userlist.java

来自「企业信息交流系统.,只要用语多家企业或者一家企业有多家分公司间的信息交流」· Java 代码 · 共 36 行

package inc;

import java.util.Vector;
import java.util.Enumeration;

public class UserList {
  private static final UserList userList = new UserList();
  private Vector<String> v;

  private UserList() {
    v = new Vector<String> ();
  }

  public static UserList getInstance() {
    return userList;
  }

  public void addUser(String name) {
    if (name != null)
      v.addElement(name);
  }

  public void removeUser(String name) {
    if (name != null)
      v.remove(name);
  }

  public Enumeration<String> getUserList() {
    return v.elements();
  }

  public int getUserCount() {
    return v.size();
  }
}