prod/net/jaekl/cfb/util/Env.java

   1 package net.jaekl.cfb.util;
   2
   3 public class Env {
   4         static volatile Env m_inst = null;
   5
   6         Env() {}
   7
   8         private static Env getInstance()
   9         {
  10                 Env inst = m_inst;
  11                 if (null == inst) {
  12                         synchronized(Env.class) {
  13                                 if (null == m_inst) {
  14                                         m_inst = new Env();
  15                                 }
  16                                 inst = m_inst;
  17                         }
  18                 }
  19                 return inst;
  20         }
  21
  22         String getEnv(String variableName) { return System.getenv(variableName); }
  23
  24         public static String get(String variableName) {
  25                 return getInstance().getEnv(variableName);
  26         }
  27 }