1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @summary Busy infinite loop client, calculating E number 27 */ 28 public class Livelock { 29 30 public static double elim; 31 main(String[] args)32 public static void main(String[] args) { 33 System.out.printf( 34 "%24s %24s %24s %24s %24s %24s%n", 35 "n", "n!", "e = lim(...)", "e = taylor series", 36 "err e-lim", "err e-taylor"); 37 38 while (true) { 39 double esum = 2; 40 double nfac = 1; 41 double iter = 1; 42 for (double n = 1; !Double.isInfinite(n) && !Double.isNaN(n) ; n = n * 2) { 43 elim = Math.pow(1 + 1 / n, n); 44 45 iter += 1; 46 nfac *= iter; 47 esum += 1 / nfac; 48 49 System.out.printf("% 24.16e % 24.16e % 24.16e % 24.16e" 50 + "%- 24.16e %- 24.16e%n", 51 n, nfac, elim, esum, (Math.E - elim), (Math.E - esum)); 52 } 53 } 54 } 55 } 56