Sum of Ints by merging

The essence: There is a class with int fields (from 1 to infinity). This class has a method that adds these values ​​with another instance of this class. Question: Is it possible to do it somehow more elegantly? Code:

public class SomeClass {
int a = 0;
int b = 0;
int c = 0;
...
 
 
public void mergeValues(final SomeClass other) {
this.a += other.a;
this.b += other.b;
this.c += other.c;
.....
 
return this;
}
}```