Java implementation of the simple clock

There are many drawbacks, such as not a time trigger but a thread hang

package com.zhou.clock;


import java.awt.*;


import java.awt.geom.*;


import javax.swing.*;


import Java.lang.Math;


import java.util.Date;


public class Clock extends JFrame {


Clockpane CP;


public Clock () {


super ("clock");


setdefaultcloseoperation (exit_on_close);


cp=new Clockpane ();


Cp.inittime ();


//container Content=getcontentpane ();


//content.add (CP);


Setcontentpane (CP);//This sentence can be replaced by the above two sentences


setbounds (400,400,200,220);


setresizable (FALSE);


setvisible (TRUE);


}


public void interval () {


while (true) {


try{thread.sleep (1000);}


catch (Exception e) {


}


Cp.drawclock (Cp.getgraphics ());


}


}


public static void Main (string[] args) {


Clock clock=new Clock ();


Clock.interval ();


}


class Clockpane extends jpanel{


double Secondradian;


double Minuteradian;


double Hourradian;


public void Paintcompnent (Graphics comp) {


Drawclock (comp);


}


public void Inittime () {


Date D=new date ();


int hours=d.gethours ();


int minutes=d.getminutes ();


int seconds=d.getseconds ();


HOURRADIAN=HOURS*MATH.PI/6 + ((float) minutes/60) *MATH.PI/6;


Minuteradian=minutes*math.pi/30;


Secondradian=seconds*math.pi/30;


}


public void Drawclock (Graphics comp) {


graphics2d comp2d= (graphics2d) comp;


Comp2d.setcolor (Color.gray);


basicstroke pen=new Basicstroke (10f,basicstroke.cap_butt,basicstroke.join_round);


Comp2d.setstroke (pen);


arc2d.float circle=new arc2d.float (20f,20f,150f,150f,0f,360f,arc2d.open);


Comp2d.draw (circle);


Comp2d.setcolor (Color.White);


Comp2d.fill (circle);


pen=new Basicstroke (1f,basicstroke.cap_butt,basicstroke.join_round);


Comp2d.setstroke (pen);


Comp2d.setcolor (Color.cyan);


circle=new arc2d.float (20.5f,20.5f,149f,149f,0f,360f,arc2d.open);


Comp2d.draw (circle);


Comp2d.setcolor (Color.Black);


pen=new Basicstroke (8f,basicstroke.cap_butt,basicstroke.join_round);


Comp2d.setstroke (pen);


pin stake=new pin (95.0,95.0,75.0);


double stakeradian=0;


for (int i=0;i<12;i++) {


Comp2d.draw (Stake.createstake (Stakeradian));


STAKERADIAN+=MATH.PI/6;


}


pen=new Basicstroke (2f,basicstroke.cap_butt,basicstroke.join_round);


Comp2d.setstroke (pen);


Comp2d.setcolor (Color.cyan);


for (int i=0;i<12;i++) {


Comp2d.draw (Stake.createstake (Stakeradian));


STAKERADIAN+=MATH.PI/6;


}


Comp2d.setcolor (Color.dark_gray);


pin Secondpin =new pin (95.0,95.0,65.0);


pin Minutepin =new pin (95.0,95.0,50.0);


pin Hourpin =new pin (95.0,95.0,40.0);


pen =new basicstroke (2f,basicstroke.cap_butt,basicstroke.join_round);


basicstroke pen1=new Basicstroke (3f,basicstroke.cap_butt,basicstroke.join_round);


basicstroke pen2=new Basicstroke (4f,basicstroke.cap_butt,basicstroke.join_round);


Inittime ();


Comp2d.setstroke (pen);


Comp2d.draw (Secondpin.createpin (Secondradian));


Comp2d.setstroke (PEN1);


Comp2d.draw (Minutepin.createpin (Minuteradian));


Comp2d.setstroke (PEN2);


Comp2d.draw (Hourpin.createpin (Hourradian));


}


}


}


package com.zhou.clock;


import java.awt.*;


import java.awt.geom.*;


import javax.swing.*;


import Java.lang.Math;


public class pin{


double Constantx;


double constanty;


double length;


public Pin (double inputx, double inputy, double inputlength) {


Constantx=inputx;


constanty=inputy;


length =inputlength;


}


public line2d.double Createpin (Double radian) {


double Variablex;


double Variabley;


Variablex=constantx+length*math.sin (Radian);


Variabley=constanty-length*math.cos (Radian);


line2d.double ln=new line2d.double (Constantx,constanty,variablex,variabley);


return LN;


}


public line2d.double Createstake (Double radian) {


double Innerx;


double innery;


double Outerx;


double outery;


innerx=constantx+ (length-15) *math.sin (radian);


innery=constanty-(length-15) *math.cos (radian);


Outerx=constantx+length*math.sin (Radian);


Outery=constanty-length*math.cos (Radian);


line2d.double ln=new line2d.double (innerx,innery,outerx,outery);


return LN;


}


}