public class test { public static void main(String[] args){ String str = ""; System.out.println(str.length()); System.out.println(str.split(",").length); System.out.println(str.split(",")[0]);
System.out.println(“Over！”); } }
输出为：
0
1
Over！
“”.length()与“”.split(",").length
原文：https://www.cnblogs.com/jixiegongdi/p/10703432.html