Java tutorial
package org.opencv.core; //javadoc:Rect_ public class Rect { public int x, y, width, height; public Rect(int x, int y, int width, int height) { this.x = x; this.y = y; this.width = width; this.height = height; } public Rect() { this(0, 0, 0, 0); } public Rect(Point p1, Point p2) { x = (int) (p1.x < p2.x ? p1.x : p2.x); y = (int) (p1.y < p2.y ? p1.y : p2.y); width = (int) (p1.x > p2.x ? p1.x : p2.x) - x; height = (int) (p1.y > p2.y ? p1.y : p2.y) - y; } public Rect(Point p, Size s) { this((int) p.x, (int) p.y, (int) s.width, (int) s.height); } public Rect(double[] vals) { set(vals); } public void set(double[] vals) { if (vals != null) { x = vals.length > 0 ? (int) vals[0] : 0; y = vals.length > 1 ? (int) vals[1] : 0; width = vals.length > 2 ? (int) vals[2] : 0; height = vals.length > 3 ? (int) vals[3] : 0; } else { x = 0; y = 0; width = 0; height = 0; } } public Rect clone() { return new Rect(x, y, width, height); } public Point tl() { return new Point(x, y); } public Point br() { return new Point(x + width, y + height); } public Size size() { return new Size(width, height); } public double area() { return width * height; } public boolean empty() { return width <= 0 || height <= 0; } public boolean contains(Point p) { return x <= p.x && p.x < x + width && y <= p.y && p.y < y + height; } @Override public int hashCode() { final int prime = 31; int result = 1; long temp; temp = Double.doubleToLongBits(height); result = prime * result + (int) (temp ^ (temp >>> 32)); temp = Double.doubleToLongBits(width); result = prime * result + (int) (temp ^ (temp >>> 32)); 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 Rect)) return false; Rect it = (Rect) obj; return x == it.x && y == it.y && width == it.width && height == it.height; } @Override public String toString() { return "{" + x + ", " + y + ", " + width + "x" + height + "}"; } }