Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static Connection getConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/databaseName";
        String username = "root";
        String password = "root";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static void main(String[] args) throws Exception {
        String id = "0001";
        float floatValue = 0001f;
        double doubleValue = 1.0001d;
        Connection conn = null;
        PreparedStatement pstmt = null;
        try {
            conn = getConnection();
            String query = "insert into double_table(id, float_column, double_column) values(?, ?, ?)";
            pstmt = conn.prepareStatement(query);
            pstmt.setString(1, id);
            pstmt.setFloat(2, floatValue);
            pstmt.setDouble(3, doubleValue);
            // execute query, and return number of rows created
            int rowCount = pstmt.executeUpdate();
            System.out.println("rowCount=" + rowCount);
        } finally {
            pstmt.close();
            conn.close();
        }
    }
}