java - How to avoid index out p bound exception from arraylist -


i trying substring of arraylist ,but when list empty getting index out of bound exception code

if(interviewtimingtofrom1.size()>0) {     (int = 0; < interviewtimingtofrom1.size(); i++) {                string str = interviewtimingtofrom1.get(i).substring(0,                                  interviewtimingtofrom1.get(i).length() - 3);         subinterviewtiming1.add(str);     } }  if (interviewtimingtofrom2.size()>0) {     (int = 0; < interviewtimingtofrom2.size(); i++) {         string str = interviewtimingtofrom2.get(i).substring(0,                                interviewtimingtofrom2.get(i).length() - 3);         subinterviewtiming2.add(str);     } }

here when interviewtimingtofrom2 , interviewtimingtofrom1 empty getting index out of bound how solve

try this, may avoid exception. 

string str = interviewtimingtofrom2.get(i).substring(0, interviewtimingtofrom2.get(i).length() > 3 ? interviewtimingtofrom2.get(i).length() - 3 : interviewtimingtofrom2.get(i).length());

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