java制作带界面的聊天工具

package com.FakeQQ.entity;
import java.util.Date;
public class Message {
  //需要序列化发送，所以要继承Serializable接口
    private int id;
    private String content;
    private int sender;
    private int receiver;
    private Date sendTime;
    private Date receiveTime;
    private int state;
    private int ip;
    public int getIp() {
      return ip;
    }
    public void setIp(int ip) {
      this.ip = ip;
    }
    public int getId() {
      return id;
    }
    public void setId(int id) {
      this.id = id;
    }
    public String getContent() {
      return content;
    }
    public void setContent(String content) {
      this.content = content;
    }
    public int getSender() {
      return sender;
    }
    public void setSender(int sender) {
      this.sender = sender;
    }
    public int getReceiver() {
      return receiver;
    }
    public void setReceiver(int receiver) {
      this.receiver = receiver;
    }
    public Date getSendTime() {
      return sendTime;
    }
    public void setSendTime(Date sendTime) {
      this.sendTime = sendTime;
    }
    public Date getReceiveTime() {
      return receiveTime;
    }
    public void setReceiveTime(Date receiveTime) {
      this.receiveTime = receiveTime;
    }
    public int getState() {
      return state;
    }
    public void setState(int state) {
      this.state = state;
    }
  }

package com.FakeQQ.entity;
import java.util.Date;
public class User {
    //这叫实体bin
    private int qqNumber;
    private String qqName;
    private String qqPassword;
    private Date registTime; //注册时间
    private String sex;
    private String introduce; //个人简介
    private String ip;
    public int getQqNumber() {
      return qqNumber;
    }
    public void setQqNumber(int qqNumber) {
      this.qqNumber = qqNumber;
    }
    public String getQqName() {
      return qqName;
    }
    public void setQqName(String qqName) {
      this.qqName = qqName;
    }
    public String getQqPassword() {
      return qqPassword;
    }
    public void setQqPassword(String qqPassword) {
      this.qqPassword = qqPassword;
    }
    public Date getRegistTime() {
      return registTime;
    }
    public void setRegistTime(Date registTime) {
      this.registTime = registTime;
    }
    public String getSex() {
      return sex;
    }
    public void setSex(String sex) {
      this.sex = sex;
    }
    public String getIntroduce() {
      return introduce;
    }
    public void setIntroduce(String introduce) {
      this.introduce = introduce;
    }
    public String getIp() {
      return ip;
    }
    public void setIp(String ip) {
      this.ip = ip;
    }
  }