Array copy 1 Answer(s) 2 years and 7 months ago
Posted in : Java Beginners
Hello all.
could someone telle me how to copy an array (holding random numbers) to a new array...( then make randomnumbers on this new array ) but without changing the excisting array ? last . possibility to print out the new array with the random numbers and index numbers as well ?
best regards chipollini
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October 16, 2010 at 2:54 PM
Hi Friend,
Try the following code:
import java.util.*; class ArrayExample1 { public static int[] copyArray(int[]... arr) { int arrSize = 0; for (int[] array : arr) { arrSize += array.length; } int[] result = new int[arrSize]; int j = 0; for (int[] array : arr) { for (int s : array) { result[j++] = s; } } return result; } public static void main(String[] args) { Random r=new Random(); int arr[]=new int[5]; System.out.println("Original Array is:"); for(int i=0;i<arr.length;i++){ arr[i]=r.nextInt(10); System.out.println(arr[i]); } System.out.println(); System.out.println("Copied Array is:"); int array[] = (int[]) copyArray(arr); for(int i=0;i<array.length;i++){ System.out.println(array[i]+" is at index: "+i); } } }
Thanks
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