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One example of the SOLID principles in Java is the Single Responsibility Principle (SRP). It states that a class should have only one reason to change, meaning it should only have one responsibility or function.

For instance, consider a Report class. If this class handles generating the report and also saving it to a file, it violates SRP. Changes to the file-saving logic could unexpectedly affect the report generation.

To follow SRP, split responsibilities into separate classes:

class Report {
    public String generateReport() {
        return "Report Content";
    }
}

class ReportSaver {
    public void saveToFile(String report, String filename) {
        // Logic to save report to a file
    }
}

Now, changes to saving logic don’t affect report generation. This makes the code easier to maintain and extend, adhering to good software design practices.