1. Write a Java program to demonstrate the use of an interface

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2. Create a Java program to demonstrate a class implementing multiple interfaces

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3. Write a Java program to demonstrate the concept of interface inheritance

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4. Create a Java program to demonstrate a class implementing an interface with default methods

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5. Write a Java program to demonstrate the use of static methods in interfaces

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6. Write a Java program to demonstrate the use of interfaces with multiple implementations

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7. Write a Java program to demonstrate the use of interfaces for achieving multiple inheritance

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8. Create a Java program to demonstrate the concept of interfaces with static methods and default methods

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9. Write a Java program to demonstrate interface implementation with anonymous classes

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10. Create a Java program to demonstrate the use of nested interfaces

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11. Write a Java program to demonstrate interface inheritance with a conflicting default method

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12. Create a Java program to demonstrate interface implementation with lambda expressions

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13. Create a Java program to demonstrate the use of an interface to implement a simple callback mechanism

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14. Write a Java program to demonstrate the concept of an interface with private methods

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15. Create a Java program to demonstrate the use of a functional interface with a single abstract method

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16. Write a Java program to demonstrate interface implementation in a class hierarchy

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17. Write a Java program to demonstrate the use of an interface with a static factory method

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18. Create a Java program to demonstrate the use of an interface for a custom exception

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19. Write a Java program to demonstrate the use of a functional interface with lambdas and method references

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20. Create a Java program to demonstrate the use of interfaces with generics

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21. Write a Java program to demonstrate the use of an interface with a default method for logging

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22. Create a Java program to demonstrate the use of an interface with a private static method

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23. Write a Java program to demonstrate the use of an interface for sorting a list of objects

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24. Create a Java program to demonstrate the use of an interface for filtering with lambdas

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25. Write a Java program to demonstrate the use of an interface with default methods for string manipulation

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26. Create a Java program to demonstrate the use of an interface with private methods for validation

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27. Create a Java program to demonstrate the use of an interface for custom function

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28. Create a Java program to demonstrate the use of an interface for custom array manipulation

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29. Write a Java program to demonstrate the use of an interface for custom time measurement

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30. Create a Java program to demonstrate the use of an interface for custom encryption

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31. Write a Java program to demonstrate the use of an interface for custom decryption

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32. Write a Java program to demonstrate the use of an interface for custom message formatting

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33. Create a Java program to demonstrate the use of an interface for custom authentication

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34. Write a Java program to demonstrate the use of an interface for custom date and time manipulation

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35. Create a Java program to demonstrate the use of an interface for custom document printing

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36. Create a Java program to demonstrate the use of an interface for custom currency conversion

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37. Create a Java program to demonstrate the use of an interface for custom weather information retrieval

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38. Write a Java program to demonstrate the use of an interface for custom temperature conversion

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