lib/javaversion.java

   1 /* Show the Java version.
   2  * Copyright (C) 2006, 2009-2021 Free Software Foundation, Inc.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 /**
  19  * This program shows the Java version.
  20  *
  21  * This program _must_ be compiled with
  22  *   javac -d . -target 1.1 javaversion.java
  23  * since its purpose is to show the version of _any_ Java implementation.
  24  *
  25  * @author Bruno Haible
  26  */
  27 public class javaversion {
  28   public static void main (String[] args) {
  29     System.out.println(System.getProperty("java.specification.version"));
  30   }
  31 }