Need help with array lists

Im calculating x and y values and I need to put these into Array lists, what im doing wrong?
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class Arvutused {
static ArrayList listx = new ArrayList();
static ArrayList listy = new ArrayList();

public Arvutused() {

double x, y, t = 10.0, samm = 0.1;

while (t >= -10.0) {

t = t - samm;

x = xValue(t);

y = yValue(t);

listx.add(new Double(x));
listy.add(new Double(y));

* X values calculating.
* @return x v


  • you have put your code in Constructor and don't have a public static void main(String args[]) method so your program can not run until you get this method also to run the code from your constructor you need to create an object of your class using new() operator.

  • This post has been deleted.
  • This post has been deleted.
  • thanks, I figured it out.
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