Type casting in Java
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If you're looking to master Java programming, you're in the right place. In this video, we're diving into one of the fundamental concepts of Java – type casting.
Implicit and Explicit Type Casting in Java
Type casting in Java is the process of converting a variable from one data type to another. This can happen either implicitly or explicitly.
Implicit Type Casting (Widening Conversion)
Implicit type casting, also known as widening conversion, occurs automatically when a smaller data type is assigned to a larger data type. This type of casting does not lead to data loss and is done automatically by the Java compiler.
Explicit Type Casting (Narrowing Conversion)
Explicit type casting, also known as narrowing conversion, is required when we are converting a larger data type to a smaller data type. This type of casting can lead to data loss and must be explicitly done by the programmer using the cast operator.
Type Promotion in Java
Type promotion in Java occurs when operations are performed between two different data types. In such cases, Java automatically promotes the smaller data type to the larger data type to avoid data loss and maintain precision.
Summary
Implicit Casting (Widening Conversion):
1. Automatically performed by the compiler.
2. No data loss.
3. Converts a smaller type to a larger type (e.g., int to long).
Explicit Casting (Narrowing Conversion):
1. Must be explicitly done by the programmer.
2. Potential for data loss.
3. Converts a larger type to a smaller type (e.g., double to int).
Type Promotion:
1. Happens automatically in expressions involving mixed data types.
2. Promotes smaller types to larger types to prevent data loss and maintain precision during operations.
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