编辑代码

public class Timeroom{
    public static void main(String[] args){
        int datetime=20220630;
        char time;
        char point;
        if(time==null&&point==null){
            System.out.println("您预约的时间为："+datetime+",");
        }
        if(time!=null&&point==null){
            System.out.println("您预约的时间为："+datetime+","+time+",");
        }
        if(time!=null&&point!=null){
            System.out.println("您预约的时间为："+datetime+","+time+","+point+",");
        }    
    }
}