Answers for "array copy in java"

3

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];
}
Posted by: Guest on May-18-2020
1

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]);
  }
}
Posted by: Guest on October-25-2021
5

java copy array

int[] a = {1,2,3,4,5};
int[] b = Arrays.copyOf(a, a.length);
Posted by: Guest on April-25-2020
0

how to copy array in java

// method 
public static int [] copyArray(int [] arr){
      int [] copyArr = new int[arr.length];
      for (int i = 0; i < copyArr.length; i++){
            copyArr[i] = arr[i];
       }
      return copyArr;
}

// Arrays. method 
int[] copyCat = Arrays.copyOf(arr, arr.length);

// System 
System.arraycopy(x,0,y,0,5); // 5 is array's length 

// clone 
y = x.clone();
Posted by: Guest on August-01-2020
0

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] + " ");
   }
}
Posted by: Guest on November-10-2020

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