java - Println error using enumate paramer and import error -

-

i have enumeration class this:

public enum elementi {          idrogeno("h", 1, 1.008),         elio("he", 2, 4.003),         // ... altri elementi         litio("li", 3, 6.491);          private int numeroatomico;         private double massaatomica;          private string simbolo;          public int getnumeroatomico() {             return numeroatomico;         }          public string getsimbolo() {             return simbolo;         }          private elementi(string simbolo, int numeroatomico, double massaatomica){              this.simbolo = simbolo;             this.numeroatomico = numeroatomico;             this.massaatomica = massaatomica;         } }

in file have main program this:

import java.util.elementi;  public class main{      public static void main (string[] args){          (elementi e: elementi.values())             system.out.println("%s\t|\t%d|\t%s\n", e.getsimbolo(),e.getnumeroatomico(), e);     } }

if compile , execute both 2 files following errors:

-main.java:1: error: cannot find symbol import java.util\\\.\\\elementi;  symbol: class elementi location: package java.util  -main.java:7: error: no suitable method found println (string, string, int, elementi)                         system.out\\\.\\\println("%s\t|\t%d|\t%s\n", e.getsimbolo(), e.getnumeroatomico(), e);  method printstream.println(object) not applicable (actual , formal argument lists differ in lenght) method printstream.println(string) not applicable (actual , formal argument lists differ in lenght) method printstream.println(char[]) not applicable (actual , formal argument lists differ in lenght) method printstream.println(double) not applicable (actual , formal argument lists differ in lenght) method printstream.println(float) not applicable (actual , formal argument lists differ in lenght) method printstream.println(long) not applicable (actual , formal argument lists differ in lenght) method printstream.println(int) not applicable (actual , formal argument lists differ in lenght) method printstream.println(char) not applicable (actual , formal argument lists differ in lenght) method printstream.println(boolean) not applicable (actual , formal argument lists differ in lenght) method printstream.println() not applicable (actual , formal argument lists differ in lenght)  2 errors

i put 2 errors between \\ this: \\error\\

i fix these problems

thanks all

  1. i don't think elementi in java.util package. import proper package.
  2. system.out.println() doesn't take varargs , format string. use system.out.printf() instead.

Comments

Post a Comment

Popular posts from this blog

yii2 - Yii 2 Running a Cron in the basic template -

-
i have seen instructions on running cron in advanced template, cant figure out how on basic template. have following controller in basic controllers folder. <?php namespace app\controllers; use yii\console\controller; /** * cron controller */ class croncontroller extends controller { public function actionindex() { echo "cron service runnning"; } public function actionmail($to) { echo "sending mail " . $to; } } i have navigated root of application , tried these comands yii cron php yii cron im getting unknown comand "cron" i know old question failed find actual answer this. if @ code yii exec file you'll notice requires /common/config/aliases.php file console/config/main.php. can naturally change these or copy on these advanced template. hope solves problem wanting same thing.
Read more

asp.net - 'System.Web.HttpContext' does not contain a definition for 'GetOwinContext' Mystery -

-
i realize question might seem trivial some, it's these types of things find myself fighting quite bit , want make sense of despite seeming losing battle in .net (for me anyway). so, if following: using system.web; ... applicationuser user = system.web.httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); that produces error in title , red getowincontext() , error cannot resolve symbol 'getowincontext()' however, if following (remove system.web in front of httpcontext ), works expected (or @ least no errors): using system.web; ... applicationuser user = httpcontext.getowincontext().getusermanager<applicationusermanager>().findbyid(system.web.httpcontext.user.identity.getuserid()); however, if (same line that's working using system.web commented out): //using system.web; ... applicationuser user = httpcontext.getowincontext().getusermana...
Read more

android - Crash when clicking button with custom theme -

-
i creating custom theme button , using android:onclick event of button xml handle click of button. due reason crashing below exception java.lang.illegalstateexception: not find method myonclick(view) in activity class android.view.contextthemewrapper onclick handler on view class android.widget.button id 'button1' and working fine if remove theme attribute button, below theme button <style name="buttontheme" parent="@android:style/widget.button"> <item name="android:textcolor">#ff0000</item> <item name="android:shadowcolor">#ff000000</item> </style> and button defined in xml below, <button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textview1" android:layout_margin="20dp" android...
Read more