jdbc program type 4 in eclipse
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I am getting an error Communication failure during handshake. Is there a server running on localhost:3306? i have written a jdbc program using type 4 jdbc driver and i want to perform a delete operation  and the ide is eclipse.
code: 

    Class.forName("com.mysql.jdbc.Driver");
    		String cs="jdbc:mysql://localhost:3306/account_db";
    		Connection con=DriverManager.getConnection(cs,"root","vishwas7890");
    		PreparedStatement ps=con.prepareStatement("delete from empde emp_id=?");
    		Scanner s=new Scanner(System.in);
    		while(true)
    		{
    			System.out.println("enter the emp_id :");
    			int ac_id=s.nextInt();
    			ps.setInt(1,emp_id);
    			ps.executeUpdate();
    			System.out.println("one emp_id is deleted:");
    			System.out.println("one more emp_id?(yes/no)");
    			String choice=s.next();
    			if(choice.equals("no"))
    			System.out.println("empde is exit");
    			break;
    		}
          ps.close();
          con.close();