Java Type Casting

Hello guys and welcome to Code2Night! In this article, we will delve into the fascinating world of Java Type Casting. Type casting plays a crucial role in programming as it allows us to convert one data type into another, facilitating compatibility and enabling us to manipulate and utilize our data effectively. Whether you're a beginner seeking a solid foundation in Java or an experienced developer looking to improve your skills, this article will provide you with a comprehensive understanding of typecasting in Java and its practical applications. So, let's dive in and explore the intricacies of Java Type Casting together!

Type casting is when you assign a value of one primitive data type to another type.

In Java, there are two types of casting:

• Widening Casting (automatically) - converting a smaller type to a larger type size
  byte -> short -> char -> int -> long -> float -> double
  
  
• Narrowing Casting (manually) - converting a larger type to a smaller size type
  double -> float -> long -> int -> char -> short -> byte

 public class Main {
  public static void main(String[] args) {
    int myInt = 9;
    double myDouble = myInt; // Automatic casting: int to double

    System.out.println(myInt);      // Outputs 9
    System.out.println(myDouble);   // Outputs 9.0
  }
}

Narrowing Casting

Narrowing casting must be done manually by placing the type in parentheses in front of the value:

public class Main {
  public static void main(String[] args) {
    double myDouble = 9.78d;
    int myInt = (int) myDouble; // Manual casting: double to int

    System.out.println(myDouble);   // Outputs 9.78
    System.out.println(myInt);      // Outputs 9
  }
}