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Say I have a java function as follows,

public static int my(int a, int b) { int c = a + b; return c; String d = "Some Data"; return d; float f = a/b; return f }

So, how do I get the 3 return values separately?

all the values are of different data types.

I've seen this question and this question but couldn't understand properly.

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    create a class which can hold 4 values a,b,c,d. in the function my create an instance of the class and set the values of a,b,c,d and return the object Commented Apr 21, 2014 at 9:05
  • What part of the answers to those linked questions was unclear? Commented Apr 21, 2014 at 9:05
  • You can only return once, and you can't return multiple values. The answers you linked provide solutions. Returning an int[] array or some collection also works. Commented Apr 21, 2014 at 9:06
  • Doing things using an object is more reliable and better anyway. Commented Apr 21, 2014 at 9:07
  • you can also create list<Integer> or map<operation,Integer> and return value. Commented Apr 21, 2014 at 9:08

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any function can only return one value. What you can do is to create an objet containing all your answers and return this object.

class ResultObject { public int c; public int d; public int e; public int f; }

in your function white

public static ResultObject my(int a, int b) { ResultObject resObject = new ResultObject(); resObject.c = a + b; resObject.d = a*b; resObject.e = a-b; resObject.f = a/b; return resObject; }

You can return only one value. You have to make that value to "contain" other values.

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Yes this is the right way. And use of getter methods will be more appreciated in this regard
say I want to access only f..how to do that in my action class?
ResultObject r = my(5, 10); System.out.println(r.f);
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There are two ways.

  1. If you returning uniform values, e.g. hundred values for temperature over a period of time - use arrays.
  2. If values are non-uniform, e.g. first name, last name and age - introduce a new class.

Reason for this is that Java is a strongly-typed programming language. Wanna describe a new data structure - write a new class.

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return array of int.. e.g. int[]...

public static int[] my(int a, int b) { int res[] = new int[4]; int c = a + b; res[0] = c; int d = a * b; res[1] = d; int e = a - b; res[2] = e; int f = a / b; res[3] = f; return res; }
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new int[4] for four values.
you will get indexOutOfBound exception. new int[3]. updated your answer.
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You can try something like this

 public static int[] my(int a, int b) { // use an array to store values int[] arr = new int[4]; int c = a + b; arr[0] = c; int d = a * b; arr[1] = d; int e = a - b; arr[2] = e; int f = a / b; arr[3] = f; return arr; // return values }
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Please check my edit, what to do if the return types are of different data types?
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You can return only one element but the element may be array or list.you may return list of values.(some exercise). I hope this may bring some solution.

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public class DataStorage{ private int a; private String data; private float f; public DataStorage(int a, String data, float f){ this.a = a; this.data = data; this.f = f; } /* standard get/set method. */ } 
 public static DataStorage my(int a, int b) { int c = a + b; String d = "Some Data"; float f = a/b; DataStorage dataStorage = new DataStorage(c,d,f); return dataStorage; }
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