builtInMethods.java

// Using built in methods to sort & copy the array elements
package arrays;
import java.util.Arrays;
import java.util.Scanner;
public class builtInMethods {
    public static void main(String[] args) {
         Scanner sc=new Scanner(System.in);
    System.out.println("Enter the number of elements: ");
    int n=sc.nextInt();
    int[] arr=new int[n];
    System.out.println("Enter the elements: ");
    for(int i=0; i<n; i++){
        arr[i]=sc.nextInt();
    }
    // Sorting the array (in ascending order)
    Arrays.sort(arr);   //***VVI
    System.out.println("New sorted array is: ");
     for(int ele : arr){
            System.out.print(ele+" ");
        }
    System.out.println();
    // copy the elements of an array in a new array

    // int [] brr = arr;  // SHALLOW COPY: Asole kono new array toiri e hoi ni. brr sudhu arr er e arek naam. Mane jodi brr er kono value change kora hoi tahole arr eu seta change hoye jabe. 
   
    // DEEP COPY: notun array toiri kore sekhane element gulo copy kore store kora.
    int [] brr=Arrays.copyOf(arr,arr.length);   //***VVI
    brr[0]=70; // changing the 0th element 
    System.out.println("brr:");
     for(int ele : brr){
            System.out.print(ele+" ");
        }
    System.out.println();
    System.out.println("arr: ");
     for(int ele : arr){
            System.out.print(ele+" ");
        }
    System.out.println();
    //Method 2 of DEEP COPY: (Without using built in methods)
    int [] crr= new int[arr.length];
    for(int i=0; i<arr.length; i++){
        crr[i]=arr[i];
    }
    System.out.println("crr: ");
     for(int ele : crr){
            System.out.print(ele+" ");
        }
     }
}