Hi! I'm starting with processing, and I've been trying to make a this game with processing...
But I just can't get past this problem.
When one of the objects of the class 'Bomb' generated by the array list bomb[] hits the other object of the class 'Target' generated by the array list target[] It is purposed to appen "something", but I just can't define that colison in sintax...
Can anybody help me!?!!?  :-/      


////////////////////////////////////
int alturadocursor= 50;            
int numBomb = 0;                    
Bomb []bomb = new Bomb[numBomb];
int numTarget =2;
Target []target = new Target[numTarget];


void setup () {
 size (350,300);  
 for(int i = 0; i<numTarget; i++) {
 target[i] = new Target(random(60, 140),random (180,220),5);
   
}
}

void draw(){  
 noCursor();
 smooth();
 background (255);
 mouse();
 for(int i = 0; i<bomb.length; i++) {
 bomb[i].display();
 bomb[i].movimento();  
 
}
 for(int i = 0; i<numTarget;i++) {
 target[i].displaymosca1();
 target[i].movemosca();
 }
}

void mousePressed(){
 Bomb b = new Bomb(mouseX,alturadocursor,1.2);
 bomb = (Bomb[]) append (bomb,b);  
 }
 
 void manage() {
   for(int i = 0; i<numTarget; i++) {
   target[i] = new Target(random(60, 140),random (180,220),5);
   }
   
   
}
   
void mouse(){
 strokeCap(ROUND);
 line(mouseX,46,mouseX+width/5,46);
 line(mouseX+width/5,46,mouseX+width/5,40);
 line(mouseX-width/5,46,mouseX-width/5,40);
 line(mouseX,46,mouseX-width/5,46);
 fill(#6C1510);
 beginShape();
 vertex(mouseX-5,46);
 vertex(mouseX-2,43);
 vertex(mouseX+2,43);
 vertex(mouseX+5,46);
 vertex(mouseX+5,52);
 vertex(mouseX-5,52);
 endShape(CLOSE);
 }

///////////////////////////////CLASS BOMB

class Bomb {
 float x,y;//pos x e y da bomba
 float g; //gravidade
 float c1,c2; //cor
 float t1,t2;// tamanho da bomba quer quando é menor ou igual a height;
 float bd = 50;
 
 Bomb(float xpos, float ypos, float gravidade) {
   x=xpos;
   y=ypos;
   g=gravidade;  
 }

void display() {
   
   t1=1;
   t2=random(0,bd);
   c1=0;
   c2=random(255);
   if(y<height){        
     fill(c1);
     ellipse(x,y,t1,t1);
   }
   else {              
     fill(c2);
     ellipse(x,y,t2,t2);
     bd=bd-0.5;
   }
 }  
void movimento() {
   y=y+g;
   if (y>=height) {
     y=height;
   }
 }
}

////////////////////CLASS TARGET

class Target {
 float a;    
 float b;    
 float tam;  
 float xoscilation = 0.1;
 float xoincrement =0.01;
 float a1;
 float a2;
 float w;
 float updw=0.5;
 float v;

 
 Target(float px, float py, float t){
   a=px;
   b=py;
   tam=t;  

 }
 void displaymosca1(){
   fill(0);
   ellipse(a,b,tam,tam);
   frameRate(600);
   w=random(b-5,b+5);
   line(a,b,a-7,w);
   line(a,b,a+7,w);  

 }

 void movemosca(){
   a = a + random(-3, 3);
   
   b = b + random(-1, 1);
 
 if (a<=0){
   a=0;
 }
 if (a>=width){
 a = width;  
 if (b<=60){
 b=60;
 }
 if (b>=height){
 b=height;
 }  
}
}
}