java array copy
// Shallow copy
int[] src = {1,2,3,4,5};
int[] dst = Arrays.copyOf(src, src.length);
// Deep copy
int[] dst2 = new int[src.length];
for(int i = 0; i < src.length; i++){
dst2[i] = src[i];
}java array copy
// Shallow copy
int[] src = {1,2,3,4,5};
int[] dst = Arrays.copyOf(src, src.length);
// Deep copy
int[] dst2 = new int[src.length];
for(int i = 0; i < src.length; i++){
dst2[i] = src[i];
}how to do copy of an array in java
import java.util.Scanner;
public static void main(String[] args){
Scanner scan = new Scanner(System.in);
System.out.println("Enter Number of Elements");
int NumOfElements = scan.nextInt();
int [] ar1 = new int[NumOfElements];
int [] ar2 = new int[NumOfElements];
for(int i=0; i<NumOfElements; i++){
ar1[i] = scan.nextInt();
ar2[i] = ar1[i];
}
for(int i=0; i<NumOfElements;i++){
System.out.println("Original array");
System.out.println(ar1[i]);
System.out.println("Copied array");
System.out.println(ar2[i]);
}
}System arraycopy() method in java
public class SystemArraycopyMethodExample
{
public static void main(String[] args)
{
int[] arrOne = {2,4,6,8,10,12,14,16,18,20};
int[] arrTwo = {1,3,5,7,9,11,13,15,17,19};
int[] sourceArr, sourcePosition, destinationArr[], destinationPosition, len;
sourceArr = arrOne;
sourcePosition = 2;
destinationArr = arrTwo;
destinationPosition = 5;
len = 4;
// printing elements of source array
System.out.println("Source array : ");
for(int a = 0; a < arrOne.length; a++)
System.out.print(arrOne[a] + " ");
System.out.println("");
System.out.println("sourcePosition : " + sourcePosition);
// print elements of destination array
System.out.println("Destination array : ");
for(int a = 0; a < arrTwo.length; a++)
System.out.print(arrTwo[a] + " ");
System.out.println("");
System.out.println("destinationPosition : " + destinationPosition);
System.out.println("Length : " + len);
// system.arraycopy method in java
System.arraycopy(sourceArr, sourcePosition, destinationArr, destinationPosition, len);
// printing final array
System.out.println("Final array : ");
for(int a = 0; a < arrTwo.length; a++)
System.out.print(arrTwo[a] + " ");
}
}Copyright © 2021 Codeinu
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