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a `deque` (double-ended queue) in java is a part of the java collections framework and provides a way to store elements in a linear order. it allows you to add, remove, and access elements from both ends (head and tail) efficiently. the `deque` interface is implemented by several classes, including `arraydeque` and `linkedlist`.

removing elements from a deque

you can remove elements from a `deque` in several ways:

1. **remove from the head (front) of the deque**: you can use the `removefirst()` or `pollfirst()` methods.
2. **remove from the tail (end) of the deque**: you can use the `removelast()` or `polllast()` methods.
3. **remove a specific element**: you can use the `remove(object o)` method.

example code

here’s a simple example demonstrating how to use the `deque` interface to add and remove elements:



explanation of the code

1. **creating a deque**: we create an instance of `arraydeque`, which is a commonly used implementation of the `deque` interface.
2. **adding elements**: we use the `add()` method to add elements to the deque.
3. **removing elements**:
**removing from the front**: we use `removefirst()` to remove the element from the front of the deque.
**removing from the end**: we use `removelast()` to remove the element from the end of the deque.
**removing a specific element**: we use `remove(object o)` to remove a specific element from the deque.
4. **checking removal**: the `remove()` method returns a boolean indicating whether the element was successfully removed.

output

when you run the above code, you can expect output similar to the following:



conclusion

the `deque` interface in java is a flexible data structure that allows for efficient addition and removal of elements from both ends. the provided example illustrates how to create a `deque`, add elements, and remove them in various ways. you can choose different implementations of the `deque` interface based on your specific needs regarding performance and memo ...

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