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In this article, we will learn about what is Type Casting in Java, along with examples and various types of Type Casting in Java. We will get to know about the widening and narrowing type casting in java and also about upcasting and downcasting. In the end, we will discuss the advantages and importance of Type Casting in Java.<\/p>\n
The varied aspects of the Java programming language is effectively handled by a wide variety of data types. Unfortunately, we have to convert one data type into another one more frequently. The concept of Type Casting is used in this situation.<\/p>\n
Java has a feature called type casting that allows the form or type of a variable or object to be cast into a different kind of object. The process of converting one data type to another is known as type casting. Let\u2019s first discuss Java data types before moving on to typecasting.<\/p>\n
Java is a statically-typed language which means that all the variables must be declared before using them. So, It is compulsory to declare the variable\u2019s type, and also the names must be specified.
\nData Types in Java are broadly divided into two major categories:<\/p>\n
Primitive Data Types are the most basic data types available in Java. There are 8 different primitive data types available in Java. These are Example:<\/strong><\/p>\n Byte:<\/strong> Example:<\/strong><\/p>\n Char:<\/strong> Example:<\/strong><\/p>\n Int:<\/strong> Example:<\/strong><\/p>\n Short:<\/strong> Example:<\/strong><\/p>\n Long:<\/strong> Example:<\/strong><\/p>\n Float:<\/strong> Example:<\/strong><\/p>\n Double:<\/strong> Example:<\/strong><\/p>\n Instances or objects are referred to as either non-primitive data types or reference data types. They are unable to directly store a variable’s value in memory. They save the variable’s memory address. Non-primitive data types are created by the user, in contrast to primitive data types, which are defined by Java. They were made by programmers, and null can be used to assign them. Non-primitive data types have equal sizes.<\/p>\n Various Non-Primitive Data Types available in Java are<\/strong><\/p>\n Type Casting in Java is majorly divided into the following two categories i.e. Widening Type Casting in Java and Narrowing Type Casting. These are explained below in detail:<\/p>\n Widening Typecasting is the process of converting a lower data type to a higher data type. This style of casting is also referred to as automated typecasting because Java automatically accomplishes it without any explicit code writing.<\/p>\n Two data types need to be compatible with one another to execute this conversion. In widening type casting, 19 different types of primitive conversion are possible:<\/p>\n Conversion of byte to short, byte to int, byte to long, byte to float, byte to double<\/strong><\/p>\n Conversion of short to int, short to long, short to float, short to double<\/strong><\/p>\n Conversion of char to int, char to long, char to float, char to double<\/strong><\/p>\n Conversion of int to long, int to float, int to double<\/strong><\/p>\n Conversion of long to float, long to double<\/strong><\/p>\n Conversion of float to double<\/strong><\/p>\n Code Implementation of Widening Type Casting in Java:<\/strong>
\nBoolean:<\/strong>
\nIt stores only two types of Values which are true and false.<\/p>\nboolean flag = true;<\/code><\/pre>\n
\nByte Data Type is used to store values from -128 to 127. The default value of Byte is 0.<\/p>\nbyte b = 67;<\/code><\/pre>\n
\nIt is used to store Characters in Java.<\/p>\nchar ch = 'a';<\/code><\/pre>\n
\nInteger data is a 32-bit Data Type used to store numbers. It is the default data type used for storing numbers until there is a big number that might overflow.<\/p>\nint num = 76768;<\/code><\/pre>\n
\nShort Data Type is half the size of the int Data Type. In java, it is of 16- bit.<\/p>\nshort val = 67;<\/code><\/pre>\n
\nIt is used for storing 64-bit data in memory.<\/p>\nlong value = 895950;<\/code><\/pre>\n
\nA single-precision 32-bit IEEE 754 floating point is the float data type. It has an infinite value range. The default setting is 0.0F.<\/p>\nfloat decimal = 67.57f;<\/code><\/pre>\n
\nA double-precision 64-bit IEEE 754 floating point is the double data type. It has an infinite value range. Like float, the double data type is frequently used for decimal values. The default setting is 0.0d.<\/p>\ndouble d = 56564.7;<\/code><\/pre>\nNon-Primitive Data Types in Java<\/h3>\n
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Types of Typecasting in Java<\/h2>\n
Widening Type Casting in Java with Primitive Data Types<\/h3>\n
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byte bi = 2;\nshort s = bi;\nint i = bi;\nlong 1 = bi;\nfloat f = bi;\ndouble d = bi;<\/code><\/pre>\n<\/li>\nshort sh = 3;\nint i = sh;\nlong 1 = sh;\nfloat f = sh;\ndouble d = sh;<\/code><\/pre>\n<\/li>\nchar ch = 'g';\nint i = ch;\nlong l = ch;\nfloat f = ch;\ndouble d = ch;<\/code><\/pre>\n<\/li>\nint val = 32 ;\nlong l = val;\nfloat f = val;\ndouble d = val;<\/code><\/pre>\n<\/li>\nlong val = 8878;\nfloat f = val;\ndouble d = val;<\/code><\/pre>\n<\/li>\nfloat dec = 23.45f ;\ndouble d = dec;<\/code><\/pre>\n<\/li>\n<\/ul>\n
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