Return more than one value from a function in Java

Question

How to return more than one value from a function in Java? Can anyone give sample code for doing this using tuples? I am not able to understand the concept of tuples.

---

public class Tuple{
    public static void main(String []args){
        System.out.println(f());
    }
    static Pair<String,Integer> f(){
        return new Pair<String,Integer>("hi",3);
    }
    public class Pair<String,Integer> {
        public final String a;
        public final Integer b;

        public Pair(String a, Integer b) {
            this.a = a;
            this.b = b;
        }
    }
}

What is the mistake in the above code?

Answer 1

Create a class that holds multiple values you need. In your method, return an object that's an instance of that class. Voila!

This way, you still return one object. In Java, you cannot return more than one object, whatever that may be.

Answer 2

Is this what you are looking for?

public class Tuple {
    public static void main(String[] args) {
        System.out.println(f().a);
        System.out.println(f().b);
    }

    static Pair<String, Integer> f() {
        Tuple t = new Tuple();
        return t.new Pair<String, Integer>("hi", 3);

    }

    public class Pair<String, Integer> {
        public final String a;
        public final Integer b;

        public Pair(String a, Integer b) {
            this.a = a;
            this.b = b;
        }
    }
}

Answer 3

You can't return more than one value.

You can return Array,Collection if it satisfies your purpose.

Note: It would be one value, reference to your Object[of array,collection] would be return.