Bin to hexa.22to23
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The document discusses converting between binary and hexadecimal numbers. It provides two methods: 1) Divide the binary number into groups of 4 bits and convert each group to hexadecimal. 2) Convert the binary number to decimal first, then convert the decimal to hexadecimal. Examples are given to demonstrate converting binary numbers to hexadecimal using both methods.
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1. To convert a binary number to decimal, write the binary number with an implied base 2, and multiply each bit by its place value (2^0, 2^1, 2^2 etc.), then sum the results.
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The document discusses obtaining a connection to a database in Java using JDBC. It provides code examples of creating a database connection using the DriverManager class and Oracle's JDBC Thin driver. The code inserts a record into an EMP table for demonstration purposes. Best practices for database connectivity in a Java project are then covered, such as using the DAO pattern to separate data access logic from business logic. This improves testability, reusability and flexibility in switching database types.
Dao example
The document discusses improving the Data Access Object (DAO) design pattern implementation in a project using JDBC for database connectivity. It describes how the current DAO implementation creates a new Driver object on every request, which is inefficient. It recommends using the DriverManager class instead to manage a single Driver instance and create connections. The DriverManager acts as a factory class to centralize the connection creation code and avoid multiple Driver instances, improving performance.
Sessionex1
This document describes an example of using URL rewriting and hidden form fields to maintain client state. The Home page links to a Login page containing a form for a username and password. Submitting the form calls the LoginServlet, which validates the credentials against a database using a UserDAO. If valid, the user is redirected to a personalized page welcoming them by name.
Internal
This document discusses three ways to set internal styles in HTML:
1) Universal styles that apply to all instances of a tag throughout the page. For example, making all <font> tags bold.
2) Styles using identifiers that allow restricting styles to specific elements. An ID is added and referenced in the style sheet.
3) User-defined styles that can customize styles.
The examples demonstrate applying a green color to all <a> links universally and then using IDs to style two <a> links differently. Internal styles only affect the current page.
3. elements
The document discusses HTML elements and their structure. It explains that HTML elements contain a start tag, element content, and end tag. Elements can be nested within other elements. Common elements like <p>, <body>, and <html> are used to demonstrate how elements are structured and nested to form an HTML document. The document also covers empty elements, case sensitivity of tags, and the importance of including closing tags.
2. attributes
Attributes provide additional information about HTML elements. They are specified in name/value pairs within start tags. Attribute names and values are case-insensitive but it is recommended to use lowercase according to W3C standards. Common attributes include class, id, style, and title, and attribute values should always be enclosed in single or double quotes.
1 introduction to html
This document discusses HTML (Hypertext Markup Language), the most widely used language for creating web pages. It describes what HTML is, how it uses markup tags to provide structure and layout for web content. The document also explains how HTML pages are rendered and displayed in web browsers, and provides examples of common HTML tags and elements used to create basic HTML documents.
Headings
This document provides information on HTML headings, horizontal lines, and comments. It explains that headings are defined using tags from <h1> to <h6>, with <h1> being the most important and <h6> the least important. Horizontal lines are created using the <hr> tag to separate content. HTML comments are written using <!-- and --> and are ignored by browsers.
Forms
HTML forms allow users to enter and submit data to a server. The <form> element is used to create an HTML form, which can contain various input elements like text fields, checkboxes, radio buttons, and submit buttons. Common input element types include text, password, radio buttons, checkboxes, and submit buttons. Radio buttons allow a single selection from options, while checkboxes allow zero or more selections. The submit button submits the form data to the action page specified in the form tag.
Css
1. The document provides an overview of CSS (Cascading Style Sheets) and how it can be used to style web pages by applying styles to HTML elements.
2. Styles can be applied inline, via embedded style blocks, or through external style sheets. External style sheets allow controlling styles across entire websites.
3. CSS properties like font, color, size, and other attributes can be set for elements using selectors like element names, classes, IDs to format text. Additional properties control layout aspects like margins, padding, borders.
Views
VIEWs allow users to select subsets of data from one or more tables. A VIEW acts like a virtual table but contains no data itself - it just represents the result set of a SELECT statement. VIEWs provide a layer of security by restricting access to specific rows, columns, or tables. The CREATE VIEW statement is used to define a new VIEW, ALTER VIEW modifies an existing VIEW definition, and DROP VIEW removes a VIEW.
Views
VIEWs allow users to select subsets of data from one or more tables. A VIEW acts like a virtual table but contains no data itself - it just represents the result set of a SELECT statement. VIEWs provide a layer of security by restricting access to specific rows, columns, or tables. The CREATE VIEW statement is used to define a new VIEW, ALTER VIEW modifies an existing VIEW definition, and DROP VIEW removes a VIEW.
Views
VIEWs allow users to select subsets of data from one or more tables. A VIEW acts like a virtual table but contains no data itself - it just represents the result set of a SELECT statement. VIEWs provide a layer of security by restricting access to specific rows, columns, or tables. The CREATE VIEW statement is used to define a new VIEW, ALTER VIEW modifies an existing VIEW definition, and DROP VIEW removes a VIEW.
Starting jdbc
JDBC allows Java applications to connect to MySQL databases. The document provides instructions to install MySQL, download the MySQL JDBC driver from online, and select the platform-independent ZIP file version of the driver.
More from myrajendra (20)
Bin to hexa.22to23
- 1. Conversions of binary number to hexadecimal, Conversions of hexadecimal to binary http://improvec.blogspot.in/ 1
- 2. Objective On completion of this period, you would be able to know Conversion of a binary number to hexa decimal Conversion of a hexa decimal number to binary http://improvec.blogspot.in/ 2
- 3. Recap Conversions of binary number to decimal http://improvec.blogspot.in/ 3
- 4. Prerequisite Representation of Binary system Representation of Hexadecimal system Relationship between Binary and Hexadecimal http://improvec.blogspot.in/ 4
- 5. BINARY TO HEXADECIMAL http://improvec.blogspot.in/ 5
- 6. Conversion of a binary number to hexadecimal number METHOD 1 As base16 = 24, to convert a binary number to hexadecimal 4-bit binary groups (each group contains 4 binary bits) are formed in the binary number After forming the groups, each group of 4 binary bits is converted to its hexadecimal number http://improvec.blogspot.in/ 6
- 7. 1.Convert the binary number 01101110 to its equivalent hexadecimal Divide the given binary number into 4-bit binary groups (01101110)2 = (0110) (1110) = 6E (hex) (01101110)2=(6E)16 http://improvec.blogspot.in/ 7
- 8. 2.Convert the binary number 1101001101 to its equivalent hexadecimal Forming of groups of 4-bits from right hand side to left (1101001101)2 = (11) (0100) (1101) We see that the group of the most significant binary bits contains only 2 binary bits http://improvec.blogspot.in/ 8
- 9. Convert the binary number 1101001101 to its equivalent hexadecimal (contd) This can be extended to 4 binary bits by adding zeros in MSB position If MSBs are extended by adding zeros the number remains unaffected (1101001101)2 = (0011) (0100) (1101) = 34D (hex) http://improvec.blogspot.in/ 9
- 10. 3. Convert the binary number 1011100.1000101 to its equivalent hexadecimal The formation of grouping of binary bits which are after the binary point, is made from left to right 1011100.1000101 = (101)(1100).(1000)(101) = (0101)(1100).(1000)(1010) = 5C.8A (hex) http://improvec.blogspot.in/ 10
- 11. Conversion of a binary number to hexadecimal number METHOD 2 First convert a binary number to decimal number Then convert the decimal number so obtained to hexadecimal number http://improvec.blogspot.in/ 11
- 12. 1.Convert the binary number 101101 to its equivalent hexadecimal 101101 = 1*25 + 0*24 + 1*23 +1*22 + 0*21 +1*20 = 32 + 0 + 8 + 4 +0 + 1 = (45)10 http://improvec.blogspot.in/ 12
- 13. Convert the binary number 101101 to its equivalent hexadecimal (contd) Now convert 45 into hexadecimal number. division remainder 16 45 16 2 13 = D 0 2 (45)10 = (2D)16 Thus (101101)2 = (45)10 = (2D)16 http://improvec.blogspot.in/ 13