Clearing an ArrayList within a method

I have 3 ArrayLists that I need to be able to clear between loops. They store a few values for my method to use in calculations, but I need the ArrayLists that store them empty again so that I can put new values in and the method only consider the new values. I have tried the ArrayList.clear() but it makes the method
return this:Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0. I tried to check them against the original list with the removeAll method, but it didn't work either. Help is appreciated.

public static double getZMM(double[][] A, ArrayList<Double> b, ArrayList<Double> c, ArrayList<Double> d){
				
				
				int e = 0;
				double volume = 0;
				double xmax = 0;
				double xmin = 0;
				double ymax = 0;
				double ymin = 0;
				double zmax = 0;
				double zmin = 0;
				double total = 0;
				double stepSize = 2;
				
				
				double[][] a =  A;
				ArrayList<Double> x = new ArrayList();
				ArrayList<Double> y = new ArrayList();
				ArrayList<Double> z = new ArrayList();
				
				while( e < a.length - 1){
				for(int i = 0; i < a.length - 1; i++){
					if(a[i][2] < stepSize & a[i][2] > stepSize - 2){
					x.add(a[i][0]); // I need to clear these
					y.add(a[i][1]);//
					z.add(a[i][2]);//
					}
				}
				
				xmax = x.get(0);
				for (int r = 1; r < x.size(); r++){
					if (x.get(r) > xmax) xmax = z.get(r);
				}
				
				xmin = x.get(0);
				for (int w = 1; w < x.size(); w++){
					if (x.get(w) < xmin) xmin = x.get(w);
				}
				
				ymax = y.get(0);
				for (int s = 1; s < y.size(); s++){
					if (y.get(s) > ymax) ymax = y.get(s);
				}
				
				ymin = y.get(0);
				for (int v = 1; v < y.size(); v++){
					if (y.get(v) < ymin) ymin = y.get(v);
				}
				
				zmax = z.get(0);
				for (int h = 1; h < z.size(); h++){
					if (z.get(h) > zmax) zmax = z.get(h);
				}
					
				 zmin = z.get(0);
				for (int j = 1; j < z.size(); j++){
					if (z.get(j) < zmin) zmin = z.get(j);
				}
				 
				double zDistance = eq(zmax,zmin,ymax,ymin,xmax,xmin);
				
				total = ( Math.PI * (Math.pow(((xmax+ymax)/2),2) * zDistance));
				 volume = total+=total;
				
				 e++;
				stepSize+=stepSize;
				}
				
				return volume;
				
			}