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Another update from ingydotnet^djgoku

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Ingy döt Net 2015-11-18 06:14:39 +00:00
parent 91df62d461
commit 948b86eafa
7604 changed files with 108452 additions and 22726 deletions
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72
Task/Draw-a-clock/Java/draw-a-clock.java
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@ -1,29 +1,27 @@
import java.awt.*;
import java.awt.event.*;
import java.util.Calendar;
import static java.lang.Math.*;
import java.time.LocalTime;
import javax.swing.*;
class Clock extends JPanel {
final float degrees06 = (float) Math.toRadians(6);
final float degrees06 = (float) (PI / 30);
final float degrees30 = degrees06 * 5;
final float degrees90 = degrees30 * 3;
final int size = 550;
final int spacing = 20;
final int size = 590;
final int spacing = 40;
final int diameter = size - 2 * spacing;
final int x = diameter / 2 + spacing;
final int y = diameter / 2 + spacing;
final int cx = diameter / 2 + spacing;
final int cy = diameter / 2 + spacing;
public Clock() {
setPreferredSize(new Dimension(size, size));
setBackground(Color.white);
new Timer(1000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
repaint();
}
new Timer(1000, (ActionEvent e) -> {
repaint();
}).start();
}
@ -34,46 +32,50 @@ class Clock extends JPanel {
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(Color.black);
g.drawOval(spacing, spacing, diameter, diameter);
drawFace(g);
Calendar date = Calendar.getInstance();
int hours = date.get(Calendar.HOUR);
int minutes = date.get(Calendar.MINUTE);
int seconds = date.get(Calendar.SECOND);
final LocalTime time = LocalTime.now();
int hour = time.getHour();
int minute = time.getMinute();
int second = time.getSecond();
float angle = degrees90 - (degrees06 * seconds);
float angle = degrees90 - (degrees06 * second);
drawHand(g, angle, diameter / 2 - 30, Color.red);
float minsecs = (minutes + seconds / 60.0F);
float minsecs = (minute + second / 60.0F);
angle = degrees90 - (degrees06 * minsecs);
drawHand(g, angle, diameter / 3 + 10, Color.black);
float hourmins = (hours + minsecs / 60.0F);
float hourmins = (hour + minsecs / 60.0F);
angle = degrees90 - (degrees30 * hourmins);
drawHand(g, angle, diameter / 4 + 10, Color.black);
}
private void drawFace(Graphics2D g) {
g.setStroke(new BasicStroke(2));
g.setColor(Color.white);
g.fillOval(spacing, spacing, diameter, diameter);
g.setColor(Color.black);
g.drawOval(spacing, spacing, diameter, diameter);
}
private void drawHand(Graphics2D g, float angle, int radius, Color color) {
int x2 = x + (int) (radius * Math.cos(angle));
int y2 = y + (int) (radius * Math.sin(-angle)); // flip y-axis
int x = cx + (int) (radius * cos(angle));
int y = cy - (int) (radius * sin(angle));
g.setColor(color);
g.drawLine(x, y, x2, y2);
g.drawLine(cx, cy, x, y);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setTitle("Clock");
f.setResizable(false);
f.add(new Clock(), BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
SwingUtilities.invokeLater(() -> {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setTitle("Clock");
f.setResizable(false);
f.add(new Clock(), BorderLayout.CENTER);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
});
}
}