Recommendation 60: Performance considerations, arrays are preferred

Package com.company.section1;


Import java.util.ArrayList;
Import java.util.List;




public class Client {
Number of cycles performed by test performance
private static final int loop_num = 100000;
public static void Main (string[] args) {
Int[] score = new INT[100];
Initializing arrays and lists
list<integer> list = new arraylist<integer> (100);
for (int i=0;i<score.length;i++) {
Score[i] = i;
List.add (i);
}
Test Array Performance
Long begin = System.currenttimemillis ();
for (int i=0;i<loop_num;i++) {
SUM (score);
}
Long end = System.currenttimemillis ();
SYSTEM.OUT.PRINTLN (array) Execution time: + (End-begin) + "MS");

Test List Execution Time
for (int i=0;i<loop_num;i++) {
sum (list);
}
SYSTEM.OUT.PRINTLN (list) Execution time: + (System.currenttimemillis ()-end) + "MS");


}
Sum of pairs of groups
public static int sum (int[] datas) {
int sum = 0;
for (int i=0;i<datas.length;i++) {
Sum +=datas[i];
}
return sum;
}

Sum the list
public static int sum (list<integer> datas) {
int sum = 0;
for (int i=0;i<datas.size (); i++) {
Sum +=datas.get (i);
}
return sum;
}
}