1 /*
2 * Copyright (c) 1999, 2016, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.lang;
27
28 import java.io.PrintStream;
29 import java.util.ArrayList;
30 import java.util.List;
31 import java.util.Optional;
32
33 class VersionProps {
34
35
36 private static final String launcher_name =
37 "@@LAUNCHER_NAME@@";
38
39 private static final String java_version =
40 "@@VERSION_SHORT@@";
41
42 private static final String java_runtime_name =
43 "@@RUNTIME_NAME@@";
44
45 private static final String java_runtime_version =
46 "@@VERSION_STRING@@";
47
48 private static final String VERSION_NUMBER =
49 "@@VERSION_NUMBER@@";
50
51 private static final String VERSION_BUILD =
52 "@@VERSION_BUILD@@";
53
54 private static final String VERSION_PRE =
55 "@@VERSION_PRE@@";
56
57 private static final String VERSION_OPT =
58 "@@VERSION_OPT@@";
59
60 static {
61 init();
62 }
63
64 public static void init() {
65 System.setProperty("java.version", java_version);
66 System.setProperty("java.runtime.version", java_runtime_version);
67 System.setProperty("java.runtime.name", java_runtime_name);
68 }
69
70 static List<Integer> versionNumbers() {
71 List<Integer> versionNumbers = new ArrayList<>(4);
72 int prevIndex = 0;
73 int index = VERSION_NUMBER.indexOf('.');
74 while (index > 0) {
75 versionNumbers.add(
76 Integer.parseInt(VERSION_NUMBER, prevIndex, index, 10));
77 prevIndex = index + 1; // Skip the period
78 index = VERSION_NUMBER.indexOf('.', prevIndex);
79 }
80 versionNumbers.add(Integer.parseInt(VERSION_NUMBER,
81 prevIndex, VERSION_NUMBER.length(), 10));
82 return versionNumbers;
83 }
84
85 static Optional<String> pre() {
86 return optionalOf(VERSION_PRE);
87 }
88
89 static Optional<Integer> build() {
90 return VERSION_BUILD.isEmpty() ?
91 Optional.empty() :
92 Optional.of(Integer.parseInt(VERSION_BUILD));
93 }
94
95 static Optional<String> optional() {
96 return optionalOf(VERSION_OPT);
97 }
98
99 // Treat empty strings as value not being present
100 private static Optional<String> optionalOf(String value) {
101 if (!value.isEmpty()) {
102 return Optional.of(value);
103 } else {
104 return Optional.empty();
105 }
106 }
107
108 /**
109 * In case you were wondering this method is called by java -version.
110 * Sad that it prints to stderr; would be nicer if default printed on
111 * stdout.
112 */
113 public static void print() {
114 print(System.err);
115 }
116
117 /**
118 * This is the same as print except that it adds an extra line-feed
119 * at the end, typically used by the -showversion in the launcher
120 */
121 public static void println() {
122 print(System.err);
123 System.err.println();
124 }
125
126 /**
127 * Give a stream, it will print version info on it.
128 */
129 public static void print(PrintStream ps) {
130 boolean isHeadless = false;
131
132 /* Report that we're running headless if the property is true */
133 String headless = System.getProperty("java.awt.headless");
134 if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {
135 isHeadless = true;
136 }
137
138 /* First line: platform version. */
139 ps.println(launcher_name + " version \"" + java_version + "\"");
140
141 /* Second line: runtime version (ie, libraries). */
142
143 String jdk_debug_level = System.getProperty("jdk.debug", "release");
144 /* Debug level is not printed for "release" builds */
145 if ("release".equals(jdk_debug_level)) {
146 jdk_debug_level = "";
147 } else {
148 jdk_debug_level = jdk_debug_level + " ";
149 }
150
151 ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version);
152
153 if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {
154 // embedded builds report headless state
155 ps.print(", headless");
156 }
157 ps.println(')');
158
159 /* Third line: JVM information. */
160 String java_vm_name = System.getProperty("java.vm.name");
161 String java_vm_version = System.getProperty("java.vm.version");
162 String java_vm_info = System.getProperty("java.vm.info");
163 ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " +
164 java_vm_info + ")");
165 }
166
167 }