java.util.ArrayList类的get(int index) 方法返回此列表中指定位置的元素。
import java.util.ArrayList; public class ArrayListDemo { public static void main(String[] args) { ArrayList<Integer> arrlist = new ArrayList<Integer>(5); arrlist.add(15); arrlist.add(22); arrlist.add(30); arrlist.add(40); for (Integer number : arrlist) { System.out.println("Number = " + number); } int retval=arrlist.get(3); System.out.println("Retrieved element is = " + retval); } }
输出结果
Number = 15 Number = 22 Number = 30 Number = 40 Retrieved element is = 40