java - Using an Integer ArrayList in Android -


i needing creating arraylist , adding integers them. essentially, have card game pulls card , saves id (bcid). want add pulled id arraylist, can avoid pulling same card twice. have setup below, keep getting duplicates. know cards pulling correctly, displays fine - repeated cards, unfortunately.

any can provide great! have done best include relevant parts. if need additional information, let me know.

public static integer bcid1, bcid2, bcid3, bcid4, bcid5, bcdcid; public static list<integer> usedcards = new arraylist<integer>();

in example below, supposed detect duplicate initialize sequence draw different card.

    public static void setids()  {     try      {         bcid1 = integer.parseint(bc1);         usedcards.add(bcid1);     }     catch(numberformatexception nfe)     {       }      try      {         bcid2 = integer.parseint(bc2);         if (usedcards.contains(bcid2))         {             try              {                 bluecard2(ctx);             } catch (ioexception e) {                 e.printstacktrace();             }         }         else         {             usedcards.add(bcid2);         }     }     catch(numberformatexception nfe)     {       }      try      {         bcid3 = integer.parseint(bc3);         if (usedcards.contains(bcid3))         {             try              {                 bluecard3(ctx);             } catch (ioexception e) {                 e.printstacktrace();             }         }         else         {             usedcards.add(bcid3);         }     }     catch(numberformatexception nfe)     {       }      try      {         bcid4 = integer.parseint(bc4);         if (usedcards.contains(bcid4))         {             try              {                 bluecard4(ctx);             } catch (ioexception e) {                 e.printstacktrace();             }         }         else         {             usedcards.add(bcid4);         }     }     catch(numberformatexception nfe)     {       }      try      {         bcid5 = integer.parseint(bc5);         if (usedcards.contains(bcid5))         {             try              {                 bluecard5(ctx);             } catch (ioexception e) {                 e.printstacktrace();             }         }         else         {             usedcards.add(bcid5);         }     }     catch(numberformatexception nfe)     {       } }

use hashset instead of arraylist. set not allow duplicate.


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