Source: http://www.codechef.com/wiki/tutorial-bitwise-operations
Explanation:
The Integer which is the power of two will always have the leftmost bit 1 and the remaining bits as 0. Let this number be x.
And the number (x-1) will never have the leftmost bit as 1. So x & (x-1) will always give 0 if the number is power of 2.
So to check whether the number is power of two, check x & (x-1) , if the answer is 0 then the number is infact power of 2.
Installing the Server, Tomcat
Installing MySql Community Server (Database)
Java Code to Create your Database, Make sure you replace username and password with the proper values:
import java.io.*;
import java.sql.*;
public class CreateDatabase{
public static void main(String[] args) {
System.out.println("Database creation example!");
Connection con = null;
try{
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection
("jdbc:mysql://localhost:3306/","root","HashMap");
try{
Statement st = con.createStatement();
BufferedReader bf = new BufferedReader
(new InputStreamReader(System.in));
System.out.println("Enter Database name:");
String database = bf.readLine();
st.executeUpdate("CREATE DATABASE "+database);
System.out.println("1 row(s) affected");
}
catch (SQLException s){
System.out.println("SQL statement is not executed!");
}
}
catch (Exception e){
e.printStackTrace();
}
}
}
Java Code to connect to the database you just created.
import java.sql.*;
public class MysqlConnect{
public static void main(String[] args) {
System.out.println("MySQL Connect Example.");
Connection conn = null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "Replace with YOUR SCHEMA NAME";
String driver = "com.mysql.jdbc.Driver";
String userName = "root";
String password = "root";
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url+dbName,userName,password);
System.out.println("Connected to the database");
conn.close();
System.out.println("Disconnected from database");
} catch (Exception e) {
e.printStackTrace();
}
}
}
Install Microsoft Visual Studio 2005 and then install the following updates:
Service Pack 1
Service Pack 1 Update
