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The Basic GUI Application 2008-06-08 10:52:41 There are two basic types of GUI program in Java: stand-alone applications and applets. An applet is a program that runs in a rectangular area on a Web page. Applets are generally small programs, meant to do fairly simple things, although there is nothing to stop them from being very complex. Applets were responsible for a lot of the initial excitement about Java when it was introduced, since t Read more:Application
, Basic
The Basic GUI Application 2008-06-08 10:52:35 There are two basic types of GUI program in Java: stand-alone applications and applets. An applet is a program that runs in a rectangular area on a Web page. Applets are generally small programs, meant to do fairly simple things, although there is nothing to stop them from being very complex. Applets were responsible for a lot of the initial excitement about Java when it was introduced, since t Read more:Application
, Basic
The Basic GUI Application 2008-06-08 10:52:23 There are two basic types of GUI program in Java: stand-alone applications and applets. An applet is a program that runs in a rectangular area on a Web page. Applets are generally small programs, meant to do fairly simple things, although there is nothing to stop them from being very complex. Applets were responsible for a lot of the initial excitement about Java when it was introduced, since t Read more:Application
, Basic
The Basic GUI Application 2008-06-08 10:51:42 There are two basic types of GUI program in Java: stand-alone applications and applets. An applet is a program that runs in a rectangular area on a Web page. Applets are generally small programs, meant to do fairly simple things, although there is nothing to stop them from being very complex. Applets were responsible for a lot of the initial excitement about Java when it was introduced, since t Read more:Application
, Basic
Programming With Arrays 2008-06-08 10:51:32 Arrays are the most basic and the most important type of data structure, and techniques for processing arrays are among the most important programming techniques you can learn. Two fundamental array processing techniques -- searching and sorting -- will be covered in Section 7.4. This section introduces some of the basic ideas of array processing in general. 7.2.1 Arrays and for Loops Read more:Programming
The Basic GUI Application 2008-06-08 10:51:23 There are two basic types of GUI program in Java: stand-alone applications and applets. An applet is a program that runs in a rectangular area on a Web page. Applets are generally small programs, meant to do fairly simple things, although there is nothing to stop them from being very complex. Applets were responsible for a lot of the initial excitement about Java when it was introduced, since t Read more:Application
, Basic
Introduction to Correctness and Robustness 2008-06-08 10:35:28 A program is correct if it accomplishes the task that it was designed to perform. It is robust if it can handle illegal inputs and other unexpected situations in a reasonable way. For example, consider a program that is designed to read some numbers from the user and then print the same numbers in sorted order. The program is correct if it works for any set of input numbers. It is robust if it c Read more:Introduction
A Brief Introduction to XML 2008-06-08 10:34:25 When data is saved to a file or transmitted over a network, it must be represented in some way that will allow the same data to be rebuilt later, when the file is read or the transmission is received. We have seen that there are good reasons to prefer textual, character-based representations in many cases, but there are many ways to represent a given collection of data as text. In this section, Read more:Brief
, Introduction
, XML
The for Statement 2008-06-08 10:29:48
We turn in this section to another type of loop, the for statement. Any for loop is equivalent to some while loop, so the language doesn't get any additional power by having for statements. But for a certain type of problem, a for loop can be easier to construct and easier to read than the corresponding while loop. It's quite possible that in real programs, for loops actually outnumber while loo
Algorithm Development 2008-06-08 10:25:13 Programming is difficult (like many activities that are useful and worthwhile -- and like most of those activities, it can also be rewarding and a lot of fun). When you write a program, you have to tell the computer every small detail of what to do. And you have to get everything exactly right, since the computer will blindly follow your program exactly as written. How, then, do people write any Read more:Development
The while and do..while Statements 2008-06-08 10:23:10 Statements in Java can be either simple statements or compound statements. Simple statements, such as assignment statements and subroutine call statements, are the basic building blocks of a program. Compound statements, such as while loops and if statements, are used to organize simple statements into complex structures, which are called control structures because they control the order in which
The Basic If Statement 2008-06-08 10:15:10 An if statement tells the computer to take one of two alternative courses of action, depending on whether the value of a given boolean-valued expression is true or false. It is an example of a "branching" or "decision" statement. An if statement has the form: if ( boolean-expression ) statementelse statement When the computer executes an if statement, it evaluates the boolean expression. If Read more:Basic
The Basic While Loop 2008-06-08 10:14:22 The block statement by itself really doesn't affect the flow of control in a program. The five remaining control structures do. They can be divided into two classes: loop statements and branching statements. You really just need one control structure from each category in order to have a completely general-purpose programming language. More than that is just convenience. In this section, I'll intr Read more:Basic
Blocks 2008-06-08 10:13:50 The block is the simplest type of structured statement. Its purpose is simply to group a sequence of statements into a single statement. The format of a block is: { statements} That is, it consists of a sequence of statements enclosed between a pair of braces, "{" and "}". (In fact, it is possible for a block to contain no statements at all; such a block is called an empty block, and can ac Read more:Blocks
Blocks, Loops, and Branches 2008-06-08 10:11:39 The ability of a computer to perform complex tasks is built on just a few ways of combining simple commands into control structures. In Java, there are just six such structures that are used to determine the normal flow of control in a program -- and, in fact, just three of them would be enough to write programs to perform any task. The six control structures are: the block, the while loop, the do Read more:Blocks
, Loops
The Java Virtual Machine 2008-06-08 10:03:37 Machine
language consists of very simple instructions that can be executed directly by the CPU of a computer. Almost all programs, though, are written in high-level programming languages such as Java, Pascal, or C++. A program written in a high-level language cannot be run directly on any computer. First, it has to be translated into machine language. This translation can be done by a program ca Read more:Virtual Machine
Variables in Programs 2008-06-08 09:58:46 A variable can be used in a program only if it has first been declared. A variable declaration statement is used to declare one or more variables and to give them names. When the computer executes a variable declaration, it sets aside memory for the variable and associates the variable's name with that memory. A simple variable declaration takes the form: type-name variable-name-or-names; Read more:Programs
Types and Literals 2008-06-08 09:58:27 A variable in Java is designed to hold only one particular type of data; it can legally hold that type of data and no other. The compiler will consider it to be a syntax error if you try to violate this rule. We say that Java is a strongly typed language because it enforces this rule. There are eight so-called primitive types built into Java. The primitive types are named byte, short, int, long,
Variables 2008-06-08 09:58:12 Programs manipulate data that are stored in memory. In machine language, data can only be referred to by giving the numerical address of the location in memory where it is stored. In a high-level language such as Java, names are used instead of numbers to refer to data. It is the job of the computer to keep track of where in memory the data is actually stored; the programmer only has to remember t
Variables and the Primitive Types 2008-06-08 09:57:40 Variables and the Primitive
Types Names are fundamental to programming. In programs, names are used to refer to many different sorts of things. In order to use those things, a programmer must understand the rules for giving names to things and the rules for using the names to work with those things. That is, the programmer must understand the syntax and the semantics of names. According to the s
Introduction to Enums 2008-06-08 09:55:14 Introduction to EnumsJava comes with eight built-in primitive types and a large set of types that are defined by classes, such as String. But even this large collection of types is not sufficient to cover all the possible situations that a programmer might have to deal with. So, an essential part of Java, just like almost any other programming language, is the ability to create new types. For t Read more:Introduction
Operations on Strings 2008-06-08 09:54:51 A value of type String is an object. That object contains data, namely the sequence of characters that make up the string. It also contains subroutines. All of these subroutines are in fact functions. For example, every string object contains a function named length that computes the number of characters in that string. Suppose that advice is a variable that refers to a String. For example, advic
Built-in Subroutines and Functions 2008-06-08 09:54:25 Built-in Subroutines and Functions
Recall that a subroutine is a set of program instructions that have been chunked together and given a name. You can get a lot done in a program just by calling subroutines that have already been written for you. In Java, every subroutine is contained in a class or in an object. Some classes that are standard parts of the Java language contain predefined subroutine Read more:Built
Strings, Objects, Enums, and Subroutines 2008-06-08 09:52:48 There is a fundamental difference between the primitive types and the String type: Values of type String are objects. It will be useful for you to know a little about them and about a closely related topic: classes. This is not just because strings are useful but because objects and classes are essential to understanding another important programming concept, subroutines. Another reason for cons
The Basic Java Application 2008-06-08 09:49:31 The Basic
Java Application
A program is a sequence of instructions that a computer can execute to perform some task. A simple enough idea, but for the computer to make any use of the instructions, they must be written in a form that the computer can use. This means that programs have to be written in programming languages. Programming languages differ from ordinary human languages in being complet Read more:Java Application
Sensex trading over 320 points down early afternoon 2008-07-06 13:12:56 Thu, Jun 19 01:14 PMMumbai, June 19 (IANS) Indian equity markets extended their loss in early afternoon trade Thursday. Banking, realty and capital goods stocks were the worst hit.At 1:00 p.m., the 30-share benchmark index of the Bombay Stock Exchange (BSE), the Sensex, was at 15,101.40, down 320.91 points or 2.08 percent from its closing figure Wednesday. At the day's low it had touched 15,075.14
Future scope of Java programming by Navi arora 2008-07-20 03:38:40 Before Java I was a Smalltalk guy. I remember switching from one language to the other and the tipping point that you reach when you’ve mastered the new language and how many months it takes, not to mention the years, to do really good design and know-how, which patterns to apply and how to avoid mistakes, understand performance issues, and so forth. I recently had to look at some Smalltalk code Read more:Future
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