Here you can find the source of isPrimitive(Class c)
public static boolean isPrimitive(Class c)
//package com.java2s; /*/*from w w w . j a va 2 s. c o m*/ * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI * for visualizing and manipulating spatial features with geometry and attributes. * * Copyright (C) 2003 Vivid Solutions * * 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 2 * 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * For more information, contact: * * Vivid Solutions * Suite #1A * 2328 Government Street * Victoria BC V8T 5G5 * Canada * * (250)385-6040 * www.vividsolutions.com */ import java.util.HashMap; import java.util.Map; public class Main { private static Map primitiveToWrapperMap = new HashMap() { { put(byte.class, Byte.class); put(char.class, Character.class); put(short.class, Short.class); put(int.class, Integer.class); put(long.class, Long.class); put(float.class, Float.class); put(double.class, Double.class); put(boolean.class, Boolean.class); } }; public static boolean isPrimitive(Class c) { return primitiveToWrapperMap.containsKey(c); } }