Eclipse RCP Series 6 Treeview

The use of Treeview is similar to that of tableview. The difference is that the implementation interfaces of contentprovider and labelprovider are different. The following is an example. I believe you can understand it.
Class kindlabelprovider extends labelprovider {
Public String gettext (Object OBJ ){
If (OBJ instanceof kind ){
Return obj. tostring ();
}
Return NULL;
}

Public Image getimage (Object OBJ ){
// String imagekey = isharedimages. img_obj_element;
If (OBJ instanceof kind ){
String imagekey = isharedimages. img_obj_folder;
Platformui. getworkbench (). get1_dimages (). getimage (imagekey );
}
Return NULL;
}
}

Class kindcontentprovider implements istructuredcontentprovider,
Itreecontentprovider {

Public object [] getelements (Object parent ){
If (parent instanceof kind ){
Return getchildren (parent );
}
Return NULL;
}

Public object getparent (Object child ){
If (Child instanceof node ){
Return (node) Child). getparent ();
}
Return NULL;
}

Public object [] getchildren (Object parent ){
If (parent instanceof kind ){
Arraylist children = (kind) parent). getchildren ();

Return children. toarray (new node [children. Size ()]);

}
Return new object [0];
}

Public Boolean haschildren (Object parent ){
If (parent instanceof kind)
Return (kind) parent). haschildren ();
Return false;
}

Public void dispose (){
// Todo auto-generated method stub

}

Public void inputchanged (viewer, object oldinput, object newinput ){
// Todo auto-generated method stub

}
}