Point2D.Double wrapper
I took a look and came up with a couple of suggestions:

Extend rather than wrap

I think it will be more useful if you extend the Point2D.Double class, instead of writing a wrapper around it. This way you will be able to use your custom point class everywhere that a normal Point2D.Double is expected. It also spares you from implementing and overriding many of the Double's methods like getX() and the hashCode() and toString() methods.

Use static method for construction from line

When subclassing Double it is not possible to have a constructor that takes a line, does some calculations and then calls super(), as super has to be the first call in the constructor. Therefor we need to add a static utility class to create a Point from a line. See the fromLine() method below. 

I think this is not a problem, as it leads to very readable line:

Point start = Point.fromLine(line);


Documentation

Your code does not include any documentation in form of comments, so that for example the input format for the fromLine() function is not entirely clear. Also it only uses one point from a line (which should be two points?), so maybe it should be called fromLineStart() or fromLineEnd() depending on which you mean.

Class Naming

The current name Point doesn't tell us a lot about what the class does. Maybe use something a little more descriptive like PointDouble2D? Maybe add some indication as that it does more than the normal Point2D.Double, by naming it: PointDouble2DAdvanced or something like that, not totally sure myself :)

Final Result

Here is the entire code example, without documentation comments:

import java.awt.geom.Point2D;

public class PointDouble2D extends Point2D.Double {

    public Point(double x, double y) {
        super(x, y);
    }

    public boolean dominates(Point2D.Double point) {
        return (getX() &lt;= point.getX() &amp;&amp; getY() &lt; point.getY())
                || (getY() &lt;= point.getY() &amp;&amp; getX() &lt; point.getX());
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append('(').append(getX()).append(", ").append(getY())
                .append(')');
        return builder.toString();
    }

    public static PointDouble2D fromLineStart(String line, String delimiter) {
        line = line.trim();
        String[] lineArray = line.split(delimiter);
        double x = java.lang.Double.parseDouble(lineArray[0]);
        double y = java.lang.Double.parseDouble(lineArray[1]);
        return new PointDouble2D(x, y);
    }
}


What do you think?