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;    }  }