代码详解: from sklearn.datasets import load_iris from sklearn.model_selection import train_test_split from sklearn.preprocessing import StandardScaler from sklearn.neighbors import KNeighborsClassifier import matplotlib.pyplot as plt from pylab import mp
问题描述: 首先,看一个小的测试程序: public static void main(String[] args) { testStringBuffer test = new testStringBuffer(); StringBuffer stringBufferA = new StringBuffer("A"); StringBuffer stringBufferB = new StringBuffer("B"); StringBuffer stringBuf