update of Nature of Code examples, need to do one more before 2.0

java/examples/Books/Nature of Code/chp4_systems/ParticleSystemInheritance_pushpop/ParticleSystem.pde

@@ -15,18 +15,18 @@ class ParticleSystem {
     float r = random(1);
     if (r < 0.5) { 
       particles.add(new Particle(origin));
-    } else {
+    } 
+    else {
       particles.add(new ParticleChild(origin));
     }
   }
 
   void run() {
-    Iterator<Particle> it = particles.iterator();
-    while (it.hasNext()) {
-      Particle p = it.next();
+    for (int i = particles.size()-1; i >= 0; i--) {
+      Particle p = particles.get(i);
       p.run();
       if (p.isDead()) {
-        it.remove();
+        particles.remove(i);
       }
     }
   }
@@ -34,4 +34,3 @@ class ParticleSystem {
 
 
 
-

java/examples/Books/Nature of Code/chp4_systems/ParticleSystemInheritance_pushpop/ParticleSystemInheritance_pushpop.pde

@@ -5,7 +5,7 @@
 ParticleSystem ps;
 
 void setup() {
-  size(200,200);
+  size(640,360);
   ps = new ParticleSystem(new PVector(width/2,50));
 }