code: private void execute() throws Exception {
  		try (Terminal terminal = TerminalBuilder.builder().build()) {
  			showHelp(terminal);
  			showProps(terminal);
  
  			initialize(terminal);
  
  			listen(terminal);
  
  			dispose(terminal);
  		}
  	}
docs: REPLの実行
  
  @throws Exception 実行時例外