So sánh tốc độ chạy của Vector và ArrayList trong Java

Vector - ArrayList "currentTimeMillis"

import java.util.*; /**  * This test program compares performance of Vector versus ArrayList  * @author www.codejava.net  *  */ public class CollectionsThreadSafeTest {     public void testVector() {         long startTime = System.currentTimeMillis();         Vector<Integer> vector = new Vector<>();         for (int i = 0; i < 10_000_000; i++) {             vector.addElement(i);         }         long endTime = System.currentTimeMillis();         long totalTime = endTime - startTime;         System.out.println("Test Vector: " + totalTime + " ms");     }     public void testArrayList() {         long startTime = System.currentTimeMillis();         List<Integer> list = new ArrayList<>();         for (int i = 0; i < 10_000_000; i++) {             list.add(i);         }         long endTime = System.currentTimeMillis();         long totalTime = endTime - startTime;         System.out.println("Test ArrayList: " + totalTime + " ms");     }     public static void main(String[] args) {         CollectionsThreadSafeTest tester = new CollectionsThreadSafeTest();         tester.testVector();         tester.testArrayList();     } }

Output:

1 2	Test Vector: 9266 ms Test ArrayList: 4588 ms