In Java, determine if the field fetched from the database is empty

Source: Internet
Author: User
Tags java se

Method One: Most people use a method, intuitive, convenient, but inefficient.
1:if (s = = NULL | | s.equals (""));
Method Two: Compare string length, high efficiency, is the best I know of a method.
2:if (s = = NULL | | s.length () <= 0);
Method Three: Java SE 6.0 only begins to provide methods that are nearly equal in efficiency and method two, but for compatibility reasons, the recommended method of use
3:if (s = = NULL | | s.isempty ());

In Java, determine if the field fetched from the database is empty

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