Java Type Casting
Narrowing Casting (manually) - larger type to a smaller size type
double -> float -> long -> int -> char -> short -> byteJava Type Casting
Narrowing Casting (manually) - larger type to a smaller size type
double -> float -> long -> int -> char -> short -> bytetypecasting java
Assigning a value of one type to a variable of another type is
known as Type Casting.
Auto-boxing; is a process when you take a primitive value and
assign into wrapper class object.
Un-boxing; is a process when you take Wrapper class object
and convert to primitive.java type casting
// You can typecast to convert a variable of one data type to another.
// Wide Casting converts small data types to larger ones.
// Narrow Casting converts large data types to smaller ones.
// Java can automatically Wide Cast.
// Java will throw an error when trying to automatically Narrow Cast.
// This is because data is often lost when Narrow Casting.
// Narrow Casting must be done manually.
//Wide Cast:
int SomeNumber = 5;
double WideCastedNumber = (double)SomeNumber;
//Narrow Cast:
double SomeNumber = 5.39;
int NarrowCastedNumber = (int)SomeNumber;
//Note: The data that holds the decimal places will be lost!cast java
JAVA: Example of cast:
int SomeNumber = 5; //int
double WideCastedNumber = (double)SomeNumber; //from int to double
double myDouble = 9.78;
int myInt = (int) myDouble; // from double to intcasting in java
Primitive Type casting and Reference Type casting
PRIMITIVE CASTING:
implicit casting (casting smaller type to larger
int a = 100; double c = a;)
explicit casting (casting larger to smaller
byte b = (byte) a;
REFERENCE CASTING:
upcasting - implicitly done (casting smaller type to larger)
Collection<Integer> collection = new ArrayList<>();
downcasting (cast larger type to smaller one )
List <Integer> list = ( ArrayList ) collection;
FRAMEWORK EXAMPLE:
Up Casting, Down Casting in Multi Browser testing.
WebDriver, Chrome Driver, Firefox Driver object
I casted to WebDriver to making reference type.
Whenever you taking Screenshots,
whenever executing Java script command.java casting method
Animal animal = new Dog ();
animal.fetch(); // Compiler error
(Dog) animal.fetch();Copyright © 2021 Codeinu
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