# 2022.10.12  
修改UI updatedevice页面<br>
编写服务端datasource接口<br>
### problem
The operator != is undefined for the argument type(s) int,nullJava(536871072)<br>
Before/after modification<br>
public Integer getId() {                     public Integer getId() {
    return id;                 ==>               return id;
}                                            }