Return an array of Pairs which have the same length as the input array of Strings. (Java)

Return an array of Pairs which have the same length as the input array of
Strings. (Java)

I want to create a class that would return an array of pairs that have the
same length as the input array of strings. In addition, the pair should
have the first letter of the string and length of the string.
for example; create(new String[] {"clue", "yay", "neon", "halala"}) should
return the array of Pairs {['c',4],['y',3],['n',4],['h',6]}
So, my input and output would both be arrays. But the output has to be in
the form of a pair. Here's what i tried: import java.util.Arrays;
public class Couple {
public static Couple[] create(String[] source){
for (int i = 0; i < source.length; i++) {
System.out.print("["+","+source.length+"]") ;
}
return null;
}
public static void main(String[] args) {
System.out.println(Arrays.toString(create(new String[] {"clue",
"yay", "neon", "halala"})));
}
}
as it's obvious there are a few errors+ i dont want it to return null. But
just for the sake of testing this code, i had to do it. Any ideas?