方法remove(int)在Java中做什么？
java.util.ArrayList类的 remove（intindex）方法删除此列表中指定位置的元素。将所有后续元素向左移动（从其索引中减去一个）。
示例
import java.util.ArrayList;
public class ArrayListDemo {
public static void main(String[] args) {
ArrayList<Integer> arrlist = new ArrayList<Integer>(5);
arrlist.add(20);
arrlist.add(15);
arrlist.add(30);
arrlist.add(45);
System.out.println("Size of list: " + arrlist.size());
for (Integer number : arrlist) {
System.out.println("Number = " + number);
}
arrlist.remove(2);
System.out.println("Now, Size of list: " + arrlist.size());
for (Integer number : arrlist) {
System.out.println("Number = " + number);
}
}
}输出结果
Size of list: 4 Number = 20 Number = 15 Number = 30 Number = 45 Now, Size of list: 3 Number = 20 Number = 15 Number = 45