Here you can find the source of getDefaultSSLProtocol()
public static String getDefaultSSLProtocol()
//package com.java2s; /*// ww w .j a v a2s .co m * Copyright (C) 2008-2018 Ping Identity Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License (GPLv2 only) * or the terms of the GNU Lesser General Public License (LGPLv2.1 only) * as published by the Free Software Foundation. * * This program 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses>. */ import java.util.concurrent.atomic.AtomicReference; public class Main { /** * The default protocol string that will be used to create SSL contexts when * no explicit protocol is specified. */ private static final AtomicReference<String> DEFAULT_SSL_PROTOCOL = new AtomicReference<>("TLSv1"); /** * Retrieves the SSL protocol string that will be used by calls to * {@link #createSSLContext()} that do not explicitly specify which protocol * to use. * * @return The SSL protocol string that will be used by calls to create an * SSL context that do not explicitly specify which protocol to use. */ public static String getDefaultSSLProtocol() { return DEFAULT_SSL_PROTOCOL.get(); } }