java - How can I get the user input to use the proper instructions and quit out the program? -

so i'm having problem boolean method 'typeofsearch' user asked enter type of search use whether success, fail , or quit out search. method i'm using don't acknowledge success or fail input quit input causes recurse . doing wrong? advice!

import java.util.scanner;  public class interpolation{      private static double[] arr;     private static final int size = 1000;      public static void main(string[] args) {         scanner input = new scanner(system.in);         arr = new double[size];          system.out.println("enter index: ");         double sv = input.nextdouble();         int lb = 0;         int ub = 999;          randomfill(arr);         system.out.println("sorted result:");         sort();         print(arr);          typeofsearch(sv, lb, ub);          system.out.println("interpolation result:");         system.out.println(interpolationsearch(arr, size, sv, lb, ub));      }       public static int interpolationsearch(double[] arr, int size, double sv, int lb, int ub) {         int result;           int sp = (int) (lb + ((sv - arr[lb]) / (arr[ub] - arr[lb])) * (ub - lb));          if (arr[lb] == sv) {             return lb;         } else if (arr[sp] < sv && arr[sp + 1] > sv) {             return -1;          }          if (arr[sp] < sv) {             return sp;         }          else if (arr[sp] < sv) {             result = interpolationsearch(arr, size, sv, (sp + 1), ub);         } else {              result = interpolationsearch(arr, size, sv, lb, sp - 1);         }         return result;      }      public static void print(double[] arr) {         (double num : arr) {             system.out.println(num + "");         }         system.out.println();     }      public static void randomfill(double[] arr) {         (int = 0; < arr.length; i++) {             arr[i] = (math.random() * size);         }     }      @suppresswarnings("empty-statement")     public static boolean typeofsearch(double sv, int lb, int ub) {         scanner input = new scanner(system.in);         int sp = 0;         int success = input.nextint();         int fail = input.nextint();         int quit = input.nextint();         boolean cont = true;         {             system.out.println("enter type of search: ");             if (success == 1) {                 sv = arr[sp];                 interpolationsearch(arr, size, sv, lb, ub);                 system.out.println("true");              } else {                 system.out.println("enter type of search: ");                 if (fail == 0) {                     sv = arr[sp] + arr[sp + 1] / 2;                     interpolationsearch(arr, size, sv, lb, ub);                     system.out.println("false");                 }             }         } while (cont);          if(quit == -1){             system.out.println("quit search");         }          return !cont;     }      private static void sort() {         (int sorted = 1; sorted < arr.length; sorted++) {             if ((arr[sorted] < arr[sorted - 1])) {                 (int = sorted; > 0; i--) {                     if (arr[i] < arr[i - 1]) {                         swap(i, - 1);                     } else {                         break;                     }                 }             }         }     }      private static void swap(int i, int j) {         double temp = arr[i];         arr[i] = arr[j];         arr[j] = temp;     }  } 

i didn't why using success, fail , quit variables. think should read type of search inside loop , use fixed code quit. example:

int typeofsearch;  while ((typeofsearch=input.nextint())!=-1) { // code choose type of search based on user input } 

however, couldn't understand search type options of program.