Membuat class timer pada java

Modul Praktikum Timer
1. Tujuan
• Memahami dan menggunakan class Timer dan TimerTask
• Mengolah waktu dengan Timer dan TimerTask
• Menentukan waktu yang sesuai untuk penjadwalan
• Dapat membuat animasi dari Timer dan TimerTask
2. LatarBelakang
Class Timer merupakan salah satu pengembangan dari versi Java 1.3, dalam lingkup J2SE berupa pembentukan class-class yang mempermudah pengaturan penjadwalan proses agar dapat dieksekusi melalui pengaksesan fungsi dasar thread. Pembaharuan diatas juga dapat dimanfaatkan oleh pengembang pemrograman berbasis mobile (J2ME) karena class baru diatas juga telah menjadi bagian dalam MIDP (Mobile Information Device Profile).
3. Percobaan
Percobaan 1: Membuat Class MidletSplashTimer
import java.util.Timer;
import java.util.TimerTask;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class MidletSplashTimer extends MIDlet {
private SplashTimerCanvas ttCanvas;
private Display display;
private Timer timer;
private TimerTask timerTask;
public MidletSplashTimer() { }
protected void startApp() {
display = Display.getDisplay(this);
ttCanvas = new SplashTimerCanvas(this);
display.setCurrent(ttCanvas);
}
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
protected void pauseApp() { }
protected void destroyApp(boolean unconditional) { }
void stopTimer() {
timer.cancel();
timerTask.cancel();
}
void startTimer() {
timer = new Timer();
timerTask = new TimerTask() {
public void run() {
display.setCurrent(new SuccesCanvas());
}
};
timer.schedule(timerTask, 3000);
}
}
Percobaan 2 : Membuat Class SplashTimerCanvas
import javax.microedition.lcdui.*;
public class SplashTimerCanvas extends Canvas {
private MidletSplashTimer midletTT;
int w, h, hImg;
private Image img;
public SplashTimerCanvas(MidletSplashTimer midlet) {
w = getWidth();
h = getHeight();
midletTT = midlet;
try {
img = Image.createImage("/jeni.png");
} catch (java.io.IOException e) { }
hImg = img.getHeight();
}
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
protected void paint(Graphics g) {
g.setColor(255, 255, 255);
g.fillRect(0, 0, w, h);
g.drawImage(img, w/2, h/2, Graphics.HCENTER | Graphics.VCENTER);
}
protected void hideNotify() {
midletTT.stopTimer();
}
protected void showNotify() {
midletTT.startTimer();
}
}
class SuccesCanvas extends Canvas {
protected void paint(Graphics g) {
g.setColor(255, 255, 255);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(255, 0, 0);
g.drawString("BERHASIL", getWidth()/2, (getHeight()/2)-10, Graphics.TOP
| Graphics.HCENTER);
g.drawString("Silakan Masuk", getWidth()/2, (getHeight()/2)+10,
Graphics.TOP | Graphics.HCENTER);
}
}
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
Hasil :
Percobaan 3 : Membuat Class MidletCounterDown
import java.util.Timer;
import java.util.TimerTask;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class MidletCounterDown extends MIDlet {
private CounterDownCanvas ttCanvas;
private Display display;
private int count;
private Timer timer;
private TimerTask timerTask;
public MidletCounterDown() {
count = 0;
}
protected void startApp() {
display = Display.getDisplay(this);
ttCanvas = new CounterDownCanvas(this);
display.setCurrent(ttCanvas);
}
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
protected void pauseApp() { }
protected void destroyApp(boolean unconditional) { }
private void timerRun() {
ate();
vas.w/2, ttCanvas.h/2 + ttCanvas.hImg/2, 20,
void stopTimer() {
);
SuccesCanvas());
void startTimer() {
;
ask() {
edule(timerTask, 1000, 1000);
count++;
ttCanvas.upd
ttCanvas.repaint(ttCan
20);
}
timer.cancel();
timerTask.cancel(
display.setCurrent(new
}
timer = new Timer()
timerTask = new TimerT
public void run() {
timerRun();
}
};
timer.sch
}
}
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
Percobaan 4 : Membuat Class CounterDownCanvas
import javax.microedition.lcdui.*;
public class CounterDownCanvas extends Canvas {
private MidletCounterDown midletTT;
int points;
int w, h, hImg;
private Image img;
public CounterDownCanvas(MidletCounterDown midlet) {
points = 3;
w = getWidth();
h = getHeight();
midletTT = midlet;
try {
img = Image.createImage("/jeni.png");
} catch (java.io.IOException e) { }
hImg = img.getHeight();
}
protected void paint(Graphics g) {
g.setColor(255, 255, 255);
g.fillRect(0, 0, w, h);
g.drawImage(img, w/2, h/2, Graphics.HCENTER | Graphics.VCENTER);
g.setColor(0, 0, 255);
g.drawString(""+ points, w/2, h/2 + hImg/2, Graphics.TOP |
Graphics.LEFT);
}
protected void hideNotify() {
midletTT.stopTimer();
}
protected void showNotify() {
midletTT.startTimer();
}
protected void update() {
points--;
if(points < 1) {
Versi 1.0 Distributed By Meruvian Education
Modul Praktikum Timer
hideNotify();
}
}
}
class SuccesCanvas extends Canvas {
protected void paint(Graphics g) {
g.setColor(255, 255, 255);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(255, 0, 0);
g.drawString("BERHASIL", getWidth()/2, (getHeight()/2)-10,
Graphics.TOP | Graphics.HCENTER);
g.drawString("Silakan Masuk", getWidth()/2, (getHeight()/2)+10,
Graphics.TOP | Graphics.HCENTER);
}
}
Hasil :