utf 8 - Add support to UTF-8 chars without writing all class code from 0? [Bukkit and Java] -

i have 3 class handle configs. (2000 lines in 2 class)

and want add support utf-8 chars without writing code 0 ;/

i show smallest class (is not finished , don't want spam 1400 lines :)) have actual 2 variables:

package com.gmail.bukkitsmerf.professionalwarns;  import java.io.file; import java.io.filewriter; import java.io.ioexception; import java.io.inputstream; import java.io.printwriter;  import org.bukkit.configuration.invalidconfigurationexception; import org.bukkit.configuration.file.fileconfiguration; import org.bukkit.configuration.file.yamlconfiguration;  public class langhandler {     private static string lwarns_deletedwarnaddon, lwarns_expiredwarnaddon;      public static string getlwarns_deletedwarnaddon() {         return lwarns_deletedwarnaddon;     }      public static string getlwarns_expiredwarnaddon() {         return lwarns_expiredwarnaddon;     }      public void createconfig(boolean forceconfigupdate) {         try {             string langfilename = "languageen.yml";             inputstream input = professionalwarns                     .getpluginresource_languageen();             if (confighandler.getcgeneral_language().equalsignorecase("pl")) {                 langfilename = "languagepl.yml";                 input = professionalwarns.getpluginresource_languagepl();             }             file langfile = new file(professionalwarns.getplugindatafolder(),                     langfilename);             if (!langfile.exists()) {                 langfile.getparentfile().mkdirs();                 confighandler.copy(input, langfile);             }             yamlconfiguration lang = new yamlconfiguration();             fileconfiguration rawlang = yamlconfiguration                     .loadconfiguration(input);             lang.load(langfile);              lwarns_deletedwarnaddon = lang.getstring("warns.deletedwarnaddon",                     rawlang.getstring("warns.deletedwarnaddon"));              lwarns_expiredwarnaddon = lang.getstring("warns.expiredwarnaddon",                     rawlang.getstring("warns.expiredwarnaddon"));              if (confighandler.iscgeneral_autoupdateconfigs()                     || forceconfigupdate) {                 filewriter fw = new filewriter(langfile);                 printwriter pw = new printwriter(fw);                 pw.flush();                 pw.write("warns:\n  deletedwarnaddon: '"                         + lwarns_deletedwarnaddon + "'\n  expiredwarnaddon: '"                         + lwarns_expiredwarnaddon + "'");                 pw.close();             }         } catch (ioexception | invalidconfigurationexception e) {             e.printstacktrace();             professionalwarns                     .logwarning("error when trying create/write/reload language file!");         }     } } 

i don't have idea how use utf-8 here.

i don't want delete features.

if can, give me advices code :)

//sorry english

based on comment, i'm going blame use of filewriter:

filewriter fw = new filewriter(langfile); 

this relies on installation's default encoding, i'm willing bet not utf-8. can verify following:

system.out.println(charset.defaultcharset()); 

regardless, correct way write utf-8 characters file use outputstreamwriter:

fileoutputstream fos = new fileoutputstream("your_file"); outputstreamwriter osw = new outputstreamwriter(fos, "utf-8"); printwriter pw = new printwriter(osw); 

and unless one-off code, should close fileoutputstream in finally block.