6.1 ResultSet Overview

A ResultSet is a Java object that contains the results of executing an SQL query. In other words, it contains the rows that satisfy the conditions of the query. The data stored in a ResultSet object is retrieved through a set of get methods that allows access to the various columns of the current row. The ResultSet.next method is used to move to the next row of the ResultSet, making it the current row.
The general form of a result set is a table with column headings and the corresponding values returned by a query. For example, if your query is SELECT a, b, c FROM Table1, your result set will have the following form:

a
b c
---------- ------------ -----------
12345 Cupertino 2459723.495
83472 Redmond 1.0
83492 Boston 35069473.43

The following code fragment is an example of executing an SQL statement that will return a collection of rows, with column a as an int, column b as a String, and column c as a float:
java.sql.Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM Table1");
while (rs.next()) {
// retrieve and print the values for the current row
int i = rs.getInt("a");
String s = rs.getString("b");
float f = rs.getFloat("c");
System.out.println("ROW = " + i + " " + s + " " + f);
}