http://stackoverflow.com/questions/14027949/how-do-i-print-all-the-items-within-a-jcombobox

Main.java

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JComboBox;
public class Main {
    public static void main(String[] args){
        JComboBox<String> shapeChoice = new JComboBox<>();
        shapeChoice.addItem("Point");
        shapeChoice.addItem("Square");
        shapeChoice.addItem("Circle");
        shapeChoice.addItem("Doughnut");
        shapeChoice.addItem("Pentagon");
        shapeChoice.addItem("Hexagon");
        JComboBox<String> colourChoice = new JComboBox<>();
        colourChoice.addItem("Blue");
        colourChoice.addItem("Magenta");
        colourChoice.addItem("Red");
        colourChoice.addItem("Bull");
        JComboBox<Integer> sizeChoice = new JComboBox<>();
        sizeChoice.addItem(10);
        sizeChoice.addItem(30);
        sizeChoice.addItem(9000);
        System.out.println(combo2Array(shapeChoice,sizeChoice,colourChoice).toString());
    }
    public static List<ShapeItem> combo2Array(JComboBox<String> shapeCombo,JComboBox<Integer> sizeCombo, JComboBox<String> colourCombo){

        List<ShapeItem> list = new ArrayList<>();
        for(int i=0;i<shapeCombo.getItemCount();i++)
            for(int j=0;j<sizeCombo.getItemCount();j++)
                for(int k=0;k<colourCombo.getItemCount();k++){
                    ShapeItem shape = new ShapeItem(shapeCombo.getItemAt(i), sizeCombo.getItemAt(j), colourCombo.getItemAt(k));
                    list.add(shape);
                }      
        return list;
    }
    public static File folderasHighasSky(File directory){
            File parent = directory.getParentFile();
            if(parent.getName().isEmpty()){
                return directory;
            }
            return folderasHighasSky(parent);
    }

}

ShapeItem.java

public class ShapeItem

{
    public ShapeItem(){
        
    }
    public ShapeItem(String shapeChoose, int size, String colourChoose) {
        this.setSize(size);
        this.setShapeChoose(shapeChoose);
        this.setColourChoose(colourChoose);
    }

    public String getShapeChoose() {
        return shapeChoose;
    }

    public void setShapeChoose(String shapeChoose) {
        this.shapeChoose = shapeChoose;
    }

    public String getColourChoose() {
        return colourChoose;
    }

    public void setColourChoose(String colourChoose) {
        this.colourChoose = colourChoose;
    }

    public int getSize() {
        return size;
    }

    public void setSize(int size) {
        this.size = size;
    }

    private String shapeChoose;
    private String colourChoose;
    private int size;

    public String toString() {
        return "[" +shapeChoose+","+size+","+colourChoose+"]";
    }
}