This is an example of how to determine if a ResultSet is Scrollable. Checking if a ResultSet is scrollable or not implies that you should:
- Load the JDBC driver, using the
forName(String className)API method of the Class. In this example we use the MySQL JDBC driver. - Create a Connection to the database. Invoke the
getConnection(String url, String user, String password)API method DriverManager to create the connection. - Create a Statement, using the
createStatement() API method of the Connection. - Execute the query to the database, using the
executeQuery(String sql)API method of the Statement. The results of the query are set in a ResultSet. - Invoke the
getType()API method of the ResultSet, in order to get the type of the result set. If the type is equal to TYPE_SCROLL_INSENSITIVE or TYPE_SCROLL_SENSITIVE, then the Result set is scrollable.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class DetermineScrollableResultSet {
public static void main(String[] args) {
Connection connection = null;
try {
// Load the MySQL JDBC driver
String driverName = "com.mysql.jdbc.Driver";
Class.forName(driverName);
// Create a connection to the database
String serverName = "localhost";
String schema = "test";
String url = "jdbc:mysql://" + serverName + "/" + schema;
String username = "username";
String password = "password";
connection = DriverManager.getConnection(url, username, password);
System.out.println("Successfully Connected to the database!");
} catch (ClassNotFoundException e) {
System.out.println("Could not find the database driver " + e.getMessage());
} catch (SQLException e) {
System.out.println("Could not connect to the database " + e.getMessage());
}
try {
// Get a result set containing all data from test_table
Statement statement = connection.createStatement();
ResultSet results = statement.executeQuery("SELECT * FROM test_table");
// Get type of the result set
int type = results.getType();
if (type == ResultSet.TYPE_SCROLL_INSENSITIVE || type == ResultSet.TYPE_SCROLL_SENSITIVE) {
System.out.println("Result set is scrollable");
} else {
System.out.println("Result set is not scrollable");
}
} catch (SQLException e) {
System.out.println("Could not retrieve data from the database " + e.getMessage());
}
}
}
Example Output:
Successfully Connected to the database!
Result set is not scrollable
This was an example of how to determine if a ResultSet is Scrollable in Java.
