Here you can find the source of growRectangle(Rectangle2D rec, double amount_x, double amount_y)
public static Rectangle2D growRectangle(Rectangle2D rec, double amount_x, double amount_y)
//package com.java2s; /*//from www .jav a 2 s. c o m * Copyright (c) 2008 Pierre Dragicevic <dragice@lri.fr> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.awt.geom.Rectangle2D; public class Main { public static Rectangle2D growRectangle(Rectangle2D rec, double amount_x, double amount_y) { return new Rectangle2D.Double(rec.getX() - amount_x / 2, rec.getY() - amount_y / 2, rec.getWidth() + amount_x, rec.getHeight() + amount_y); } }