链式编程写法
//创建StringBuilder StringBuilder sb = new StringBuilder("老八"); //添加 sb.append("giao").append("~").append(666).append("真男人"); System.out.println(sb);//输出 反转字符串 //创建StringBuilder StringBuilder sb = new StringBuilder("老八"); //添加 sb.append("giao").append("~").append(666).append("真男人"); System.out.println(sb);//输出 //反转字符串 sb.reverse(); System.out.println(sb);//输出反转后的字符串 StringBuilder 转换 String toString(); //创建StringBuilder StringBuilder sb = new StringBuilder("老八"); //添加 sb.append("giao").append("~").append(666).append("真男人"); //StringBuilder 转换 String String xs = sb.toString(); System.out.println(xs);//输出 String 转换 StringBuilder //Spring 转换 StringBuilder String lb = "老八";//Spring //StringBuilder StringBuilder sbnb = new StringBuilder(lb); System.out.println(sbnb);//输出 或者用添加方法也可以 长度 length() //创建StringBuilder StringBuilder sb = new StringBuilder("长度"); System.out.println(sb.length());//输出长度 截取 区间截取不包括参数二中的值,包含参数一中的值 //创建StringBuilder StringBuilder sb = new StringBuilder("老八"); //添加 sb.append("giao").append("~").append(666).append("真男人"); System.out.println(sb);//输出 //截取 String substring = sb.substring(1, 5); System.out.println(substring);//输出StringBuilder类帮助文档 点击➡查看