聊天室系统（JSP，课程设计）

package chatroom; public class Online { private String uName[]; private String uNickName[]; private String uSex[]; public String room[]; int total = 0; public Online() { uName=new String[50]; uNickName=new String[50]; uSex=new String[50]; room=new String[50]; total=0; } public void add(String UserName,String NickName,String Sex) { if(total<50) { uName[total]=UserName; uNickName[total]=NickName; uSex[total]=Sex; total++; } } public void delete(String UserName) { for(int i=0;i<total;i++) if(uName[i].equals(UserName)) { for(int j=i;j<total-1;j++) { uName[j]=uName[j+1]; uNickName[j]=uNickName[j+1]; uSex[j]=uSex[j+1]; } total--; } } public int find(String UserName) { for(int i=0;i<total;i++) { if(uName[i].equals(UserName)) return(i+1); if(i==(total-1)) return 0; } return 0; } public String get_uName(int num) { if(num<50) return uName[num]; return null; } public String get_uNickName(int num) { if(num<50) return uNickName[num]; return null; } public String get_uSex(int num) { if(num<50) return uSex[num]; return null; } public int get_total() { return total; } public String get_room(int num) { return room[num]; } public String set_room(String str,int num) { return this.room[num]=str; } }