import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class Main {

    public static void main(String[] args) throws Exception {

        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        PreparedStatement pstmt = null;

        try {
            // SETUP
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://...");

            stmt = conn.createStatement();
            stmt.execute("DROP TABLE IF EXISTS ttt");

            stmt.execute("CREATE TABLE ttt (value FLOAT)");

            // INPUT VALUE
            float input = 1.223473E6f;
            print(" Input", input);
            pstmt = conn.prepareStatement("INSERT INTO ttt VALUES (?)");
            pstmt.setFloat(1, input);
            pstmt.execute();

            // OUTPUT VALUES
            rs = stmt.executeQuery("SELECT value, "
                    + "AVG(value) as avg, MIN(value) as min, "
                    + "MAX(value) as max, value + 0 as plus, "
                    + "value * 1 as mult, "
                    + "cast(value as decimal) as valcast "
                    + "FROM ttt;");
            rs.next();
            System.out.println();
            print("Output", rs.getFloat("value"));
            print("   AVG", rs.getFloat("avg"));
            print("   MIN", rs.getFloat("min"));
            print("   MAX", rs.getFloat("max"));
            print("    +0", rs.getFloat("plus"));
            print("    *1", rs.getFloat("mult"));
            print("  CAST", rs.getFloat("valcast"));

        } finally {
            if (stmt != null)
                stmt.close();
            if (pstmt != null)
                pstmt.close();
            if (conn != null)
                conn.close();
        }

    }

    private static void print(String name, float value) {
        System.out.println(name + ": " + value + " (0x"
            + Integer.toHexString(Float.floatToRawIntBits(value)) + ")");
    }

Input: 1223473.0 (0x49955988)

Output: 1223470.0 (0x49955970)
   AVG: 1223473.0 (0x49955988)
   MIN: 1223473.0 (0x49955988)
   MAX: 1223473.0 (0x49955988)
    +0: 1223473.0 (0x49955988)
    *1: 1223473.0 (0x49955988)
  CAST: 1223473.0 (0x49955988)

System.out.println(1223473f == 1223470f);  // gives false
System.out.println(123456789f == 123456791f);  // gives true (too many digits)

mysql> create table ttt (value float);
Query OK, 0 rows affected (0.04 sec)

mysql> INSERT INTO ttt VALUES (1223473);
Query OK, 1 row affected (0.00 sec)

mysql> select * from ttt;
+---------+
| value   |
+---------+
| 1223470 |
+---------+
1 row in set (0.00 sec)

mysql> SELECT * FROM ttt WHERE value = 1223470;
Empty set (0.00 sec)

mysql> SELECT * FROM ttt WHERE value = 1223473;
+---------+
| value   |
+---------+
| 1223470 |
+---------+
1 row in set (0.00 sec)