Question

Ch. 09: Exclusive find in Array (Arrays, conditional, counter)

Write a method that will receive an array of integers and an integer value as a parameter. The integer value received as the second parameter will be searched within the Array received as the other parameter. The method will return true if the value appears only once in the Array. Use the "documentation shown in the program as a guide".

As an example, if the array received was the sequence of [3, 5, 25, 5, 4, 1] and the value to search was 5 the result would be false and true if the value was 4 or 1.

Here is the default code ...

import java.util.*;

public class Main{

public static final Scanner CONSOLE = new Scanner(System.in);

// Declare your method here
public static ///...

}

public static void main(String[] args){
  
// Declaring and initializing the array
int[] values = {88, 25, 79, 84, 29, 45, 56, 23, 92, 100, 105, 28, 32, 25, 1, 2, 3, 1, 3};
  
int search = CONSOLE.nextInt();
  
if (exclusiveFind(values, search)) // If the method call returns true
System.out.println("The value " + search + " was exclusively only one time in the array");
else // When the method returns not true (false)
System.out.println("The value " + search + " was NOT exclusively only one time in the array");
  
  
}

}

Answer 1

Program code to copy:-

import java.util.*;
public class Main {
   public static final Scanner CONSOLE = new Scanner(System.in);

   // This method receives an array of integers and an integer value as a parameter.
   //The integer value received as the second parameter will be searched within the Array received as the other parameter.
   //This method will return true if the value appears only once in the Array.
   public static Boolean exclusiveFind(int[] values, int search) {
      
       //Determining the length of array
       int len = values.length;
       //Variable to store the number of times an element to be searched repeated in an array
       int repeat=0;
      
       //Loop to search the element
       for(int i=0; i<len; i++) {
           if(values[i] == search)
               repeat++;
       }
       //Checking number of times an element is repeated
       if(repeat==1)
           return true; //Returns true when searched element is exclusively only one time in the array
       else
           return false; //Returns false when searched element is exclusively only one time in the array
   }
  
   public static void main(String[] args) {
       // Declaring and initializing the array
       int[] values = {88, 25, 79, 84, 29, 45, 56, 23, 92, 100, 105, 28, 32, 25, 1, 2, 3, 1, 3};
      
       System.out.print("Enter the integer number to be searched in an array: ");
       int search = CONSOLE.nextInt();
      
       if (exclusiveFind(values, search)) // If the method call returns true
           System.out.println("The value " + search + " was exclusively only one time in the array");
       else // When the method returns not true (false)
           System.out.println("The value " + search + " was NOT exclusively only one time in the array");
   }

}

Screenshot of output:-