jdk/src/java.base/share/classes/java/lang/VersionProps.java.template
changeset 36225 6ae0eebc46e9
parent 34011 b1ce08dd7f17
child 39302 aa8d0bc2a6d2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/lang/VersionProps.java.template	Thu Mar 03 12:07:13 2016 +0000
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.lang;
+
+import java.io.PrintStream;
+
+class VersionProps {
+
+
+    private static final String launcher_name =
+        "@@LAUNCHER_NAME@@";
+
+    private static final String java_version =
+        "@@VERSION_SHORT@@";
+
+    private static final String java_runtime_name =
+        "@@RUNTIME_NAME@@";
+
+    private static final String java_runtime_version =
+        "@@VERSION_STRING@@";
+
+    static {
+        init();
+    }
+
+    public static void init() {
+        System.setProperty("java.version", java_version);
+        System.setProperty("java.runtime.version", java_runtime_version);
+        System.setProperty("java.runtime.name", java_runtime_name);
+    }
+
+    /**
+     * In case you were wondering this method is called by java -version.
+     * Sad that it prints to stderr; would be nicer if default printed on
+     * stdout.
+     */
+    public static void print() {
+        print(System.err);
+    }
+
+    /**
+     * This is the same as print except that it adds an extra line-feed
+     * at the end, typically used by the -showversion in the launcher
+     */
+    public static void println() {
+        print(System.err);
+        System.err.println();
+    }
+
+    /**
+     * Give a stream, it will print version info on it.
+     */
+    public static void print(PrintStream ps) {
+        boolean isHeadless = false;
+
+        /* Report that we're running headless if the property is true */
+        String headless = System.getProperty("java.awt.headless");
+        if ( (headless != null) && (headless.equalsIgnoreCase("true")) ) {
+            isHeadless = true;
+        }
+
+        /* First line: platform version. */
+        ps.println(launcher_name + " version \"" + java_version + "\"");
+
+        /* Second line: runtime version (ie, libraries). */
+
+        String jdk_debug_level = System.getProperty("jdk.debug", "release");
+        /* Debug level is not printed for "release" builds */
+        if ("release".equals(jdk_debug_level)) {
+            jdk_debug_level = "";
+        } else {
+            jdk_debug_level = jdk_debug_level + " ";
+        }
+
+        ps.print(java_runtime_name + " (" + jdk_debug_level + "build " + java_runtime_version);
+
+        if (java_runtime_name.indexOf("Embedded") != -1 && isHeadless) {
+            // embedded builds report headless state
+            ps.print(", headless");
+        }
+        ps.println(')');
+
+        /* Third line: JVM information. */
+        String java_vm_name    = System.getProperty("java.vm.name");
+        String java_vm_version = System.getProperty("java.vm.version");
+        String java_vm_info    = System.getProperty("java.vm.info");
+        ps.println(java_vm_name + " (" + jdk_debug_level + "build " + java_vm_version + ", " +
+                   java_vm_info + ")");
+    }
+
+}
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