分析两个字符串，分别输出每个字符串的单词并统计出单词个数。阅读程序，填写空行。 注意：不改动程序结构，不得增行或删行。 import java.util.*; public class ex2 { public static void main(String args[]) {String s1="I am Chinese,she is my girlfriend";String s2="Oh,really,fine";StringTokenizer fenxi_1=new StringTokenizer(s1,",");StringTokenizer fenxi_2=new StringTokenizer(s2,",");int n1=fenxi_1.countTokens();int n2=fenxi_2.countTokens();while(fenxi_1.hasMoreTokens()){ String s=fenxi_1.nextToken(); System.out.println(s);}System.out.println("s1单词："+n1+"个");while(fenxi_1.hasMoreTokens()){ String s=______; System.out.println(s);}System.out.println("s2单词："+n2+"个"); } }
