code: private static int acquireFileEncodingCcsid() {
          // Get the charset represented by file.encoding
          Charset charset = null;
          String fileEncoding = System.getProperty("file.encoding");
          try {
              charset = Charset.forName(fileEncoding);
          } catch (Throwable t) {
              // Problem with the JVM's file.encoding property
          }
  
          int ccsid = getCcsid(charset);
          if (ccsid == 0) {
              System.err.println(MessageFormat.format(BootstrapConstants.messages.getString("warn.fileEncodingNotFound"), fileEncoding));
          }
          return ccsid;
      }
docs: Get the character code set identifier that represents the JVM's file
  encoding. This should only be called by the class static initializer.
  
  @return the character code set id or 0 if the code set ID could not be
  determined