java中insert函数

insert() 函数表示在字符串中插入字符串

StringBuffer insert(int index,String str)

import java.lang.*;public class insertdemo {public static void main(String[] args) {// TODO Auto-generated method stub        StringBuffer s=new StringBuffer("kbjkabjkvbk");        s.insert(3,"abc");        System.out.println(s);}}