1 /* 2 * Copyright (c) 2008, 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 * @bug 4876942 6715251 27 * @summary javap invoked without args does not print help screen 28 * @modules jdk.compiler 29 */ 30 31 import java.io.*; 32 import java.util.zip.*; 33 34 public class T4876942 { 35 public static void main(String[] args) throws Exception { 36 new T4876942().run(); 37 } 38 39 public void run() throws IOException { 40 String output = javap(); 41 verify(output, "-public", "-protected", "-private"); // check that some of the options are listed 42 43 if (errors > 0) 44 throw new Error(errors + " found."); 45 } 46 47 String javap(String... args) { 48 StringWriter sw = new StringWriter(); 49 PrintWriter out = new PrintWriter(sw); 50 //sun.tools.javap.Main.entry(args); 51 int rc = com.sun.tools.javap.Main.run(args, out); 52 if (rc != (args.length == 0 ? 2 : 0)) 53 throw new Error("javap failed. rc=" + rc); 54 out.close(); 55 return sw.toString(); 56 } 57 58 void verify(String output, String... expects) { 59 for (String expect: expects) { 60 if (output.indexOf(expect)< 0) 61 error(expect + " not found"); 62 } 63 } 64 65 void error(String msg) { 66 System.err.println(msg); 67 errors++; 68 } 69 70 int errors; 71 }