JAVA : Analog Clock

JAVA Analog Clock 

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Java code spot has come up with a simple analog clock written in Java. It comes as an applet, as well with the source code.  


For making the analog clock we have some mathematics calculations to find out the points  where the clock's parts like hands, digits will get paint. The Java program calculates the point positions on the bases of angle and the time. For example every second the clock's hand will move six degrees. In radian the 6 degrees is equal to 0.1047. So if we want the minutes hand to be on 15 minutes than we can can calculate that it should be placed on the angle of  0.1047*15 radians.


Here is the code to calculate points for painting clock:

int h=40;  //radius of clock Calendar now = Calendar.getInstance(); //creating a Calendar variable for getting current time   x=100;              y=100;     theta=-0.1047;     theta=theta*now.get(Calendar.SECOND);    int  p=  (int) (Math.sin(theta) * h);    int b=  (int) (Math.cos(theta) * h);     x=x-p;     y=y-b;

This Java Analog Clock can be dragged with mouse form one location to another.


Code for Creating Clock:-

import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.*; public class Clock extends Frame implements MouseMotionListener{ int xmou=200; //set the center of circle int ymou=200; //set the center of circle double theta=-0.1047; //theta for second's hand int x=xmou; //x position of Second's hand int y=ymou; //y position of second's hand int p,b; //perpendicular and base of Second's hand int h; //hypotenous(heigth) of clock's hand double the= -0.1047; //theta for creating outer circle double thetamin=-0.1047;        //theta for minutes hand int xm=xmou; //x position of minute's hand int ym=ymou; //y position of minute's hand int pmin,bmin; //perpendicular and base of Minute's hand double thetah=-0.1047;         //theta for hour hand int xh=xmou; //y position of hour's hand int yh=ymou; //y position of hour's hand int ph,bh; //perpendicular and base of hour's hand double thetan=-0.0;          //theta for numbers of clock int xn=xmou; //x position of Clock numbers int yn=ymou; //y position of Clock numbers int pn,bn; //perpendicular and base of clock numbers int num=0; //for writing the numbers //constructor Clock(){ super(); setSize(500,500); setBackground(Color.PINK); setVisible(true); addMouseMotionListener(this); } //method of implemented  mouse interface public void mouseMoved(MouseEvent me){ } public void mouseDragged(MouseEvent me){ xmou=me.getX(); //changing the clock position on mouse drag ymou=me.getY(); //changing the clock position on mouse drag } //method to paint clock public void paint(Graphics g){                   //for writing numbers in clock and outer circle for(int p=0;p<60;p++){            int xocir=xmou;      //x position of outer circle      int yocir=ymou;      //y position of outer circle      int pocir,bocir;     //perpendicular and base of outer circle             pocir=  (int) (Math.sin(the) * (h+23));             bocir=  (int) (Math.cos(the) * (h+23));             xocir=xocir-pocir;             yocir=yocir-bocir;             the=the - 0.1047;                  g.setColor(Color.BLUE);          g.drawLine(xocir+5,yocir+5,xocir,yocir);                 g.setColor(Color.BLACK); if(p%5==0 ){ num++; if(num>12){  num=1; } xn=xmou;      yn=ymou; if(thetan<=-6.28318531 ){ thetan=0.0; } thetan=thetan-0.523598776 ;      pn=  (int) (Math.sin(thetan) * (h+10));      bn=  (int) (Math.cos(thetan) * (h+10));      xn=xn-pn;      yn=yn-bn; g.drawString(""+num,xn-3,yn+5);    }            }         //for drawing Clock hands      g.setColor(Color.BLACK);         g.drawLine(xmou,ymou,xm,ym); //drawing minute's hand      g.drawLine(xmou,ymou,xh,yh); //drawing hour's hand         g.setColor(Color.RED);      g.drawLine(xmou,ymou,x,y); //drawing second's hand            }  public void newpoint(){     Calendar now = Calendar.getInstance(); //creating a Calendar variable for getting current time     //for second hand     x=xmou;     y=ymou;     theta=-0.1047;     theta=theta*now.get(Calendar.SECOND);     p=  (int) (Math.sin(theta) * h);     b=  (int) (Math.cos(theta) * h);     x=x-p;     y=y-b;     //theta=theta - 0.1047;   //for minutes hand     xm=xmou;     ym=ymou;     thetamin=-0.1047;     thetamin=thetamin*now.get(Calendar.MINUTE);     pmin=  (int) (Math.sin(thetamin) * (h-6));     bmin=  (int) (Math.cos(thetamin) * (h-6));     xm=xm-pmin;     ym=ym-bmin;     //for hour's hand     xh=xmou;     yh=ymou;     thetah=-0.1047;     thetah=thetah*now.get(Calendar.HOUR)*5;    if (now.get(Calendar.MINUTE)>=12 && now.get(Calendar.MINUTE)<24){   thetah=thetah-0.1047;    }    else if(now.get(Calendar.MINUTE)>=24 && now.get(Calendar.MINUTE)<36){   thetah=thetah-(2*0.1047);    }    else if(now.get(Calendar.MINUTE)>=36 && now.get(Calendar.MINUTE)<48){   thetah=thetah-(3*0.1047);    }    else if(now.get(Calendar.MINUTE)>=48 && now.get(Calendar.MINUTE)<60){   thetah=thetah-(4*0.1047);    }     ph=  (int) (Math.sin(thetah) * (h-15));     bh=  (int) (Math.cos(thetah) * (h-15));     xh=xh-ph;     yh=yh-bh;  }       public static void main(String[] args) {              Clock m=new Clock();         m.h=60;               while(true){             m.newpoint();          m.repaint();          try{      Thread.sleep(6);      }catch(Exception e){           }           }     } }