import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import com.mysql.jdbc.Connection;

public class JDBCSelect3 {
	public static void main(String[] args) {
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			System.err.println("Driver class not found");
			e.printStackTrace();
		}
		Connection con = null;

		try {
			con =
				(Connection) DriverManager.getConnection(
					"jdbc:mysql://localhost/jdbctest/",
					"mario",
					"thePassword");
		} catch (SQLException e1) {
			System.err.println("Error establishing database connection");
			Throwable t = e1;
			while (t != null) {
		   	System.err.println("Type: " + t.getClass().getName());
      		System.err.println("Message: " + t.getMessage());
      		System.err.println("-----");
      		t = t.getCause();
			}
		}

		Statement stmt = null;
		try {
			stmt =
				(Statement) con.createStatement(
					ResultSet.TYPE_SCROLL_SENSITIVE,
					ResultSet.CONCUR_UPDATABLE);
		} catch (SQLException e2) {
			System.err.println("Error creating SQL-Statement");
			Throwable t = e2;
			while (t != null) {
   			System.err.println("Type: " + t.getClass().getName());
      		System.err.println("Message: " + t.getMessage());
      		System.err.println("-----");
      		t = t.getCause();
			}
		}

		try {
			ResultSet uprs =
				(ResultSet) stmt.executeQuery("SELECT * FROM EMPLOYEE;");
			int namePos = uprs.findColumn("LNAME");

			while (uprs.isLast() == false) {
				uprs.next();
				if (uprs.getString(namePos).compareTo("Wallace") == 0) {
					uprs.updateString(namePos, "Doe");
					uprs.updateRow();
				}
			}

		} catch (SQLException e3) {
			System.err.println("Error selecting values from table EMPLOYEE");
			Throwable t = e3;
			while (t != null) {
   			System.err.println("Type: " + t.getClass().getName());
      		System.err.println("Message: " + t.getMessage());
      		System.err.println("-----");
      		t = t.getCause();
			}
		}
	}
}