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How to make javalibrary by category?
In java, the library is an institution that collects, sorts out and collects books and materials for people to read and refer to. As early as 3000 BC, libraries appeared, which have the functions of preserving human cultural heritage, developing information resources and participating in social education.

According to the library in the dictionary, the word "library" first appeared in Japanese literature in 1877. However, it first appeared in China literature. When an article about building a simple library in the 62nd issue of Education World was pushed, it was 1894.

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A library is a library. The Library in Java can be abbreviated as lib, which literally means the class library run by Java.

Literature collection is the foundation of the whole library work. Librarians should first make clear the collection principle, collection scope, collection focus and selection criteria of the library, and understand the collection situation of the library, the types and reproduction quantity of documents, the utilization rate and service life of various books, which books can be eliminated (see the elimination of books and periodicals) and which books and periodicals should be replenished. , but also need to master the publishing dynamics. Then replenish the collection by buying, exchanging and copying.