java - Check if the number entered is in array, otherwise add to the array -

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the user enter size of array , values. if entered value exists, user must enter different number. can't seem construct proper code check if inserted value exists.

public static void main(string[] args) {    string holder="", s;    int size;     s=joptionpane.showinputdialog("enter size of array");    size= integer.parseint(s);    string array1[]= new string[size]; //declared , instantiated array1     (int x=0; x<=array1.length-1;x++)    {        array1[x]=joptionpane.showinputdialog("enter value array[" +x +"]");          int a=0;        if (array1[x].equals(array1[x])){            a=1;            joptionpane.showmessagedialog(null, "exists");        }        else            joptionpane.showmessagedialog(null, "continue");    }     (int x=0; x<=array1.length-1;x++)    {       holder=holder+ "\n"+ array1[x];    }      joptionpane.showmessagedialog(null,holder);

how this? checks if value exists, otherwise user needs re-enter number.

public static void main(string[] args) {     string holder = "", s;     int size;      s = joptionpane.showinputdialog("enter size of array");     size = integer.parseint(s);     string array1[] = new string[size]; //declared , instantiated array1      (int x = 0; x <= array1.length - 1; x++) {         string num = joptionpane.showinputdialog("enter value array[" + x + "]");          if (arrays.aslist(array1).contains(num)) {             x = x - 1;             joptionpane.showmessagedialog(null, "exists");         } else {             array1[x] = num;             joptionpane.showmessagedialog(null, "continue");         }     }      (int x = 0; x <= array1.length - 1; x++) {         holder = holder + "\n" + array1[x];     }      joptionpane.showmessagedialog(null, holder); }

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