How to initialize an array to empty?

Asked Nov 04 '18 at 23:43

Active Nov 04 '18 at 23:43

Viewed 44 times

My current class project is dealing with hashtables. We are able to use whatever language we want, however the professor uses c++.

This is the sample code he provided us that we are supposed to copy over:

 for(int i = 0; i < size; i++)
      this->theTable[i] = EMPTY;

He says this will set the array, theTable, to empty.

How am I supposed to do this in Java? Isn't an array in Java always set to 0 if its empty? Is this code equivalent?

 for(int i = 0; i < size; i++) {
           this.theTable[i] = 0;
 }

asked Nov 04 '18 at 23:43

johntc121

What type is `theTable`? – GBlodgett Nov 04 '18 at 23:45
That code is not necessary in Java, as you noted every Java array has a default initial value for its' elements. `int[] theTable = new int[size];` is equivalent. Assuming `theTable` is an array of `int`. – Elliott Frisch Nov 04 '18 at 23:46
Yes, theTable is an int array, sorry. So no point to have the for loop then correct? – johntc121 Nov 04 '18 at 23:48
In addition to what @ElliottFrisch said, this code is correct (and needed) if `theTable` is of type `Integer[]` – Kartik Nov 04 '18 at 23:49
What is `EMPTY`? – shmosel Nov 04 '18 at 23:50
you can always print and see the values of an array yourself `Arrays.stream(theTable).forEach(System.out::println);` – Kartik Nov 04 '18 at 23:50
Im not sure what EMPTY is. No idea if its a c++ thing or not. But nothing else about it in the sample code given to us. – johntc121 Nov 05 '18 at 00:08

0 Answers0