62 lines
2.2 KiB
Java
62 lines
2.2 KiB
Java
/*
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* Copyright (c) 2017, 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.
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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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import java.security.NoSuchAlgorithmException;
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import java.security.Signature;
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/*
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* This class is used for returning some specific JDK information.
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*/
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public class JdkUtils {
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static final String M_JAVA_RUNTIME_VERSION = "javaRuntimeVersion";
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static final String M_IS_SUPPORTED_SIGALG = "isSupportedSigalg";
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// Returns the JDK build version.
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static String javaRuntimeVersion() {
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return System.getProperty("java.runtime.version");
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}
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// Checks if the specified signature algorithm is supported by the JDK.
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static boolean isSupportedSigalg(String sigalg) {
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boolean isSupported = false;
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try {
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isSupported = Signature.getInstance(sigalg) != null;
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} catch (NoSuchAlgorithmException e) { }
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if (!isSupported) {
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System.out.println(sigalg + " is not supported yet.");
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}
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return isSupported;
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}
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public static void main(String[] args) {
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if (M_JAVA_RUNTIME_VERSION.equals(args[0])) {
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System.out.print(javaRuntimeVersion());
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} else if (M_IS_SUPPORTED_SIGALG.equals(args[0])) {
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System.out.print(isSupportedSigalg(args[1]));
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}
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}
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}
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