Membuat Jam Digital dengan NetBeans
Sebelum menggunakan NetBeans, jangan lupa terlebih dahulu instal JDK (Java Development Kit).
bisa didownload di http://java.sun.com/javase/downloads/index.jsp.
//---------------------script---------------------//
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package jam_digital;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.util.Date;
import javax.swing.JFrame;
import javax.swing.JPanel;
/**
*
* @author Champerz
*/
public class JamDigital extends JPanel {
//Deklarasi Variable
JFrame frame;
int currentHour;
int currentMinute;
int currentSecond;
//Set Font
Font myFont = new Font("Painter", Font.BOLD, 30);
//Set Color
Color myColor = new Color(0, 10, 255);
//Save Font Information.
FontMetrics fm;
public JamDigital() {
//Create a window using JFrame with title ( Java Digital Clock )
frame = new JFrame("Digital Clock");
//add(this) mean add created panel into JFrame
//Which panel ?
//See line 98 and 20 (I hope you understand it)
frame.add(this);
//Set default close operation for JFrame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Set Frame size
frame.setSize(220, 75);
//Make JFrame locate at center
frame.setLocationRelativeTo(null);
//Make JFrame visible
frame.setVisible(true);
frame.setResizable(false);
// frame.setBounds(450, 300, 0, 0);
// frame.setUndecorated(false);
/*
*Loop that will make sure panel show current time
*like current second, current minute and current hour.
*/
while (true) {
//It will do all code in method paint(See line 71)
repaint();
try {
Thread.sleep(900);
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
@Override
public void paint(Graphics g) {
super.paint(g);
/*
*Create current Date object. It means it store information
*about current hour, minute and second.
*/
Date myDate = new Date();
currentHour = myDate.getHours();
currentMinute = myDate.getMinutes();
currentSecond = myDate.getSeconds();
//Set font that will use to draw digital number
g.setFont(myFont);
//Information about distance between number in digital clock
fm = g.getFontMetrics();
int hourXCoordinate = 20;
int minuteXCoordinate = hourXCoordinate + (fm.getMaxAdvance() * 2);
int secondXCoordinate = hourXCoordinate + (fm.getMaxAdvance() * 4);
//Set color that will use to draw digital number
g.setColor(myColor);
//Draw hour, draw (:) between number, draw minute and draw second.
g.drawString(Integer.toString(currentHour), hourXCoordinate, 30);
g.drawString(":", (hourXCoordinate + minuteXCoordinate) / 2, 30);
g.drawString(Integer.toString(currentMinute), minuteXCoordinate, 30);
g.drawString(":", (secondXCoordinate + minuteXCoordinate) / 2, 30);
g.drawString(Integer.toString(currentSecond), secondXCoordinate, 30);
}
public static void main(String[] args) {
JamDigital sdc = new JamDigital();
}
}
//---------------------script---------------------//
Hasil dari script diatas.
Download NetBeans di http://netbeans.org/downloads/index.html.
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