k-means的java实现

代码说明：

应用背景Implement k-means clustering on a training data set  to predict classification values of a test data set.关键技术The experiment intended to classify test data values using the data   mining strategy known as k-means clustering.   The 6 variables in the training data are used to plot the data and   centroids are placed to locate clumps of the 255, classified training   data. Once located, a classification value can be assigned to the 100,   test data.