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This article mainly introduces "what is the data structure in java". In daily operation, I believe many people have doubts about what data structure is in java. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what data structure is there in java?" Next, please follow the editor to study!

Enumeration (Enumeration)

Although the Enumeration interface itself does not belong to data structures, it is widely used in other data structures. The The Enumeration interface defines a way to retrieve contiguous elements from data structures.

Bit set (BitSet)

The bit collection class implements a set of bits or flags that can be set and cleared separately.

This class is very useful when dealing with a set of Boolean values. You only need to assign a "bit" to each value, and then set or clear the bit appropriately to manipulate the Boolean value.

Vector (Vector)

The Vector class is very similar to a traditional array, but the size of the Vector can change dynamically as needed.

Like arrays, the elements of the Vector object are accessible through the index.

The main benefit of using the Vector class is that you don't have to specify the size of the object when you create it, and its size changes dynamically as needed.

Stack (Stack)

Stack implements a last-in, first-out (LIFO) data structure.

You can think of a stack as a vertical stack of objects, and when you add a new element, you put the new element on top of the other elements.

When you take an element from the stack, you take an element from the top of the stack. In other words, the last element in the stack is taken out first.

Dictionary (Dictionary)

The Dictionary class is an abstract class that defines a data structure that maps keys to values.

Dictionary should be used when you want to access data through specific keys rather than integer indexes.

Because the Dictionary class is an abstract class, it only provides a data structure that maps keys to values, not a specific implementation.

Hash table (Hashtable)

The Hashtable class provides a means of organizing data based on a user-defined key structure.

For example, in a hash table of an address list, you can store and sort data by zip code as a key, rather than by person name.

The exact meaning of the hash table key depends entirely on the usage scenario of the hash table and the data it contains.

Attribute (Properties)

Properties inherits from the Hashtable.Properties class to represent a persistent set of properties. Each key in the property list and its corresponding value is a string.

The Properties class is used by many Java classes. For example, when you get an environment variable, it is the return value of the System.getProperties () method.

At this point, the study of "what is the data structure in java" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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