Question

Java question.

I am creating a clock program in Java GUI, but it has some problem.

First, The time of the clock is not correct. It has to point at the current time.

Second, the position of the clock character is wrong.

Please fix it for me please.

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import

java.util.Date;

import javax.swing.JPanel;

import javax.swing.WindowConstants;

public class Clock extends javax.swing.JFrame {

public int hour;

public int min;

public int sec;

ClockDial cd;

public Clock() {

setSize(510, 530);

setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

cd = new ClockDial(this);

getContentPane().add(cd);

Date curr = new Date();

String time = curr.toString();

hour = Integer.parseInt(time.substring(11, 13));

min = Integer.parseInt(time.substring(14, 16));

sec = Integer.parseInt(time.substring(17, 19));

ClockEngine.setPriority(ClockEngine.getPriority() + 3);

ClockEngine.start();

}

public static void main(String args[]) {

new Clock().setVisible(true);

}

Thread ClockEngine = new Thread()

{

int newsec, newmin;

public void run() {

while(true) {

newsec = (sec + 1) % 60;

newmin = (min + (sec + 1) / 60) / 60;

hour = (hour + (min + (sec + 1) / 60) % 60) % 12;

sec = newsec;

min = newmin;

try {

Thread.sleep(1000);

} catch(InterruptedException ex) {}

cd.repaint();

}

}

};

}

class ClockDial extends JPanel{

Clock parent;

public ClockDial(Clock pt) {

setSize(520, 530);

parent = pt;

}

@Override

public void paintComponent(Graphics g) {

g.setColor(Color.BLACK);

g.fillRect(0, 0, getWidth(), getHeight());

g.setColor(Color.WHITE);

g.fillOval(5, 5, 480, 480);

g.setColor(Color.BLACK);

g.fillOval(10, 10, 470, 470);

g.setColor(Color.WHITE);

g.fillOval(237, 237, 15, 15);

g.setFont(g.getFont().deriveFont(Font.BOLD, 32));

for(int i = 1; i <= 12; i++)

g.drawString(Integer.toString(i), 240-(i/12)*11+(int)(210*Math.sin(i*Math.PI/6)),253-(int)(210*Math.cos(i)));

double minsecdeg = (double)Math.PI/30;

double hrdeg=(double)Math.PI/6;

int tx, ty;

int xpoints[] = new int[3];

int ypoints[] = new int[3];

tx = 245 + (int)(210*Math.sin(parent.sec*minsecdeg));

ty = 245 - (int)(210*Math.cos(parent.sec*minsecdeg));

g.drawLine(245, 245, tx, ty);

tx = 245 + (int)(190*Math.sin(parent.min*minsecdeg));

ty = 245 - (int)(190*Math.cos(parent.min*minsecdeg));

xpoints[0]=245;

xpoints[1]=tx+2;

xpoints[2]=tx-2;

ypoints[0]=245;

ypoints[1]=ty+2;

ypoints[2]=ty+2;

g.fillPolygon(xpoints, ypoints, 3);;

tx = 245 + (int)(160*Math.sin(parent.hour*hrdeg+parent.min*Math.PI/360));

ty = 245 + (int)(160*Math.cos(parent.hour*hrdeg+parent.min*Math.PI/360));

xpoints[1]=tx+4;

xpoints[2]=tx-4;

ypoints[1]=ty+4;

ypoints[2]=ty+4;

g.fillPolygon(xpoints, ypoints, 3);

}

}

Answer 1

Please let me know if you have any doubts or you want me to modify the answer. And if you find this answer useful then don't forget to rate my answer as thumps up. Thank you! :)

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.util.Date;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class Clock extends javax.swing.JFrame {

    public int hour;
    public int min;
    public int sec;
    ClockDial cd;

    public Clock() {
        setSize(510,530);
        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        cd=new ClockDial(this);
        getContentPane().add(cd);
        Date curr=new Date();
        String time=curr.toString();
        hour=Integer.parseInt(time.substring(11,13));
        min=Integer.parseInt(time.substring(14,16));
        sec=Integer.parseInt(time.substring(17,19));
        ClockEngine.setPriority(ClockEngine.getPriority()+3);
        ClockEngine.start();
    }

    public static void main(String args[]) {
        new Clock().setVisible(true);
    }

    Thread ClockEngine=new Thread()

    {
        int newsec,newmin;

        public void run()
        {
            while(true)
            {
                newsec=(sec+1)%60;
                newmin=(min+(sec+1)/60)%60;
                hour=(hour+(min+(sec+1)/60)/60)%12;
                sec=newsec;
                min=newmin;

                try {

                    Thread.sleep(1000);

                } catch (InterruptedException ex) {}

                cd.repaint();
            }
        }
    };
}

class ClockDial extends JPanel{

    Clock parent;
    public ClockDial(Clock pt){
        setSize(520,530);
        parent=pt;
    }

    @Override
    public void paintComponent(Graphics g) {
        g.setColor(Color.BLACK);
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(Color.WHITE);
        g.fillOval(5, 5,480,480);
        g.setColor(Color.BLACK);
        g.fillOval(10, 10,470,470);
        g.setColor(Color.WHITE);
        g.fillOval(237,237,15,15);
        g.setFont(g.getFont().deriveFont(Font.BOLD,32));

        for(int i=1;i<=12;i++)
            g.drawString(Integer.toString(i),240-(i/12)*11+(int)(210*Math.sin(i*Math.PI/6)),253-(int)(210*Math.cos(i*Math.PI/6)));

        double minsecdeg=(double)Math.PI/30;
        double hrdeg=(double)Math.PI/6;
        int tx,ty;
        int xpoints[]=new int[3];
        int ypoints[]=new int[3];

        //second hand
        tx=245+(int)(210*Math.sin(parent.sec*minsecdeg));
        ty=245-(int)(210*Math.cos(parent.sec*minsecdeg));
        g.drawLine(245,245,tx,ty);

        //minute hand
        tx=245+(int)(190*Math.sin(parent.min*minsecdeg));
        ty=245-(int)(190*Math.cos(parent.min*minsecdeg));
        xpoints[0]=245;
        xpoints[1]=tx+2;
        xpoints[2]=tx-2;
        ypoints[0]=245;
        ypoints[1]=ty+2;
        ypoints[2]=ty-2;
        g.fillPolygon(xpoints, ypoints,3);

        //hour hand
        tx=245+(int)(160*Math.sin(parent.hour*hrdeg+parent.min*Math.PI/360));
        ty=245-(int)(160*Math.cos(parent.hour*hrdeg+parent.min*Math.PI/360));
        xpoints[1]=tx+4;
        xpoints[2]=tx-4;
        ypoints[1]=ty-4;
        ypoints[2]=ty+4;
        g.fillPolygon(xpoints, ypoints, 3);

    }

}

Project ▼ 75 76 -idea 12 out 78 ▶ G Clock.java ClockGUL.iml 1111 External Libraries 10 Scratches and Consoles h.51n(İsHath . P1/6)), y: 253-(int) (210aMath.cos(1>Math. P1/6)));- 9 92 93 95 8 4 100 101 103 6 Run: Main /Library/Java/JavaVirtua LMachines/jdk-9.8.4.jdk/Conter ontents/lib/idea_rt.jar-61433:/Applications/IntelliJ IDEA 2819 Event Log Terminal 0: Messages . 4: Run TOO。 Build completed successfully in 19 s 327 ms (moments ago 96:58 LF UTF-8 4 spaces