Use Java to display code in a tree structure in text format

The Code is as follows. Output and use of various formats can be derived as needed.

Package test;

Import java. util. arraylist;
Import java. util. List;

Public class folder {
Public folder (String title ){
This. Title = title;
}

Private String title;

Private list <folder> Children = new arraylist <folder> ();

Public void addchild (Folder f ){
Children. Add (f );
}

Public list <folder> getchildren (){
Return children;
}

Public void setchildren (list <folder> Children ){
This. Children = children;
}

Public String gettitle (){
Return title;
}

Public void settitle (String title ){
This. Title = title;
}

Public String tostring (string lftstr, string append ){
Stringbuilder B = new stringbuilder ();
B. append (append + title );
B. append ("\ n ");
If (children. Size ()> 0 ){
For (INT I = 0; I <children. Size ()-1; I ++ ){
B. append (lftstr + children. Get (I). tostring (lftstr + "│", "success "));
}
B. append (lftstr + children. Get (children. Size ()-1). tostring (
Lftstr + "", "success "));

}
Return B. tostring ();

}

Public static void main (string [] ARGs ){
Folder root = new folder ("menu List ");
Folder F1 = new folder ("Start Menu ");
Root. addchild (F1 );
Folder f1_1 = new folder ("program ");
F1.addchild (f1_1 );
Folder f1_1_1 = new folder ("attachment ");
F00001.addchild (f00001_1 );
Folder f000000001_1 = new folder ("Entertainment ");
F000000001.addchild (f000000001_1 );
Folder f000000001_2 = new folder ("Entertainment 2 ");
F000000001.addchild (f000000001_2 );
Folder f1_2 = new folder ("auxiliary tool ");
F1.addchild (f1_2 );
Folder F2 = new folder ("My Documents ");
Root. addchild (F2 );
Folder F3 = new folder ("My documents2 ");
Root. addchild (F3 );

System. Out. println (root. tostring ("",""));
}
}

The running result is as follows:

Menu list
Renewal Start Menu
│ Program
│ Attachment
│ Entertainment
│ Vivo entertainment 2
│ Helper tools
My documents ents
Using my documents2