comparing arrays in java

Question

int [] nir1 = new int [2];
nir1[1] = 1;
nir1[0] = 0;


int [] nir2 = new int [2];
nir2[1] = 1;
nir2[0] = 0;

boolean t = nir1.equals(nir2);
boolean m = nir1.toString         


        

Answer 1

I just wanted to point out the reason this is failing:

arrays are not Objects, they are primitive types.

When you print nir1.toString(), you get a java identifier of nir1 in textual form. Since nir1 and nir2 were allocated seperately, they are unique and this will produce different values for toString().

The two arrays are also not equal for the same reason. They are separate variables, even if they have the same content.

Like suggested by other posters, the way to go is by using the Arrays class:

Arrays.toString(nir1);

and

Arrays.deepToString(nir1);

for complex arrays.

Also, for equality:

Arrays.equals(nir1,nir2);