How to use List within javaFX(*.fx) script?

Question

How to use java.util.List within javaFX(*.fx) script?
The following is my code in Java
PDBFileReader pdbreader = new PDBFileReader();
          pdbreader.setPath("/Path/To/PDBFiles/");
          pdbreader.setParseSecStruc(true);// parse the secondary structure information from PDB file
          pdbreader.setAlignSeqRes(true);  // align SEQRES and ATOM records
          pdbreader.setAutoFetch(true);    // fetch PDB files from web if they can't be found locally
          try{
               Structure struc = pdbreader.getStructureById(code);
               System.out.println("The SEQRES and ATOM information is available via the chains:");
               int modelnr = 0 ; // also is 0 if structure is an XRAY structure.
               List<Chain> chains = struc.getChains(modelnr);
               for (Chain cha:chains){
                    List<Group> agr = cha.getAtomGroups("amino");
                    List<Group> hgr = cha.getAtomGroups("hetatm");
                    List<Group> ngr = cha.getAtomGroups("nucleotide");
                    System.out.print("chain: >"+cha.getName()+"<");
                    System.out.print(" length SEQRES: " +cha.getLengthSeqRes());
                    System.out.print(" length ATOM: " +cha.getAtomLength());
                    System.out.print(" aminos: " +agr.size());
                    System.out.print(" hetatms: "+hgr.size());
                    System.out.println(" nucleotides: "+ngr.size()); 
          } catch (Exception e) {
               e.printStackTrace();
          }The following is my code in JavaFX(getting errors)
var loadbtn:SwingButton = SwingButton{
    text:"Load"
    action: function():Void{
        var pdbreader = new PDBFileReader();
        var structure = null;
        try{
            structure = pdbreader.getStructure(filepath.text);
            List<Chain> chains = structure.getChains(0);
            foreach (Chain cha in chains){
                    List < Group > agr = cha.getAtomGroups("amino");
                    List < Group > hgr = cha.getAtomGroups("hetatm");
                    List < Group > ngr = cha.getAtomGroups("nucleotide");
        } catch (e:IOException) {
            e.printStackTrace();
    };I'm using Netbeans 6.5 with JavaFX
(PDBFileReader, Chain, Structure etc are classes from my own package, already added to the library folder under the project directory)
Simply put, How to use List and Foreach in JavaFX?

Answer 1

We can not use Java Generics syntax in JavaFX. But we can use Java Collection classes using the keyword 'as' for type-casting.
e.g.
import java.util.LinkedList;
import java.util.List;
import javafx.scene.shape.Rectangle;
var outerlist : List = new LinkedList();
var innerlist : List = new LinkedList();
innerlist.add(Rectangle{
    width: 10 height:10});
innerlist.add(Rectangle{
    width: 20 height:20});
outerlist.add(innerlist);
for (inner in outerlist) {
    var list : List = inner as List;
    for (element in list) {
        var rect : Rectangle = element as Rectangle;
        println("(width, height)=({rect.width}, {rect.height})");
}