How to return two objects in one method without using pair?

Question

I want to return m and n but return (m, n) won't work. Is there any way I can return the two values? I am not suppose to use Pair as I have not been taught about it yet.

public static void getTwoIntegers(MyInteger m, MyInteger n)
{
     Random rand = new Random();

     m = new MyInteger(rand.nextInt(10));
     n = new MyInteger(rand.nextInt(10));

}

score 1 · Answer 1 · edited Aug 11 '18 at 21:49

1

You can return in an array,

public static MyInteger[] getTwoIntegers(){
   Random rand = new Random();
   MyInteger m = new MyInteger(rand.nextInt(10));
   MyInteger n = new MyInteger(rand.nextInt(10));
   return new MyInteger[] {m,n};
}

edited Aug 11 '18 at 21:49

Mustapha Belmokhtar

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answered Aug 11 '18 at 21:20

Praveen

1,791
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1

I guess, `m` and `n` should't be parameters of the method, `getTwoIntegers() {...} ` would be efficient. – Mustapha Belmokhtar Aug 11 '18 at 21:46
1

@мυѕτавєւмo - Yep thats right. We don't need that If we are returning it in an array. Thanks, I have updated my answer :) – Praveen Aug 11 '18 at 21:48

Nondv · Answer 2 · 2018-08-11T21:45:55.517

It's been a while since I wrote any java code, but can't you just use an array?

Or use some wrapper-object (you are allowed to use objects, rights?) like new SomeClass(m, n)

upd

Array:

public static MyInteger[] getTwoIntegers(MyInteger m, MyInteger n)
{
     Random rand = new Random();

     m = new MyInteger(rand.nextInt(10));
     n = new MyInteger(rand.nextInt(10));
     MyInteger[] result = {m, n};
     return result;
}

upd2

Object:

public static MyIntegerPair getTwoIntegers(MyInteger m, MyInteger n)
{
     Random rand = new Random();

     m = new MyInteger(rand.nextInt(10));
     n = new MyInteger(rand.nextInt(10));
     return new MyIntegerPair(m, n);
}

public class MyIntegerPair {
    public MyInteger first;
    public MyInteger second;
    public MyIntegerPair(f, s) {
        this.first = f;
        this.second = s;
    }
}

good, but you used `void` in the method signature, and then you use `return` — Mustapha Belmokhtar, Aug 11 '18 at 21:43

score 0 · Answer 3 · answered Aug 11 '18 at 21:17

Another concept besides returning a value.

public static void getTwoIntegers(List<MyInteger> ret)
{
     Random rand = new Random();

     MyInteger m = new MyInteger(rand.nextInt(10));
     MyInteger n = new MyInteger(rand.nextInt(10));
     ret.add(m);
     ret.add(n);
}

Now getting 3 or 4 integers is just as simple.

How to return two objects in one method without using pair?

3 Answers3

upd

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