Is there a way to truncate a big array without copying it to another one?
Cause I get (java.lang.OutOfMemoryError) when doing it.

I tried
Code:

int[] trimmedArray = new int[sp];
System.arraycopy(array, 0, trimmedArray, 0, sp);	  
return trimmedArray;
 

but get OutOfMemoryError.

I tried
Code:

array=subset(array, 0, sp);
return array;
 

but this does the same thing with the same result.

My original array fits in memory, so its annoying not to be able to truncate it.

You're probably right.
The ArrayList or Vector may help, since they both have a toArray() method.

http://java.sun.com/j2se/1.4.2/docs/api/java/util/List.html
http://java.sun.com/j2se/1.4.2/docs/api/java/util/Vector.html
http://www.javacoffeebreak.com/faq/faq0017.html

I'm a Processing/Java beginner so I'm not familiar with Collection, List, ...
but someday I will learn to use them.

I tried this code, Code:

void setup() {
  size(120,120);
  background(153);
  noLoop();
}//setup()

void draw() {
  // Create an instance of class Vector, with initial vector size
  System.out.println("--- input to Vector ---");
  Vector myVector = new Vector(10);
  for (int i=1; i<=3; i++) {
    myVector.addElement( new Integer(i));
    System.out.println(i);
  }
  // Traverse list, printing them all out
  System.out.println("--- output from Vector ---");
  for (Enumeration e = myVector.elements(); e.hasMoreElements();) {
    Integer num = (Integer) e.nextElement();
    System.out.println(num);
  }
  // convert to an array
  System.out.println("--- Vector to Array ---");
  System.out.println("myVector.size() = "+myVector.size());
  Integer[] myArray = new Integer[myVector.size()];
  myVector.toArray(myArray);
  // output array
  System.out.println("--- output from array ---");
  for (int i=0; i<myArray.length; i++) {
    System.out.println(myArray[i]);
  }
  // Traverse list, printing them all out
  System.out.println("--- output from Vector ---");
  for (Enumeration e = myVector.elements(); e.hasMoreElements();) {
    Integer num = (Integer) e.nextElement();
    System.out.println(num);
  }
}//draw()
 

It's working, but there are 2 problems for my needs:
-- converting the Vector to an array keeps the Vector, so my whole list is now duplicated in memory.
-- the array is an Integer array, it has to be duplicated again by copying it into an int array.
This doesn't work Code:

Integer aa=12;
int bb=(int) aa;
 

but this works Code:

// to int i from Integer ii
int i = ii.intValue();
// to Integer ii from int i
Integer ii = new Integer( i ); 

found at http://mindprod.com/jgloss/intvsinteger.html
The more I know, the more I think Java is badly designed from the start, making complex what used to be simple in Pascal or Basic.