[3]; //Class to hold time, with method to return (double)(hours + minutes/60) Hms cur_time; //The clock's seconds, minutes, and hours hands. SweepHand sweep; HmHand minuteHand, hourHand; //The last parameters used to draw the hands. double lastHour; int lastMinute,lastSecond; //The font used for text and date. Font font; //Offscreen image and device context, for buffered output. Image offScrImage; Graphics offScrGC; // Use to test background image, if any. MediaTracker tracker; int minDimension; // Ensure a round clock if applet is not square. int originX; // Upper left corner of a square enclosing the clock int originY; // with respect to applet area. double tzDifference=0; boolean localOnly=false; //Users' parameters - self-explanatory? public String[][] getParameterInfo() { String[][] info = { {"width", "int", "width of the applet, in pixels"}, {"height", "int", "height of the applet, in pixels"}, {"bgColor", "string", "hex color triplet of the background, i.e. 000000 for black <black>"}, {"faceColor", "string", "hex color triplet of clock face, i.e. 000000 for black <black>"}, {"sweepColor", "string", "hex color triplet of seconds hand, i.e. FF0000 for red <red>"}, {"minuteColor", "string", "hex color triplet of minutes hand, i.e. C0C0C0 for lt.gray <lt.gray>"}, {"hourColor", "string", "hex color triplet of hours hand, i.e. FFFFFF for white <white>"}, {"textColor", "string", "hex color triplet of numbers, etc., i.e. FFFFFF for white <white>"}, {"caseColor", "string", "hex color triplet of case, i.e. 000000 for black <black>"}, {"trimColor", "string", "hex color triplet of case outliners, i.e. C0C0C0 for lt.gray <lt.gray>"}, {"bgImageURL", "string", "URL of background image, if any <null>"}, {"logoString", "string", "Name to display on watch face <JAVEX>"}, {"logoImageURL","string", "URL of logo image to display on watch face <null>"}, {"timezone", "real", "Timezone difference from GMT (decimal hours,- West/+ East)<0>"}, {"localonly", "int", "Non-zero will cause clock to display current local time <0>"} }; return info; } //Applet name, author and info lines public String getAppletInfo() { return "billsClock 1.05 (C) 1996-98 by Bill Giel<bgiel@ct2.nai.net>"; } void showURLerror(Exception e) { String errorMsg = "JAVEX URL error: "+e; showStatus(errorMsg); System.err.println(errorMsg); } // This lets us create clocks of various sizes, but with the same // proportions. private int size(int percent) { return (int)((double)percent/100.0 * (double)minDimension); } public void init() {