What is the purpose and application of the pattern matching mechanism?

Pattern matching allows checking data structures and extracting values from them, simplifying code and increasing readability.

In Java, pattern matching is used, for example, in the switch statement with support for types and conditions, which allows writing more expressive and safer code.

Applications:

• Simplifying branching based on object types.
• Extracting data from complex structures without explicit casts.
• Improving code readability and maintainability.

Example in Java (starting from the version supporting pattern matching):

Object obj = "Example";
switch (obj) {
    case String s -> System.out.println("String length " + s.length());
    case Integer i -> System.out.println("Integer: " + i);
    default -> System.out.println("Other type");
}

Here, switch automatically checks the type and assigns the value to the variable, eliminating the need for explicit checks and casts.