CODEWITHSUNDEEP
javamultidimensional-array
Jake
Jake

Reputation: 1

Is there a way to clear an array and basically reset it to its past contents

i basically want to reset an array once i have shot all the elements in my array/game. is there a way i can clear my 2D array and basically reset it so that all the elements i have shot and declared null then return?

Upvotes: 0

Views: 408

Answers (2)

Ahmad
Ahmad

Reputation: 1474

you can clear array by Loop over the array and and set each element to null.

for( int i = 0; i < yourArray.length; i++ )
   Arrays.fill( yourArray[i], null );

you cannot restore past contents except you can make backup (Copy) of your array for later use.

Deep Copy Code:

public int[][] copy(int[][] input) {
      int[][] target = new int[input.length][];
      for (int i=0; i <input.length; i++) {
        target[i] = Arrays.copyOf(input[i], input[i].length);
      }
      return target;
}

Upvotes: 0

Kayaman
Kayaman

Reputation: 73578

You can keep a (deep) copy of the original array, and at the end just make a new working copy of it.

If you're not making changes to the actual objects inside the array, you could just do a shallow copy with Foo[][] backup = original.clone();, but if the objects in the array have state (for example health), you'll need to loop the array by hand and create deep copies of the objects.

Upvotes: 2

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