Vishal Pawar

Programming language Programming language is set of instruction which can be given as input to some software component like compiler or interpreter to make it machine understandable. Compiler :   A  compiler  is a  computer program  (or set of programs) that transforms  source code  written in a  programming language  (the  source language ) into another computer language.

Java Java is a programming language and computing platform first released by Sun Microsystems in 1995. It is the underlying technology that powers state-of-the-art programs including utilities, games, and business applications. Java runs on more than 850 million personal computers worldwide, and on billions of devices worldwide, including mobile and TV devices. Java is a computer programming language. It enables programmers to write computer instructions using English based commands, instead of having to write in numeric codes. It’s known as a “high-level” language because it can be read and written easily by humans. Like English, Java has a set of rules that determine how the instructions are written. These rules are known as its “syntax”. Once a program has been written, the high-level instructions are translated into numeric codes that computers can understand and execute.

PHP: Sending Email (Text/HTML/Attachments) Sending a Simple Text Email At first let's consider how to send a simple text email messages. PHP includes the  mail()  function for sending email, which takes three basic and two optional parameters. These parameters are, in order, the email address to send to, the subject of the email, the message to be sent, additional headers you want to include and finally an additional parameter to the Sendmail program. The  mail()  function returns True if the message is sent successfully and False otherwise.  Example: //define the receiver of the email $to = 'youraddress@example.com'; //define the subject of the email $subject = 'Test email'; //define the message to be sent. Each line should be separated with \n $message = "Hello World!\n\nThis is my first mail."; //define the headers we want passed. Note that they are separated with \r\n $headers = "From: webmaster@example.com\r\nReply-To:...

Creating a Custom Cell Renderer in a JTable Component table cell renderer need to implement method  getTableCellRendererComponent() from TableCellRenderer  

Instances of this class represent the "windows" which the desktop or "window manager" is managing. Instances that do not have a parent (that is, they are built using the constructor, which takes a  Display  as the argument) are described as  top level  shells. Instances that do have a parent are described as  secondary  or  dialog  shells. Instances are always displayed in one of the maximized, minimized or normal states: When an instance is marked as  maximized , the window manager will typically resize it to fill the entire visible area of the display, and the instance is usually put in a state where it can not be resized (even if it has style  RESIZE ) until it is no longer maximized. When an instance is in the  normal  state (neither maximized or minimized), its appearance is controlled by the style constants which were specified when it was created and the restrictions of the window manager (see below). When an instanc...

The  Session Initiation Protocol  ( SIP ) is an  IETF -defined  signaling   protocol , widely used for controlling  multimedia   communication sessions  such as  voice  and  video  calls over  Internet Protocol (IP). The protocol can be used for creating, modifying and terminating two-party ( unicast ) or multiparty ( multicast )  sessions  consisting of one or several  media streams . The modification can involve changing addresses or  ports , inviting more participants, and adding or deleting media streams. Other feasible application examples include  video conferencing , streaming multimedia distribution,  instant messaging ,  presence information ,  file transfer  and  online games . SIP was originally designed by  Henning Schulzrinne  and  Mark Handley  starting in 1996. The latest version of the specification is RFC 3261 from the  I...

Overview When writing applications in the  Standard Widget Toolkit  (SWT), you may need to use  layouts  to give your windows a specific look. A layout controls the position and size of children in a  Composite . Layout classes are subclasses of the abstract class  Layout . SWT provides several standard layout classes, and you can write custom layout classes. In SWT, positioning and sizing does not happen automatically. Applications can decide to size and place a  Composite 's children initially, or in a resize listener. Another option is to specify a layout class to position and size the children. If children are not given a size, they will have zero size and they cannot be seen. The diagram below illustrates a few general terms that are used when discussing layouts. The  Composite  (in this case, a  TabFolder ) has a  location ,  clientArea  and  trim . The size of the  Composite  is the size of the ...

Rich Client Applications (RCPs) typically require complex, interactive charts and other non-standard widgets. Unfortunately, there are not many open source (or even commercial) SWT charting libraries yet, so RCP developers either have to develop their own or use an existing Swing components. Fortunately, the RCP 3.x platform includes the SWT_AWT bridge, which allows RCPs to integrate Swing components (at least on Windows and Linux) The SWT_AWT Bridge What is the SWT_AWT Bridge and how does it work? Suppose we want to embed a Swing JPanel inside an Eclipse RCP View: Composite swtAwtComponent = new Composite(parent, SWT.EMBEDDED); java.awt.Frame frame = SWT_AWT.new_Frame( swtAwtComponent ); javax.swing.JPanel panel = new javax.swing.JPanel( ); frame.add(panel); The  new_Frame()  method creates a  partially  thread-safe SWT Composite container, swtAwtComponent  , for the AWT or Swing component. Notice that the  swtAwtComponent must be created using the SW...

The  Standard Widget Toolkit  ( SWT ) is a graphical  widget toolkit  for use with the  Java platform . It was originally developed by  IBM  and is now maintained by the  Eclipse Foundation  in tandem with the  Eclipse IDE . It is an alternative to the  AWT  and  Swing  Java GUI  toolkits provided by  Sun Microsystems  as part of the  Java Platform, Standard Edition . SWT is written in  Java . To display GUI elements, the SWT implementation accesses the native GUI libraries of the operating system using JNI ( Java Native Interface ) in a manner that is similar to those programs written using operating system-specific  APIs . Programs that call SWT are portable, but the implementation of the toolkit, despite the fact that part of it is written in Java, is unique for each platform. SWT is the UI library used by Eclipse. SWT provides the some rich UI components on several platforms. The na...