csdn_strive的博客

public class ArrayList<E> extends AbstractList<E> implements List<E>, RandomAccess, Cloneable, java.io.Serializable{ private static final long serialVersionUID = 8683452581122892189L; /** * Default initial capacity.

纯Java基础写登录注册public class Register { public static void main(String[]args){ Scanner sc=new Scanner(System.in);//将形参实参化 register(sc);//调用注册的方法 } public static void register(Scanner sc){//用户注册方法 String registerPhone="";//将形参实参化 Stri