114 lines
3.9 KiB
Plaintext
114 lines
3.9 KiB
Plaintext
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/*
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* Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang;
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import java.io.PrintStream;
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class VersionProps {
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private static final String launcher_name =
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"@@LAUNCHER_NAME@@";
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private static final String java_version =
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"@@VERSION_SHORT@@";
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private static final String java_runtime_name =
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"@@RUNTIME_NAME@@";
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private static final String java_runtime_version =
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"@@VERSION_STRING@@";
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static {
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init();
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}
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public static void init() {
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System.setProperty("java.version", java_version);
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System.setProperty("java.runtime.version", java_runtime_version);
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System.setProperty("java.runtime.name", java_runtime_name);
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}
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/**
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* In case you were wondering this method is called by java -version.
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* Sad that it prints to stderr; would be nicer if default printed on
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* stdout.
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*/
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public static void print() {
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print(System.err);
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}
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/**
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* This is the same as print except that it adds an extra line-feed
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* at the end, typically used by the -showversion in the launcher
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*/
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public static void println() {
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print(System.err);
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System.err.println();
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}
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/**
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* Give a stream, it will print version info on it.
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*/
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public static void print(PrintStream ps) {
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boolean isHeadless = false;
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/* Report that we're running headless if the property is true */
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String headless = System.getProperty("java.awt.headless");
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if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {
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isHeadless = true;
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}
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/* First line: platform version. */
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ps.println(launcher_name + " version \"" + java_version + "\"");
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/* Second line: runtime version (ie, libraries). */
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String jdk_debug_level = System.getProperty("jdk.debug", "release");
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/* Debug level is not printed for "release" builds */
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if ("release".equals(jdk_debug_level)) {
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jdk_debug_level = "";
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} else {
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jdk_debug_level = jdk_debug_level + " ";
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}
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ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version);
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if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {
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// embedded builds report headless state
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ps.print(", headless");
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}
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ps.println(')');
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/* Third line: JVM information. */
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String java_vm_name = System.getProperty("java.vm.name");
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String java_vm_version = System.getProperty("java.vm.version");
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String java_vm_info = System.getProperty("java.vm.info");
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ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " +
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java_vm_info + ")");
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}
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}
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