Question

Write a program in Java to accept a list of 20 integers. Sort the first 10 numbers in ascending order by using selection sort technique and next 10 numbers in descending order by using bubble sort technique. Finally print the complete list of integers.

Plz answer if u are sure.

Answer 1

Here's the Java Code for the program. Description is given as comments. Paste the code into an IDE so that Code and Comments are visible properly:



import java.util.Scanner;           //Importing Scanner
public class Brainly_Java           //Creating Class
{
    public static void main(String[] args)   //Creating main() function
    {
        Scanner sc = new Scanner(System.in);        //Creating Scanner object

        int arr1[] = new int[10];                   //Creating an array for first 10 elements
        int arr2[] = new int[10];                   //Creating an array for next 10 elements   
       
        for(int i=0;i<10;i++)                       //Loop for taing input of first 10 elements
        {
            System.out.print("Enter Number ["+(i+1)+"] : ");    //Asking for user input
            arr1[i] = sc.nextInt();                             //Scanning User Input
        }
       
        for(int i=0;i<10;i++)                       //Loop for taking uer input of next 10 elements
        {
            System.out.print("Enter Number ["+(i+11)+"] : ");   //Asking for user input
            arr2[i] = sc.nextInt();                             //Scanning User Input
        }
       
        System.out.println();
        System.out.println("The elements are: \n");
       
        displayArray(arr1);             //Displaying elements with a displayArray(int arr[]) function
        displayArray(arr2);
       
        System.out.println("\n");
       
        System.out.println("The first ten elements in ascending order, sorted by Selection Sort are: ");
        selectionSort(arr1);        //Sorting arr1 by Selection Sort
        displayArray(arr1);         //Displaying sorted arr1
       
       
        System.out.println("\n");
       
        System.out.println("The last ten elements in descending order, sorted by Bubble Sort are: ");
        descendingBubbleSort(arr2); //Sorting arr2 in Decending Order by Bubble Sort
        displayArray(arr2);         //Displaying sorted arr2
       
       

    }
   
    static void selectionSort(int arr[])        //Selection Sort function
    {
        for(int i=0;i<arr.length-1;i++)         //Outer Loop runs through the Array, and moves the boundary of unsorted subarray
        {  
            int min = i;                        //Minimum Value Index Position is assumed to be i
           
            for(int j=i+1;j<arr.length;j++)     //Inner Loop runs from i+1 to last element of arr to find minimum value in unsorted part
            {
                if (arr[j]<arr[min])           
                {
                    min = j;                    //Storing index position of minimum value in min
                }
            }
           
            if(min!=i)                      //Swapping Minimum Element with first element
            {
                int temp = arr[i];
                arr[i] = arr[min];
                arr[min] = temp;
            }
        }
    }
   
    static void descendingBubbleSort(int arr[])     //Descending Order Bubble Sort function
    {
        int n = arr.length;                 //Storing array length in n
        for(int i=0;i<n-1;i++)         
        {
            for(int j=0;j<n-i-1;j++)
            {
                if(arr[j]<arr[j+1])         //Comparing two adjacent elements
                {
                    int temp = arr[j];      //If bigger element is on the right, then the two elements are swapped
                    arr[j] = arr[j+1];
                    arr[j+1] = temp;
                }
            }
        }
    }
   
    static void displayArray(int arr[])     //Function to display elements of an array
    {
        for(int i=0;i<arr.length;i++)      
        {
            System.out.print(arr[i]+" ");       //Printing array elements
        }
    }
   
}

Answer 2

Explanation:

i hope it helps

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