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StringBuilder与String互相转换_stringbuilder转string

stringbuilder转string

StringBuilder转String:

StringBuilder sb = new StringBuilder();
sb.append("hello");
String s = sb.toString();
System.out.println(s);

String转StringBuilder:

String s = "hello";
StringBuilder sb = new StringBuilder(s);
System.out.println(sb);

使用Stringbuilder进行拼接:

StringBuilder sb = new StringBuilder();
sb.append("hello");
sb.append("bb");
String s = sb.toString();
System.out.println(s);

输出hellobb,append可以嵌套使用:sb.append("hello").append("bb")

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