Jframe in how to convert the list into the Object [] [], and how to [a {}, {}] a transformation [{},-CodePudding

How to:

 
[SSSS {sid=6, sname='mechanical', pid=8, pname='project', uid=null, uname='name'}, SSSS {sid=7, sname='1' mechanical, pid=9, pname='1' project, uid=null, uname='1' name}]

Into:

 
[{sid=6, sname='mechanical', pid=8, pname='project', uid=null, uname="name"}, {sid=7, sname='1' mechanical, pid=9, pname='1' project, uid=null, uname='1' name}]

And how to

 
Object [] columnNames={" A ", "B", "C", "D"} 
[SSSS listsj={sid=6, sname='mechanical', pid=8, pname='project', uid=null, uname='name'}, SSSS {sid=7, sname='1' mechanical, pid=9, pname='1' project, uid=null, uname='1' name}]. 
//this is an error: I do not know how to turn, 
Data table=new series (listsj, columnNames);

//this is an error: I do not know how to turn, listsj error
Data table=new series ( listsj columnNames);
The used list. The toArray ();

 Object [] a=listsj. ToArray (); 
System.out.println(a); 
Object [] [] aa=(Object [] []) listsj. ToArray (); 
System. The out. Println (aa);

Error: can't turn the

 the Exception in the thread "is the AWT - EventQueue - 0" Java. Lang. ClassCastException: [Ljava. Lang. Object; always be cast to the [[Ljava. Lang. Object;

Recent test:

 
Object [] a=listsj. ToArray (); 
//System. Out. Println (a); 
Object [] [] aa=new Object [a. ength] []. 
Int j=0; 
for (int i=0; i Aa [I]=(Object []) a, [I]. 
}

Error:

 the Exception in the thread "is the AWT - EventQueue - 0" Java. Lang. ClassCastException: bean. AllShuJu always be cast to [Ljava. Lang. Object;