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public class Lazy {
  private static boolean flag = false;  

  private static final ThreadLocal<Connection> connectionHolder
    = new ThreadLocal<Connection>() {
      public Connection initialValue() {
        try {
          Connection conn = DriverManager.getConnection("connectionstring");
          flag = true;
          return conn;
	        } catch (SQLException e) {
          return null;
        }
      }
    };
    
  public static Connection getConnection() {
    return connectionHolder.get();
  }

  public static void main(String[] args) {
    Connection conn = getConnection();
    System.out.println(flag);
  }
}