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In Java, a package is a container for a collection of classes, sub-packages, and interfaces. The package keyword is used to create a package in java. Packages are used for the following purposes: Keeping naming conflicts at bay. For example, in two packages, college.staff.cse.Employee and college.staff.ee.Employee, there could be two classes named Employee. Making it easier to […]
June 3, 2022 | Java | No comments
In Java, type casting is a method or process for manually and automatically converting one data type into another. The compiler performs the automatic conversion, while the programmer performs the manual conversion. In this section, we’ll go over typecasting and the various types with examples. Types of Type Casting There are two types of typecasting: […]
April 30, 2022 | Java | No comments
Operator precedence determines the order in which the operators in an expression are evaluated. Associativity rules determine the grouping of operands and operators in an expression with more than one operator of the same precedence. Operators Precedence Associativity postfix increment and decrement ++ — left to right prefix increment and decrement, and unary ++ — […]
April 30, 2022 | Java | No comments
The operators in Java represent the operations, i.e, operators perform operations on the operands. Let us discuss the various operators in Java. Arithmetic Operators: These operators are for basic arithmetic operations They are additions, subtraction, multiplication, division, and remainder. Each of these operators is binary, i.e, it requires two values (operands) to calculate the final […]
April 28, 2022 | Java | No comments
In programming, a constant is an immutable entity. To put it another way, the value cannot be altered. In a program, we often want to give a name to a constant value. For instance, we might have a fixed tax rate of 0.030 for goods and a tax rate of 0.020 for services. These are […]
April 26, 2022 | Java | No comments
Variables represent named storage locations, whose values can be manipulated during the program run. For instance, to store the name of a student and marks of a student during a program run, we require storage locations that are too named so that these can be distinguished easily. Declaration of variables: The declaration of a variable […]
April 21, 2022 | Java | No comments
Data types are means to identify the type of data and associated operations of handling it. Java, like any other language, provides ways and facilities to handle different types of data by providing data types. Java data types are of two types: Primitive (or intrinsic) data types Reference data types Primitive data types come as […]
April 21, 2022 | Java | No comments
Java allows us to have certain non-graphic characters in character constants. (non-graphic characters are those which cannot be typed directly from the keyboard, e.g, backspace, tabs, carriage return, etc.). These characters are represented with the use of an escape sequence, which is represented by a backslash(\) followed by one or more characters. The following table […]
April 21, 2022 | Java | No comments
Literals(often referred to as constants) are data items that are fixed data values. Java allows several kinds of literal: integer-literal floating-literal boolean-literal character-literal string-literal null-literal Integer Literal: Integer Literals are whole numbers without any fractional part. The method of writing integer constants has been specified in the following rule: An integer constant must have at […]
April 21, 2022 | Java | No comments
Identifiers are fundamental building blocks of a program and are used as the general terminology for the names given to different parts of the program viz. variables, objects, classes, functions, arrays, etc. Identifier forming rules of Java state the following: Identifiers can have alphabets, digits, and underscore and dollar sign characters. They must not be […]
April 21, 2022 | Java | No comments