A PreparedStatement object represents a precompiled SQL statement. The PreparedStatement interface extends the Statement interface. The precompiled SQL statement has IN parameters for which values are being set with the setter methods of the PreparedStatement interface. A 'setter' method is included for each of the Java data types that map to a SQL data type. The JDBC driver converts the Java data type to an SQL data type. The IN parameter values are set with parameter index. For example, update a Catalog table with the following definition using PreparedStatement :

CatalogId NUMBER
Journal VARCHAR(255)
Publisher VARCHAR(255)
Title VARCHAR(255)
Author VARCHAR(255)

Set Publisher column value to Oracle Publishing, and Journal column values to Oracle Magazine, where CatalogId is 1, referred to the code below:

PreparedStatement pstmt = connection.prepareStatement("UPDATE CATALOG SET Journal=? AND Publisher=? WHERE CatalogId=?");
pstmt.setString(1, "Oracle Magazine");
pstmt.setString(2, "Oracle Publishing");
pstmt.setInt(3, 1);
pstmt.executeUpdate();

If the database supports statement pooling, PreparedStatement objects are pooled by default. In JDBC 4.0, the methods discussed in the following table have been added to the PreparedStatement interface: