Re: Finding Duplicate Values In An Array List

http://www.dreamincode.net/forums/topic/349987-finding-duplicate-values-in-an-array-list/

My solution:

CLASS Populate:

import java.util.*;

class Populate {
   
   // goal: populate twenty entries for array.
   // 1. get an input from keyboard an integer value.
   // 2. check its between 10 and 100.
   // 3. check its a duplicate.
   // 4. add to the array.
   // 5. print content of array after each insertion.
   
   static Scanner kb=new Scanner(System.in);
   
   int[] array=new int[20];
   int current_size;
   int candidate;
   
   Populate() {
       current_size=0;
   }
   
   void generateCandidate() {
       candidate=kb.nextInt();
   }
   
   void killKB() {
       kb.close();
   }
   
   int getCandidate() {
       return candidate;
   }
   
   boolean checkBoundary(int chk) {
       if (chk>=10 && chk<=100) return true;
       else return false;
   }
   
   // check an integer against all values of the array
   boolean checkIsDuplicate(int chk) {
       for (int i=0; i<current_size; i++) {
           if (chk==array[i]) return true;
       }
       return false;
   }
   
   void addEntry(int chk) {
       array[current_size]=chk;
       current_size++;
   }

   void print() {
       for (int i=0; i<current_size; i++) {
           System.out.print(array[i]);
           System.out.print(" ");
       }
       System.out.println();
   }
}

CLASS PopulateMain

class PopulateMain {
   public static void main(String[] args) {
       Populate pop=new Populate();
       
       // how to populate twenty entries?
       int total=0;
       while (total<20) {
           pop.generateCandidate();
           int c=pop.getCandidate();
           if (pop.checkBoundary(c) && !pop.checkIsDuplicate(c)) {
               pop.addEntry(c);
               total++;
               
               // print only after adding an entry.
               pop.print();
           }
       }
       //pop.killKB();
   }
}

God BLESS YOU!