A constructor is a special method for initializing a new instance of a class.
The constructor method for a class will have the same name as the class.
Constructor Example
This example shows a class and a constructor named Circle:
public class Circle {
public int x = 0;
public int y = 0;
public int radius = 0;
public Circle(int x, int y, int radius) {
this.x = x;
this.y = y;
this.radius = radius;
}
}
A class may have multiple constructors. In this case, each constructo
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COBOL is a third generation programming language (3GL), is also one of the oldest programming languages that is still in use today. COBOL is an acronym that stands for Common Business-Oriented Language. Its primary use is in the fields of business, finance, and administrative systems for various companies and governments. It also is responsible for some of the back end computing behind online financial transaction and payroll services.
The idea, COBOL, was formulated by the Short Range Commit
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Merging means combining elements of two arrays to form a new array. The simplest way of merging two arrays is to first copy all the elements of one array into a new array and then append all the elements of the second array to the new array. If you want the resultant array to be sorted, you can sort it by any of the sorting techniques.
If the arrays are originally in sorted order, they can be merged in such a way as to ensure that the combined array is also sorted. This technique is known as
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A library is a collection of programs and functions which can be used by other programs. Like all other high-level languages, C++ provides function libraries containing built-In functions. These standard functions are extremely useful to the programmers. The advantages of library functions are listed below:
Reusability of code : The program development activity requires three major activities: coding, testing and debugging. If a function is developed previously, then it is available as a
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A Java Virtual Machine is quite simply a piece of software that enables Java technology to be recognized and successfully executed on a vast array of hardware platforms. Java virtual machines are so named because they provide a necessary environment for the Java bytecode to be executed. The flexibility of a JVM allows a Java applet to be written only once, but able to be run on virtually any operating system.
Java virtual machines accept standardized binary format code. Java compilers transla
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Exceptions are of two kinds, namely, synchronous exceptions and asynchronous exceptions. Errors such as "out-of-range index" and "over-flow" belong to the synchronous type exceptions. The errors that are caused by events beyond the control of the program (such as keyboard interrupts) are called asynchronous exceptions. The proposed exception handling mechanism in C++ is designed to handle only synchronous exceptions.
The purpose of the exception handling mechanism is to prov
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In this method, a function fn() is applied to each key. The result of this function determines into which of the several sub-files the record is to be placed. The function should have the property that x <= y, fn (x) <= fn (y). Such a function is called order preserving. Thus all of the records in one sub-file will have keys that are less than or equal to the keys of the records in another sub-file. An item is placed into a sub-file in correct sequence by using any sorting method; simple i
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Sorting is the process of arranging elements in some logical order.
Sorting methods are classified into the following categories:
External sorting: This deals with sorting of data stored in external files. This method is used when the volume of data is very large and cannot be held in a computer's RAM.
Internal sorting: This deals with sorting of data held in the RAM of a computer.
Sorting Methods
The following are links to tutorials on some of the most popular sorting methods:
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PHP programmers commonly encounter the “Cannot Modify Header Information” error, which is normally displayed when extraneous white space is included in a PHP header file. When a programmer who is new to PHP encounters this error, he/she may become frustrated when trying to determine the problem's source since the header portion of the programming that he/she has just completed normally generates it. The error can be displayed while working in any PHP-related content management system (CMS) o
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The former method discussed is quite inefficient. Let us see if a more efficient method to compute path can be produced. Let us define the matrix path k such that path k [i][j] is true if and only if there is a path from node i to node j that does not pass through any nodes numbered higher than k (except, possibly, for i and j themselves). How can the value of path k+ J [i][j] be obtained from path k? Clearly for any i and j such that path k [i][j] = true, path k+I [i][j] must be true (why?). Th
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