Make Analog Clock in Java

July 15, 2023

Make Analog Clock in Java

Make Analog Clock in Java:

________________________________________________ How to Make Analog Clock in Java?

package SimpleProjects;

import java.awt.*;
import java.awt.event.*;
import static java.lang.Math.*;
import java.time.LocalTime;
import javax.swing.*;

public class AnalogClock extends JPanel{
	
	final float degrees06 = (float) (PI / 30);
	final float degrees30 = degrees06 * 5;
	final float degrees90 = degrees30 * 3;
	
	final int size = 300;
	final int spacing = 10;
	final int diameter = size - 2 * spacing;
	final int cX = diameter / 2 + spacing;
	final int cY = diameter / 2 + spacing;
	
	public AnalogClock() {
		setPreferredSize(new Dimension(size, size));
		setBackground(Color.CYAN);
		
		new Timer(1000, (ActionEvent e) ->{
			repaint();
		}).start();
	}
	
	@Override
	public void paintComponent(Graphics g2Dg) {
		super.paintComponent(g2Dg);
		Graphics2D g2D = (Graphics2D) g2Dg;
		g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
		
		drawFace(g2D);
		
		final LocalTime time = LocalTime.now();
		int hour = time.getHour();
		int minute = time.getMinute();
		int second = time.getSecond();
		
		float angle = degrees90 - (degrees06 * second);
		drawHand(g2D, angle, diameter / 2 - 30, Color.red);
		
		float minsecs = (minute + second / 60.0F);
		angle = degrees90 - (degrees06 * minsecs);
		drawHand(g2D, angle, diameter / 3 + 10, Color.black);
		
		float hourmin = (hour + minsecs / 60.0F);
		angle = degrees90 - (degrees30 * hourmin);
		drawHand(g2D, angle, diameter / 4 + 10, Color.black);
	}
	private void drawHand(Graphics2D g2d, float angle, int radius, Color color) {
		int x = cX + (int)(radius * cos(angle));
		int y = cY - (int)(radius * sin(angle));
		g2d.setColor(color);
		g2d.drawLine(cX, cY, x, y);
	}

	private void drawFace(Graphics2D g2d) {
		g2d.setStroke(new BasicStroke(2));
		g2d.setColor(Color.white);
		g2d.fillOval(spacing, spacing, diameter, diameter);
		g2d.setColor(Color.black);
		g2d.drawOval(spacing, spacing, diameter, diameter);
		
		
	}

	public static void main(String[] args) {
		SwingUtilities.invokeLater(() ->{
			JFrame frame = new JFrame();
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
			frame.setTitle("Analog Clock");
			frame.setResizable(false);
			frame.add(new AnalogClock(), BorderLayout.CENTER);
			frame.pack();
			frame.setLocationRelativeTo(null);
			frame.setVisible(true);
		});
		
	}

}