Why is it important to release resources after their use in a program?

Releasing resources after their use is important to prevent memory leaks and other resource issues, which enhances the stability and performance of a program. In Java, despite the presence of garbage collection, some resources, such as files, network connections, or streams, require explicit closing.

If such resources are not released, the program may exhaust their limits, leading to errors and crashes. This is done using try-with-resources constructs or by explicitly calling the close() method.

Example with try-with-resources:

try (BufferedReader reader = new BufferedReader(new FileReader("file.txt"))) {
    String line = reader.readLine();
    System.out.println(line);
} catch (IOException e) {
    e.printStackTrace();
}

In this example, the reader resource is automatically closed after use, preventing leaks.