Add a way to get the time a draw() or update() call took.

src/de/teamteamteam/spacescooter/GameFrame.java

@@ -31,6 +31,11 @@ public class GameFrame extends JFrame {
 	 */
 	private Screen superScreen;
 
+	/**
+	 * Time in nanoseconds the last draw() call took.
+	 */
+	private long frameTime;
+
 	/**
 	 * Default constructor.
 	 */
@@ -94,6 +99,7 @@ public class GameFrame extends JFrame {
 	 * @see http://docs.oracle.com/javase/7/docs/api/java/awt/image/BufferStrategy.html
 	 */
 	public void draw() {
+		long frameStart = System.nanoTime(); //Record time the draw call started.
 		Graphics2D bufferedGraphics = null;
 		do { // while bufferStrategy.contentsLost()
 			do { // bufferStrategy.contentsRestored()
@@ -113,6 +119,7 @@ public class GameFrame extends JFrame {
 			this.bufferStrategy.show(); //Show the drawn image
 		} while (this.bufferStrategy.contentsLost()); //Redraw in case the VolatileImage got lost
 		Toolkit.getDefaultToolkit().sync(); //Tell the OS to update its graphics of the window.
+		this.frameTime = System.nanoTime() - frameStart; //Update frameTime
 	}
 
 	/**
@@ -122,4 +129,11 @@ public class GameFrame extends JFrame {
 		bufferedGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 		bufferedGraphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 	}
+	
+	/**
+	 * Returns the time in nanoseconds the last draw() call took.
+	 */
+	public long getFrameTime() {
+		return this.frameTime;
+	}
 }

src/de/teamteamteam/spacescooter/screen/GameScreen.java

@@ -52,6 +52,7 @@ public class GameScreen extends Screen {
 		while (this.entityPaintIterator.hasNext()) {
 			this.entityPaintIterator.next().paint(g);
 		}
+		g.drawString("Frame Time: " + "", 20, 20);
 	}
 
 	@Override

src/de/teamteamteam/spacescooter/sound/SoundSystem.java

@@ -117,6 +117,8 @@ public class SoundSystem {
 					sourceDataLine.drain();
 					sourceDataLine.close();
 					sound.close();
+				} catch (javax.sound.sampled.LineUnavailableException lue) {
+					System.err.println("Could not play sound: " + fSoundURL);
 				} catch (Exception e) {
 					e.printStackTrace();
 				}

src/de/teamteamteam/spacescooter/thread/PaintThread.java

@@ -14,6 +14,11 @@ public class PaintThread extends TimedThread {
 	 */
 	private final Runnable paintRunnable;
 	
+	/**
+	 * Internal pointer to GameFrame.
+	 */
+	private final GameFrame gameFrame;
+	
 	/**
 	 * Constructor. Sets the name of the Thread and creates the paintRunnable.
 	 */
@@ -25,6 +30,7 @@ public class PaintThread extends TimedThread {
 				gameFrame.draw();
 			}
 		};
+		this.gameFrame = gf;
 	}
 
 	/**
@@ -34,4 +40,13 @@ public class PaintThread extends TimedThread {
 		//Trigger redrawing the things. Important: AWT-Context needed here!
 		EventQueue.invokeLater(this.paintRunnable);
 	}
+
+	/**
+	 * Return the workTime by asking the GameFrame for the time the
+	 * draw() call took in nanoseconds.
+	 */
+	@Override
+	public long getWorkTime() {
+		return this.gameFrame.getFrameTime();
+	}
 }

src/de/teamteamteam/spacescooter/thread/TimedThread.java

@@ -7,8 +7,17 @@ package de.teamteamteam.spacescooter.thread;
  */
 public abstract class TimedThread extends Thread {
 
+	/**
+	 * Internal interval in which to trigger work().
+	 * Calculated based on setHz()
+	 */
 	private long workInterval;
 
+	/**
+	 * Internal value representing runtime of the last work() call.
+	 */
+	private long workTime;
+	
 	/**
 	 * This method sets the actual working interval based on hz.
 	 * 
@@ -28,7 +37,7 @@ public abstract class TimedThread extends Thread {
 			this.work();
 			long workDone = System.nanoTime();
 			//calculate time of work
-			long workTime = (workDone - workStart);
+			this.workTime = (workDone - workStart);
 
 			long timeToWait = this.workInterval - workTime;
 			long msToWait = timeToWait / 1000000;
@@ -60,4 +69,12 @@ public abstract class TimedThread extends Thread {
 	 */
 	public abstract void work();
 	
+	/**
+	 * Returns current value of workTime.
+	 * Tells how many nanoseconds the last work() call needed to complete.
+	 */
+	public long getWorkTime() {
+		return this.workTime;
+	}
+
 }