Collatz in Java

Collatz.java

public class Collatz {

  public static void main(String [] argv) {
    int x = 100;
    int z = 0;
    
    while (x != 1) {
      if (x % 2 == 0) {
        x = x / 2;
      }
      else {
        x = x * 3 + 1;
      }
      z++;
    }
    
    System.console().writer().println(z);
  }
}