public class Main {
static int entries = 100000000;
static byte[] barr = new byte[entries];

static {
System.err.println(Runtime.getRuntime().totalMemory());
for (int i = 0; i < entries; i++) {
barr[i] = new Byte("1");
}
System.err.println(barr.length);
System.err.println(Runtime.getRuntime().totalMemory());
}

public static void main(String[] args) {

}
}

public final static int X = 0;
public final static int Y = 1;
public final static int z = 2;
public final static int IMAGE_INDEX = 3;
public final static int SPRITE_SIZE = 4;

So that you can do draw(sprites[index + X],sprites[index + Y],sprites[index + IMAGE_INDEX])

However, Javac is very bad compiler and actually generates code index + 0 (rather than saying +0 is not actually much use and removing it).

So I removed that code, and some other optimizations and one of them I did was to replace code like
static final byte B[] = {10, 20, 30, 40, 50, 60, 70, 80, …};

with static final byte B[] = Bytecode::ArrayFromString(“encodedString”,offset), the encoded string was generated via the optimizer and occurred once in the class pool and had simple run length encoding as well (the other option would have been to load the data from a resource, but the string encoding was the simplest since I didn’t need to worry about it not being available).