关于ArrayList中subList方法的用途及其弊端(或可说为优势)_sublist 谁更占优势

import java.util.ArrayList;
import java.util.List;

/**
 * subList方法,获取当前集合子集
 *
 */
public class SubList {

	public static void main(String[] args) {
		List<Integer> list=new ArrayList<Integer>();
		for(int i=0;i<10;i++){
			list.add(i);
		}
		System.out.println(list);//[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
		List<Integer>subList=list.subList(3, 9);
		System.out.println(subList);//[3, 4, 5, 6, 7, 8]
		//将子集中的每个元素扩大10倍
		for(int i=0;i<subList.size();i++){
			subList.set(i, subList.get(i)*10);
		}
		System.out.println(subList);//[30, 40, 50, 60, 70, 80]
		//sublist取出的子集修改后,会影响原集合元素
		System.out.println(list);//[0, 1, 2, 30, 40, 50, 60, 70, 80, 9]

	}

}
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