return two variables from one method

Question

How to write the following code correctly?

public String toString(int[] position, int xOffset, int yOffset) {
    String postn = String.format(\"[%d,%d]\", posit         


        

Answer 1

There are four method which I can think of to implement this scenario:

1. Using a class

Create a class with having all the attributes which you want to return, in your case it can be

public class Sample {
   private String postn;
   private String movm;
   public String getPostn() {
        return postn;
   }
   public void setPostn(String postn) {
    this.postn = postn;
   }
   public String getMovm() {
       return movm;
   }
   public void setMovm(String movm) {
       this.movm = movm;
   }    
}

and change your method to include this class's object and set the values in these attributes. Change the return type of the method to Class name e.g. Sample

public Sample toString(int[] position, int xOffset, int yOffset) {
    String postn = String.format("[%d,%d]", position[0], position[1]);
    String movm = String.format("[%d,%d]", xOffset, yOffset);
    Sample obj = new Sample();
    obj.setPostn(postn);
    obj.setMovm(movm);
    return obj;
}

2. Using an array

Change the method to return String array and store the values in that array:

public String[] toString(int[] position, int xOffset, int yOffset) {
    String postn = String.format("[%d,%d]", position[0], position[1]);
    String movm = String.format("[%d,%d]", xOffset, yOffset);
    String arr[] = new String[2];
    arr[0] = postn;
    arr[1] = movm;
    return arr;
}

3. Using javatuples

You can read details at link http://www.javatuples.org/

4. By delimiting Data

You can use some delimiter if you are sure about the data in the variables. But this will require one spiting with the delimiter, when you want to use these values.

public String toString(int[] position, int xOffset, int yOffset) {
    String postn = String.format("[%d,%d]", position[0], position[1]);
    String movm = String.format("[%d,%d]", xOffset, yOffset);
    return postn+"~"+movm;
}