是一个用JAVA语言写的应用程序，用来分析微阵列（microarray）实验获得的基因表达数据。需要下载安装JAVA运行环境JRE1.2后(5.1M)后，才能运行.

JJ-Express Pro is a comprehensive portable software package for analysis and visualization of microarray data. The software gives access to methods for unsupervised analysis (clustering etc.), supervised analysis (SAM, Feature Subset Selection, etc.) and visualisation in an integrated and flexible way. Its efficiency allows interactive clustering of thousands of expression profiles on standard personal computers. Supervised analysis can be performed on samples by simple user-guided sample annotation or on genes through tools for metabolic pathway analysis and Gene Ontology mapping. See the J-Express Pro Screenshots Document for more examples.

J-Express Pro is compatible with data from most microarray data systems, including GenePix, Affymetrix, Agilent, Scanalyze and Array Express and it contains a flexible interface to manually build file readers from other sources. Traditional tabular formatted files (e.g MS Excel) are easily imported into J-Express. In addition, java is programmed in Java which means that it can run on most operating systems, including windows, linux, MAC and unix.