I have created a BubbleSort class in Java. I would like to test that class with

Question

I have created a BubbleSort class in Java. I would like to test that class with an array in a class called TestSort. How do I call the BubbleSort class to sort the array in the new class?

-----------------------------------------------------

import java.util.*;

public class BubbleSort
{
static void bubbleSort(int[] arr)
{
int n = arr.length;
int temp = 0;
  
   for(int i=0; i < n; i++)
   {
   for(int j=1; j < (n-i); j++)
   {
if(arr[j-1] > arr[j])
{

   temp = arr[j-1];
   arr[j-1] = arr[j];
   arr[j] = temp;
   }

   }
   }

}
}

---------------------------------------------------------------------

import java.util.*;

public class TestSort
{


   public static void main(String[] args)
   {
  
   int[] anArray ={26,45,67,89,23,47,32,98};
  
   BubbleSort bs = new BubbleSort();

   int[] newArray = bs.bubbleSort(anArray);

   }
  
}

Explanation / Answer

bubbleSort() method in BubbleSort class is a static method. You should call these methods using the class name not using an object of the class. Also the bubbleSort() method doesn't return anything , it makes modifications to the same array that is passed to it.

So your TestSort class should look like this :

import java.util.*;

public class TestSort
{

public static void main(String[] args)
{
int[] anArray ={26,45,67,89,23,47,32,98};
BubbleSort.bubbleSort(anArray);

// I have added code to print the array after sorting.

for(int i=0; i< anArray.length; i++){

System.out.print(anArray[i] + " ");
}
}

}

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