Java tutorial
/* * Copyright 2011 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. */ package com.google.gwt.touch.client; /** * A simple point class. */ public class Point { private final double x; private final double y; public Point() { this(0.0, 0.0); } public Point(double x, double y) { this.x = x; this.y = y; } public Point(Point c) { this(c.x, c.y); } /** * Divide this point {@link Point} by specified point and return the result. * Does not modified this {@link Point}. * * @param c the value by which to divide * @return the resulting point */ public Point div(Point c) { return new Point(x / c.x, y / c.y); } @Override public boolean equals(Object obj) { if (!(obj instanceof Point)) { return false; } Point c = (Point) obj; return (x == c.x) && (y == c.y); } /** * Get the x value of the point. * * @return the x value */ public double getX() { return x; } /** * Get the y value of the point. * * @return the y value */ public double getY() { return y; } @Override public int hashCode() { return (int) x ^ (int) y; } /** * Subtract the specified {@link Point} from this point and return the result. * Does not modified this {@link Point}. * * @param c the value to subtract * @return the resulting point */ public Point minus(Point c) { return new Point(x - c.x, y - c.y); } /** * Multiple this point {@link Point} by specified point and return the result. * Does not modified this {@link Point}. * * @param c the value by which to multiply * @return the resulting point */ public Point mult(Point c) { return new Point(x * c.x, y * c.y); } /** * Add the specified {@link Point} to this point and return the result. Does * not modified this {@link Point}. * * @param c the value to add * @return the resulting point */ public Point plus(Point c) { return new Point(x + c.x, y + c.y); } @Override public String toString() { return "Point(" + x + "," + y + ")"; } }