Here are explanations of the future perfect and future perfect continuous tenses with examples, and the difference between them:

Future Perfect:

• Used to express an action that will be completed by a certain time in the future
• Formed with "will have" + past participle Examples:
• By the time class ends, I will have finished my homework.
• By next year, she will have lived in this city for 10 years.

Future Perfect Continuous:

• Used to express an action that will continue up until a point in the future
• Formed with "will have been" + present participle (-ing form of the verb) Examples:
• By the end of this month, I will have been working on this project for 3 years.
• When he turns 25, he will have been practicing piano for 15 years.

The difference:

• Future perfect refers to the completion of an action in the future
• Future perfect continuous emphasizes the duration of an action up until a point in the future