Set Data Types by using Prepared Statement

In this section we are going to learn the method for setting data types (String, int, float and double) in the PreparedStatement interface of java.sql package.

Set Data Types by using Prepared Statement

Set Data Types by using Prepared Statement

     

In this section we are going to learn the method for setting data types (String, int, float and double) in the PreparedStatement interface of java.sql package. We know that the data types of MySQL and java programming language are not same but we need some mechanism for transferring the data to each other Java and MySQL. Mapping between both java and MySQL provides the facility for supporting each data types like: 

Java data type    MySQL data type
int   integer (INTEGER)
double  double, float (DOUBLE, FLOAT)
float  real (REAL)

Description of program:

Here, we are going to set some java data types by using the PreparedStatement with the help of this program. The program first of all establishes the connection with MySQL database through the JDBC driver. After establishing a connection the prepareStatement takes SQL query statement and then returns the PreparedStatement object. Now,  we will set all data types like String, int, double and float by using some methods like: setString, setInt, setDouble and setFloat method. These methods set the data in the database table (student) individually according to it's nature that is supported by both java and MySQL. Data is then added in the database table (student) that can be seen in a message as "row(s) affected" otherwise a display phrase as "SQL statement is not executed!". 

Here is the code of program:

import java.sql.*;

public class SetDataTypes{
  public static void main(String[] args) {
  System.out.println("Set string,ingeger,double 
and float example by using the Prepared Statement!");
  Connection con = null;
  try{
  Class.forName("com.mysql.jdbc.Driver");
  con = DriverManager.getConnection("jdbc:mysql:
//localhost:3306/jdbctutorial","root","root");
  try{
  String sql = "INSERT student VALUES(?,?,?,?)";
  PreparedStatement prest = con.prepareStatement(sql);
  prest.setString(1,"deepak");
  prest.setInt(2,95);
  prest.setDouble(3,32.50);
  prest.setFloat(4,41.52f);
  int row = prest.executeUpdate();
  System.out.println(row + " row(s) affected)");
  }
  catch (SQLException s){
  System.out.println("SQL statement is not executed!");
  }
  }
  catch (Exception e){
  e.printStackTrace();
  }
  }
}

Download this example.

Database Table: student 

Stu_name Stu_marks Stu_ave Stu_total
raju (NULL) (NULL) (NULL)
virendra 86 35.255 56.05
deepak 95 32.5 41.52

Output of program:

C:\vinod\jdbc\jdbc\PreparedStatement>javac SetDataTypes.java

C:\vinod\jdbc\jdbc\PreparedStatement>java SetDataTypes
Set string,ingeger,double and float example by using the Prepared Statement!
1 row(s) affected)

After executing the program:

Database Table: student

Stu_name Stu_marks Stu_ave Stu_total
raju (NULL) (NULL) (NULL)
virendra 86 35.255 56.05
deepak 95 32.5 41.52
vinod 86 47.52 65.025

Tutorials

  1. Mapping MySQL Data Types in Java
  2. Connecting to a MySQL Database in Java
  3. Creating a Database in MySQL
  4. Creating a Database Table
  5. Creating a MySQL Database Table to store Java Types
  6. Description of Database Table
  7. Deleting a Table from Database
  8. Retrieving Tables from a Database
  9. Inserting values in MySQL database table
  10. Retrieving All Rows from a Database Table
  11. Adding a New Column Name in Database Table
  12. Change Column Name of a Table
  13. Make Unique Column in Database Table
  14. Remove Unique Column in Database Table
  15. Arrange a Column of Database Table
  16. Arrange a Column of Database Table
  17. Sum of Column in a Database Table
  18. Deleting All Rows from a Database Table
  19. Delete a Specific Row from a Database Table
  20. Delete a Column from a Database Table
  21. Join tables in the specific database
  22. Join tables with the NATURAL LEFT JOIN operation
  23. Join tables with the NATURAL RIGHT JOIN operation
  24. Cross Join Tables in a Specific Database
  25. Prepared Statement Set Object
  26. Statement Batch Update
  27. Prepared Statement With Batch Update
  28. Select Records Using Prepared Statement
  29. Update Records using Prepared Statement
  30. Inserting Records using the Prepared Statement
  31. Count Records using the Prepared Statement
  32. Deleting Records using the Prepared Statement
  33. Using the Prepared Statement Twice
  34. Set Data Types by using Prepared Statement
  35. Set byte, short and long data types by using the Prepared Statement
  36. Prepared Statement Set Big Decimal
  37. Set Date by using the Prepared Statement
  38. Set Time by using the Prepared Statement
  39. Set Timestamp by using the Prepared Statement
  40. Copy Table in a MySQL Database