kleine verschönerungen

src/aufgabe8_grafik2d/Start.java

     JFrame frm = new JFrame();
     frm.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
     Container c = frm.getContentPane();
-    
     c.setLayout(new OverlayLayout(c));
     for (int zeigerLaenge = 1; zeigerLaenge <=3; zeigerLaenge++)
     {

src/aufgabe8_grafik2d/Zeiger.java

 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
+import java.util.logging.Logger;
 import javax.swing.JComponent;
 
 /**
  */
 public class Zeiger extends JComponent implements Runnable
 {
+  private Logger lg = Logger.getLogger("grafik");
   private static final float DICKE = 4f;
   private Line2D.Float linie;
   private BasicStroke stift;
-  private volatile float radius;
+  private volatile double radius;
   private volatile float xMitte;
   private volatile float yMitte;
   private volatile double xAussen;
     {
       synchronized(this)
       {
-        alpha += 0.1;
+        alpha += 0.08;
         xAussen = xMitte +cos(2*PI*alpha) * radius;
         yAussen = yMitte + sin(2*PI*alpha) * radius;
       }
       }
       catch (Exception ex)
       {
-        //lg.severe(ex.toString());
+        lg.severe(ex.toString());
       }
     }
   }
     super.paintComponent(g);
     Graphics2D g2 = (Graphics2D)g;
     
-    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
-                        RenderingHints.VALUE_ANTIALIAS_ON);
+    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
     
     float breite = this.getWidth() - 1;
     float hoehe = this.getHeight() - 1;
  
-
-    float radius = (min(hoehe, breite)/2 - 50) * 1/ zeigerlaenge;
+    radius = (min(hoehe, breite)/2 *0.9) * 1/ zeigerlaenge;
     
     xMitte = breite/2;
     yMitte = hoehe/2;
-    xAussen = xMitte +cos(2*PI*alpha) * radius;
-    yAussen = yMitte + sin(2*PI*alpha) * radius;
+    
+    synchronized(this)
+    {
+      xAussen = xMitte +cos(2*PI*alpha) * radius;
+      yAussen = yMitte + sin(2*PI*alpha) * radius;
+    }
     
     linie.setLine(xMitte, yMitte, xAussen, yAussen);