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//创建StringBuilder
StringBuilder sb = new StringBuilder("老八");
System.out.println(sb);//输出
//创建StringBuilder
StringBuilder sb = new StringBuilder("老八");
//添加
sb.append("giao");
sb.append("~");
sb.append("真男人");
sb.append(666);
System.out.println(sb);//输出
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
//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
//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
//Spring 转换 StringBuilder
String lb = "老八";//Spring
//StringBuilder
StringBuilder sbnb = new StringBuilder(lb);
System.out.println(sbnb);//输出
//创建StringBuilder
StringBuilder sb = new StringBuilder("长度");
System.out.println(sb.length());//输出长度
//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
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