public ZipfDistr(double shape,int population){
  if (shape <= 0.0) {
    throw new IllegalArgumentException("Mean must be greated than 0.0 and population greater than 0");
  }
  numGen=new Random(System.currentTimeMillis());
  this.shape=shape;
  computeDen(shape,population);
}

public ZipfDistr ( double shape , int population ) { if ( shape <= 0.0 ) { throw new IllegalArgumentException ( "Mean must be greated than 0.0 and population greater than 0" ) ; } numGen = new Random ( System . currentTimeMillis ( ) ) ; this . shape = shape ; computeDen ( shape , population ) ; }
instantiates a new zipf pseudo random number generator .
