November 2004
Intermediate to advanced
1024 pages
27h 50m
English
Content preview from Core Java™ 2 Volume II - Advanced Features, Seventh Edition
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Scrollable and Updatable Result Sets
As you have seen, the next method of the ResultSet class iterates over the rows in a result set. That is certainly adequate for a program that needs to analyze the data. However, consider a visual data display that shows a table or query result (see Figure 4-7). You usually want the user to be able to move both forward and backward in the result set. But JDBC 1 had no previous method. Programmers who wanted to implement backward iteration had to manually cache the result set data. The scrollable result set in JDBC 2 lets you move forward and backward through a result set and jump to any position in the result set.
Figure 4-7. A GUI view of a query result
Furthermore, once users see the ...
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