TopicModel4J: A Java Package for Topic Models (Contain LDA, Collapsed Variational Bayesian Inference for LDA, author-topic model, BTM, dirichlet multinomial mixture model, DPMM, Dual Sparse Topic Model, GaussianLDA, Hierarchical Dirichlet processes, Labeled LDA, Link LDA, Pseudo-document-based Topic Model, Sentence LDA and so on)