ph-math/src/main/java/com/helger/numbercruncher/mathutils/NewtonsRootFinder.java
@Override
  protected void checkPosition () throws AbstractRootFinder.PositionUnchangedException
  {
    if (EqualsHelper.equals (m_fXnp1, m_fPrevXnp1))
    {
      throw new AbstractRootFinder.PositionUnchangedException ();
    }
  }
@Override
  protected void checkPosition () throws AbstractRootFinder.PositionUnchangedException
  {
    if (EqualsHelper.equals (m_fXnp1, m_fPrevXnp1))
    {
      throw new AbstractRootFinder.PositionUnchangedException ();
    }
  }
@ Override protected void checkPosition ( ) throws AbstractRootFinder . PositionUnchangedException { if ( EqualsHelper . equals ( m_fXnp1 , m_fPrevXnp1 ) ) { throw new AbstractRootFinder . PositionUnchangedException ( ) ; } }
Check the position of x[n+1].

@throws PositionUnchangedException
Check the position of x [ n + 1 ] .