Parameterization in java

Parameterization in Java refers to the ability to define classes, interfaces, and methods with type parameters, allowing them to operate on different types without specifying the actual type until the code is used. It enables you to create reusable and type-safe code by parameterizing types and algorithms.

Explanation

1. Type Parameters

Its involves declaring one or more type parameters within angle brackets (<>) when defining a class, interface, or method. These type parameters act as placeholders for actual types that are provided when using the parameterized type.

2. Generic Programming

The facilitates generic programming, where algorithms and data structures can be defined to work with any data type. This promotes code reuse and increases the flexibility and versatility of codebases.

3. Type Safety

Parameterization provides type safety by ensuring that type constraints are enforced at compile time. This prevents type-related errors and improves the robustness and reliability of Java programs.

java
import java.util.ArrayList;
import java.util.List;

public class ParameterizationExample {
    public static void main(String[] args) {
        // Parameterized type: List<String>
        List<String> stringList = new ArrayList<>();

        // Add elements to the List
        stringList.add("Java");
        stringList.add("Python");
        stringList.add("C++");

        // Iterate over the List and print each element
        for (String str : stringList) {
            System.out.println(str);
        }
    }
}

In this example, List is a parameterized type where String is the type parameter. The List interface is parameterized with the type String, specifying that the list can only contain strings. This allows the stringList variable to hold a list of strings, and the compiler ensures that only string elements are added to the list. Parameterization enhances type safety and enables the creation of reusable code that can work with different types.

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