برای استفاده از متد های زیر چی باید import کنم؟

[daneshjoo91]

توی قطعه کد زیر باید چی رو ایمپورت کنم تا برنامه ران بشه؟

String matn =
"Salam , Man ye file matni daram ke mikham be donbale ye khate " + "khas dar on begardam va bad az peida kardanesh meghdaresh ra taghir bedam . behtarin rah baraye in kar chie? mamnoonam." +
"Salam dooste man yeki az behtarin rah haye on estefade az api java.text ast be in soorat ke " +
"on ra ba ye pattern khas (ya matne khas) find konid va ba hamon mitonid on ra replace konid";
String searchStr = "khate khas";
String replaceStr = "khate Mohem";
Pattern pattern = Pattern.compile(searchStr);
Matcher matcher = pattern.matcher(matn);
boolean found = matcher.find();
if (found)
matn = matcher.replaceFirst(replaceStr);
System.out.println(matn);