Java tutorial
package org.opencv.core; //javadoc:Point_ public class Point { public double x, y; public Point(double x, double y) { this.x = x; this.y = y; } public Point() { this(0, 0); } public Point(double[] vals) { this(); set(vals); } public void set(double[] vals) { if (vals != null) { x = vals.length > 0 ? vals[0] : 0; y = vals.length > 1 ? vals[1] : 0; } else { x = 0; y = 0; } } public Point clone() { return new Point(x, y); } public double dot(Point p) { return x * p.x + y * p.y; } @Override public int hashCode() { final int prime = 31; int result = 1; long temp; temp = Double.doubleToLongBits(x); result = prime * result + (int) (temp ^ (temp >>> 32)); temp = Double.doubleToLongBits(y); result = prime * result + (int) (temp ^ (temp >>> 32)); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (!(obj instanceof Point)) return false; Point it = (Point) obj; return x == it.x && y == it.y; } public boolean inside(Rect r) { return r.contains(this); } @Override public String toString() { return "{" + x + ", " + y + "}"; } }