摘要:
以下代码对其执行后,NumberList里的元素依次为: List<Integer> NumberList = new ArrayList<Integer>(); NumberList.add(2); NumberList.add(4); NumberList.add(1); NumberList. 阅读全文
摘要:
public class Test { public static void changeStr(String str) { str = "welcome"; } public static void main(String[] args) { String str = "1234"; change 阅读全文