Question

I’ve an array of objects in Java. Say these objects Obj contain a variable var, and I have several Obj stored in an array Array[].

I’d like to compare the var between two adjacent Obj but I don’t know how, nor can I find any info online (which makes me think i’m working my question wrong or it’s not doable or something)

Edit:

I’m currently attempting the rather roundabout method of assigning the array objects in question to new temporary objects and just doing the comparison with those:

Obj o1 = o[i];
Obj o2 = o[i+1];

if (o1.var > o2.var)
//etc

But surely there is something better.

Answer 1

If you have an array of objects, you can do your comparison without creating the temporary references:

MyObject[] arr = //populated somehow
for (int index = 0; index < arr.length - 1; index++) {
  if (arr[index].var > arr[index + 1].var) {
    //your logic
  }
}

You might also want to take a look at the Comparable interface as a means of encapsulating the comparison of the objects based on a particular field. Using this interface would allow you to take advantage of its support in the Collections API.