copy array without specified element java

Question

i'm trying copy an array without a specified element. Let's say I have the following arrays:

int[] array = {1,2,3,4,5,6,7,8,9}; int[] array2 = new int[array.length-1];

what I want is to copy array to array2 without the element containing the int "6" so it will contain "{1,2,3,4,5,7,8,9}"

I only want to use for loops and this is what I have so far but it doesnt work

int[] array= { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; int[] array2= new int[array.length - 1]; int remove = 6; for (int i = 0; i < array2.length; i++) { if (array[i] != remove) { array2[i] = array[i]; } else { array2[i] = array[i + 1]; i++; } } for (int i = 0; i < array2.length; i++) { System.out.println(array2[i]); }

Thanks

What are tab and tab2? And "but it doesnt work" is not a good replacement for an error message. — Tom
– Tom, Commented Oct 5, 2014 at 21:58
What exactly doesnt work? do you get an error? another result? just plain nothing? — Jonatan Cloutier
– Jonatan Cloutier, Commented Oct 5, 2014 at 22:07

MT0 · Accepted Answer · 2023-01-10 11:15:39Z

You can also do it using Java 8's streams and lambda expressions:

int[] array= { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; int[] array2 = Arrays.stream( array ).filter( value -> value != 6 ).toArray(); System.out.println( Arrays.toString( array2 ) ); // Outputs: [0, 1, 2, 3, 4, 5, 7, 8, 9]

Abbath · Accepted Answer · 2014-10-05 21:59:51Z

5

int j = 0; int count = 0; //Set this variable to the number of times the 'remove' item appears in the list int[] array2 = new int[array.length - count]; int remove = 6; for(int i=0; i < array.length; i++) { if(array[i] != remove) array2[j++] = array[i]; }

answered Oct 5, 2014 at 21:59

Abbath

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4 Comments

Bob J Over a year ago

thanks but the last element of array2 is not copied, there a 0 instead of a 9

Tom Over a year ago

@BobJ I guess you forgot to change int count = 0; to int count = 1;?

Bob J Over a year ago

no ive put array.length2 instead of array.length . thanks it works

Abbath Over a year ago

You may want to use the count since there may be duplicate values in the array which will result in the array having a series of 0's at the end.

gce · Accepted Answer · 2022-04-12 14:08:18Z

0

ArrayUtils.remove(array, 6) from apache.commons.lang might also be suitable

answered Apr 12, 2022 at 14:08

gce

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