java - 正则表达式:删除第二个 "-"之前和之后的所有内容

Question

美好的一天，我有Strings :

 "bus-nr-7b-Station-Yellow-Street",
 "bus-nr-8-Station-Lewis-Street",
 "train-nr-9-Station-Yield-Street",
 "bus-nr-10-Station-Harrow",
 "train-nr-10a-Station-Booki",
 "train-nr-11-Station-Horope",
 "bus-nr-12-Station-Erstin",
 "bus-nr-13-Station-Green-Street",
 "train-nr-13ab-Station-Final-Station",

最后我想:

 "B:7b",
 "B:8",
 "T:9",
 "B:10",
 "T:10a",
 "T:11",
 "B:12",
 "B:13",
 "T:13ab",

所以，我想替换第二个 - 之前的所有内容与 B:或T: ，并删除第三个 - 之后的所有内容。我如何使用正则表达式来实现它？

Answer 1

在您的情况下不使用正则表达式会更快:

String foo = "bus-nr-7b-Station-Yellow-Street";
String[] parts = foo.split("-");
String result = Character.toUpperCase(foo.charAt(0)) + ":" + parts[2];