Writing a computer program in java

According to Weizenbaum, ELIZA's ability to be "incrementally improved" by various users made it similar to Eliza Doolittle, [6] since Eliza Doolittle was taught to speak with an upper-class accent in Shaw's play. Weizenbaum first implemented ELIZA in his own SLIP list-processing language, where, depending upon the initial entries by the user, the illusion of human intelligence could appear, or be dispelled through several interchanges.

Writing a computer program in java

Java APIs are libraries of compiled code that you can use in your programs. They let you add ready-made and customizable functionality to save you programming time. The simple program in this lesson uses a Java API to print a line of text to the console.

The console printing capability is provided in the API ready for you to use; you supply the text to be printed.

writing a computer program in java

Java programs are run or interpreted by another program called the Java VM. If you are familiar with Visual Basic or another interpreted language, this concept is probably familiar to you.

Rather than running directly on the native operating system, the program is interpreted by the Java VM for the native operating system. This means that any computer system with the Java VM installed can run Java programs regardless of the computer system on which the applications were originally developed.

4 Ways to Write Your First Program in Java - wikiHow

For example, a Java program developed on a Personal Computer PC with the Windows NT operating system should run equally well without modification on a Sun Ultra workstation with the Solaris operating system, and vice versa. Setting Up Your Computer Before you can write and run the simple Java program in this lesson, you need to install the Java platform on your computer system.

writing a computer program in java

The Java platform is available free of charge from the Java web site. The download page contains the information you need to install and configure the Java platform for writing and running Java programs. Make sure you have the Java platform installed and configured for your system before you try to write and run the simple program presented next.

Writing a Program The easiest way to write a simple program is with a text editor. So, using the text editor of your choice, create a text file with the following text, and be sure to name the text file ExampleProgram.

Java programs are case sensitive, so if you type the code in yourself, pay particular attention to the capitalization. Compiling the Program A program has to be converted to a form the Java VM can understand so any computer with a Java VM can interpret and run the program.

Compiling a Java program means taking the programmer-readable text in your program file also called source code and converting it to bytecodes, which are platform-independent instructions for the Java VM.


Part of the configuration process for setting up the Java platform is setting the class path. The class path can be set using either the -classpath option with the javac compiler command and java interpreter command, or by setting the CLASSPATH environment variable.

You need to set the class path to point to the directory where the ExampleProgram class is so the compiler and interpreter commands can find it. Interpreting and Running the Program Once your program successfully compiles into Java bytecodes, you can interpret and run applications on any Java VM, or interpret and run applets in any Web browser with a Java VM built in such as Netscape or Internet Explorer.

Interpreting and running a Java program means invoking the Java VM byte code interpreter, which converts the Java byte codes to platform-dependent machine codes so your computer can understand and run the program.

The Java interpreter is invoked at the command line on Unix and DOS shell operating systems as follows: Common Compiler and Interpreter Problems If you have trouble compiling or running the simple example in this lesson, refer to the Common Compiler and Interpreter Problems lesson in The Java Tutorial for troubleshooting help.

Code Comments Code comments are placed in source files to describe what is happening in the code to someone who might be reading the file, to comment-out lines of code to isolate the source of a problem for debugging purposes, or to generate API documentation.

To these ends, the Java language supports three kinds of comments:About the Program Computer Programmer/Analyst is a three-year advanced diploma program in which students learn the latest skills needed by developers in industry.

Java Magazine, a bimonthly, digital-only publication, is an essential source of knowledge about Java technology, the Java programming language, and Java-based applications for people who rely on them in their professional careers, or who aspire to.

It includes profiles of innovative Java applications, Java technical how-to's, Java community. In order to start writing programs in Java, set up your work environment.

Many programmers use Integrated Development Environments (IDEs) such as Eclipse and Netbeans for their Java programming, but one can write a Java program and compile it without bloated IDEs.

Java Grammar. Every Java Program is structured into files, and each of these files has a certain structure. For example, if there is a package statement then it is the first line of the file that is not comment or whitespace. Program Synthesis, Neural Code Search, Computer-Aided Education. Understanding programming languages based on their semantics and usage.

Using machine learning and natural language processing techniques to improve developer productivity. Feb 23,  · Ice cream parlour management system Pizza hut - account management system Web Based help desk Honey Pots- A Security System to Identify Black Hat Community in Networks.

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