Help with JFrames:Two JFrames dont paint properly

Question

Hello Guys.I am new here and I would like to ask for some help.
I have a problem with me Java application.
My main Class is the MainGUI class which has some selection components and is a JFrame.When the user presses the "proceed" button, it will make a Calculation.class Object to make some calculations.When these are completed, the Calculation class will create a ResultsWindow.class Object which is a new JFrame. The two JFrames (this if type MainGUI and the one of type ResultsWindow) coexist;however they do not show their components properly.What is going on?Can u help me? I am posting some example code:
public class MainGUI extends JFrame implements ActionListener{
public MainGUI() {}
public void actionPerformed(ActionEvent e){
if (e.getSource() == proceedButton) {
Calculator calculatorObj=new Calculator();
if (radioGZIP.isSelected() && radioNone.isSelected()) {
calculatorObj.applyCalculations("NONE","GZIP",filesTableToProcess,targetFolder);}
public static void main(String[] args) {
MainGUI start =new MainGUI();
public class Calculator{
public void applyCalculations(String technique,String algorithm,final String[] filesTable,String targetFolder) {
ResultsWindow resultsWindowObj=new ResultsWindow(technique,algorithm,filesTable,resultTable,resultNCD);
public class ResultsWindow extends JFrame implements ActionListener{
public ResultsWindow(String technique,String algorithm,String[] filesTable,String[][] resultTable,double[] resultNCD) { ...}
I think this is a thread problem...what should I do?The window should repaint everytime I maximize, but it does not...The two JFrames seem to be blocking each other!Help me plz...

Answer 1

Then, my second stab in the dark is:
You don't call revalidate() or validate() on some of their containers after
adding components.
Post the relevant parts of your code or small example code that can reproduce the problem.
See: http://www.physci.org/codes/sscce.jsp