I'm trying to take the values I have gathered into an ArrayList of Strings and transfer them over into an array of Strings so that I can run the data through an algorithm that accepts arrays. I am able to do this in the main method, though this is not effective because the data must be run through multiple sorting algorithms and so I need to create the array again each time I call the algorithm. I decided to write it into it's own method for efficiency. However, the same exact code throws an error if I place it in a separate method.
Here is the culprit:
public static String[] transferDefs(ArrayList defs){
//Copy ArrayList values into String[] for sorting
String[] a = new String[defs.size()];
for(int i = 0; i < defs.size(); i++){
a[i] = defs.get(i); //THIS LINE CAUSES ERROR
}
return a;
}
I have also tried using the ArrayList.toArray() method rather than a for
loop. The same problem occurs. Any suggestions? Thanks!
Please try the following code:
public static String[] transferDefs(ArrayList<String> defs) {
// Copy ArrayList values into String[] for sorting
String[] a = new String[defs.size()];
for (int i = 0; i < defs.size(); i++) {
a[i] = defs.get(i); // THIS LINE CAUSES ERROR
}
return a;
}
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