I just found a post in the gwt contributors group but I cannot find it anywhere in gwt, any ideas? http://groups.google.com/group/google-web-toolkit-contributors/browse_thread/thread/a5193c6a82eddb5e/b400204dddcc8c64
On Mar 31, 2:20 pm, googelybear <[email protected]> wrote: > Hi, > > this question might seem stupid but how can one implement hashCode() > and equals() for a simple 2d point class as follows: > > public class Point { > > private double fX; > > private double fY; > > public double getX() { > return fX; > } > > public void setX(double x) { > this.fX= x; > } > > public double getY() { > return fY; > } > > public void setY(double y) { > this.fY= y; > } > > } > > The generated equals() and hashCode() methods from Eclipse do NOT work > with GWT as method Double.doubleToLongBits() is missing: > > @Override > public int hashCode() { > final int prime= 31; > int result= 1; > long temp; > temp= Double.doubleToLongBits(fX); > result= prime * result + (int) (temp ^ (temp >>> 32)); > temp= Double.doubleToLongBits(fY); > result= prime * result + (int) (temp ^ (temp >>> 32)); > return result; > } > > @Override > public boolean equals(Object obj) { > if (this == obj) > return true; > if (obj == null) > return false; > if (!(obj instanceof Point)) > return false; > Point other= (Point) obj; > if (Double.doubleToLongBits(fX) != > Double.doubleToLongBits(other.fX)) > return false; > if (Double.doubleToLongBits(fY) != > Double.doubleToLongBits(other.fY)) > return false; > return true; > } > > Does anyone have an idea how to implement this? > > thanks a bunch, > > Dennis -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
