How to Efficiently Iterate Through a Java ResultSet and Extract Values from a Database Table?

Iterating Through a ResultSet in Java

When dealing with result sets in Java, it is essential to extract the values efficiently. This question revolves around extracting values from the dbo.Locate table and manipulating them using a ResultSet.

To retrieve the values from the dbo.Locate table, a query is executed:

String query = "SELECT rlink_id, COUNT(*)"
             + "FROM dbo.Locate  "
             + "GROUP BY rlink_id ";

Once the query is executed, a ResultSet is obtained. To iterate through the result set and extract the values, the following code can be used:

List<String> sids = new ArrayList<String>();
List<String> lids = new ArrayList<String>();

Statement stmt = yourconnection.createStatement();
try {
    ResultSet rs4 = stmt.executeQuery(query);

    while (rs4.next()) {
        sids.add(rs4.getString(1));
        lids.add(rs4.getString(2));
    }
} finally {
    stmt.close();
}

This code creates two lists, sids and lids, to store the values of the rlink_id and COUNT(*) columns, respectively. The while loop iterates through the result set, adding each rlink_id and COUNT(*) value to the corresponding list.

Finally, the extracted values can be converted into arrays using the toArray() method:

String show[] = sids.toArray(sids.size());
String actuate[] = lids.toArray(lids.size());

By following these steps, you can efficiently iterate through a ResultSet in Java and extract the desired values.

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