我有 2 個具有此類值的字符串：String name = "Scripy";String username = "adil";當(dāng)我用正則表達(dá)式檢查這些字符串時，我得到了false價值：if(name.matches("/[a-zA-Zа-яА-ЯёЁ ]+/")){    System.out.println("Name: true");}else{    System.out.println("Name: false");}if(username.matches("/^[A-Za-z][A-Za-z0-9]*(?:_[A-Za-z0-9]+)*$/")){    System.out.println("Username: true");}else{    System.out.println("Username: false");}結(jié)果：I/System.out: Name: falseI/System.out: Userame: false問題是什么？