Приложение е

Текст программы апплета

import java.util.*;

import java.awt.*;

import java.applet.*;

import java.text.*;

public class Clock2 extends Applet implements Runnable {

Thread timer; // The thread that displays clock

int lastxs, lastys, lastxm,

lastym, lastxh, lastyh; // Dimensions used to draw hands

SimpleDateFormat formatter; // Formats the date displayed

String lastdate; // String to hold date displayed

Font clockFaceFont; // Font for number display on clock

Date currentDate; // Used to get date to display

Color handColor; // Color of main hands and dial

Color numberColor; // Color of second hand and numbers

public void init() {

int x,y;

lastxs = lastys = lastxm = lastym = lastxh = lastyh = 0;

formatter = new SimpleDateFormat ("EEE MMM dd hh:mm:ss yyyy", Locale.getDefault());

currentDate = new Date();

lastdate = formatter.format(currentDate);

clockFaceFont = new Font("Serif", Font.PLAIN, 14);

handColor = Color.blue;

numberColor = Color.darkGray;

try {

setBackground(new Color(Integer.parseInt(getParameter("bgcolor"),16)));

} catch (Exception E) { }

try {

handColor = new Color(Integer.parseInt(getParameter("fgcolor1"),16));

} catch (Exception E) { }

try {

numberColor = new Color(Integer.parseInt(getParameter("fgcolor2"),16));

} catch (Exception E) { }

resize(300,300); // Set clock window size

}

// Plotpoints allows calculation to only cover 45 degrees of the circle,

// and then mirror

public void plotpoints(int x0, int y0, int x, int y, Graphics g) {

g.drawLine(x0+x,y0+y,x0+x,y0+y);

g.drawLine(x0+y,y0+x,x0+y,y0+x);

g.drawLine(x0+y,y0-x,x0+y,y0-x);

g.drawLine(x0+x,y0-y,x0+x,y0-y);

g.drawLine(x0-x,y0-y,x0-x,y0-y);

g.drawLine(x0-y,y0-x,x0-y,y0-x);

g.drawLine(x0-y,y0+x,x0-y,y0+x);

g.drawLine(x0-x,y0+y,x0-x,y0+y);

}

// Circle is just Bresenham's algorithm for a scan converted circle

public void circle(int x0, int y0, int r, Graphics g) {

int x,y;

float d;

x=0;

y=r;

d=5/4-r;

plotpoints(x0,y0,x,y,g);

while (y>x){

if (d<0) {

d=d+2*x+3;

x++;

}

else {

d=d+2*(x-y)+5;

x++;

y--;

}

plotpoints(x0,y0,x,y,g);

}

}

// Paint is the main part of the program

public void paint(Graphics g) {

int xh, yh, xm, ym, xs, ys, s = 0, m = 10, h = 10, xcenter, ycenter;

String today;

currentDate = new Date();

SimpleDateFormat formatter = new SimpleDateFormat("s",Locale.getDefault());

try {

s = Integer.parseInt(formatter.format(currentDate));

} catch (NumberFormatException n) {

s = 0;

}

formatter.applyPattern("m");

try {

m = Integer.parseInt(formatter.format(currentDate));

} catch (NumberFormatException n) {

m = 10;

}

formatter.applyPattern("h");

try {

h = Integer.parseInt(formatter.format(currentDate));

} catch (NumberFormatException n) {

h = 10;

}

formatter.applyPattern("EEE MMM dd HH:mm:ss yyyy");

today = formatter.format(currentDate);

xcenter=80;

ycenter=55;

// a= s* pi/2 - pi/2 (to switch 0,0 from 3:00 to 12:00)

// x = r(cos a) + xcenter, y = r(sin a) + ycenter

xs = (int)(Math.cos(s * 3.14f/30 - 3.14f/2) * 45 + xcenter);

ys = (int)(Math.sin(s * 3.14f/30 - 3.14f/2) * 45 + ycenter);

xm = (int)(Math.cos(m * 3.14f/30 - 3.14f/2) * 40 + xcenter);

ym = (int)(Math.sin(m * 3.14f/30 - 3.14f/2) * 40 + ycenter);

xh = (int)(Math.cos((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + xcenter);

yh = (int)(Math.sin((h*30 + m/2) * 3.14f/180 - 3.14f/2) * 30 + ycenter);

// Draw the circle and numbers

g.setFont(clockFaceFont);

g.setColor(handColor);

circle(xcenter,ycenter,50,g);

g.setColor(numberColor);

g.drawString("9",xcenter-45,ycenter+3);

g.drawString("3",xcenter+40,ycenter+3);

g.drawString("12",xcenter-5,ycenter-37);

g.drawString("6",xcenter-3,ycenter+45);

// Erase if necessary, and redraw

g.setColor(getBackground());

if (xs != lastxs || ys != lastys) {

g.drawLine(xcenter, ycenter, lastxs, lastys);

g.drawString(lastdate, 5, 125);

}

if (xm != lastxm || ym != lastym) {

g.drawLine(xcenter, ycenter-1, lastxm, lastym);

g.drawLine(xcenter-1, ycenter, lastxm, lastym); }

if (xh != lastxh || yh != lastyh) {

g.drawLine(xcenter, ycenter-1, lastxh, lastyh);

g.drawLine(xcenter-1, ycenter, lastxh, lastyh); }

g.setColor(numberColor);

g.drawString("", 5, 125);

g.drawString(today, 5, 125);

g.drawLine(xcenter, ycenter, xs, ys);

g.setColor(handColor);

g.drawLine(xcenter, ycenter-1, xm, ym);

g.drawLine(xcenter-1, ycenter, xm, ym);

g.drawLine(xcenter, ycenter-1, xh, yh);

g.drawLine(xcenter-1, ycenter, xh, yh);

lastxs=xs; lastys=ys;

lastxm=xm; lastym=ym;

lastxh=xh; lastyh=yh;

lastdate = today;

currentDate=null;

}

public void start() {

timer = new Thread(this);

timer.start();

}

public void stop() {

timer = null;

}

public void run() {

Thread me = Thread.currentThread();

while (timer == me) {

try {

Thread.currentThread().sleep(100);

} catch (InterruptedException e) {

}

repaint();

}

}

public void update(Graphics g) {

paint(g);

}

public String getAppletInfo() {

return "Title: A Clock \nAuthor: Rachel Gollub, 1995 \nAn analog clock.";

}

public String[][] getParameterInfo() {

String[][] info = {

{"bgcolor", "hexadecimal RGB number", "The background color. Default is the color of your browser."},

{"fgcolor1", "hexadecimal RGB number", "The color of the hands and dial. Default is blue."},

{"fgcolor2", "hexadecimal RGB number", "The color of the seconds hand and numbers. Default is dark gray."}

};

return info;

}

}