Java GUI sloppy after two seconds

Question

I am struggling with Eclipse WindowBuilder GUI. I've made a layout and it does work, but it begins to lag after 2-3 seconds and is horribly slow. I've googled it, found the revalidate(), validate(), update() and stuff like this, but it does pretty the same. Can you please point me out where it gets laggy, hence I don't know what causes me this and I'm confused a lot now.

Source code:

package forum;

import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JSeparator;
import javax.swing.JTextField;
import javax.swing.SwingConstants;

public class ForumView {

private JFrame frame;
private JTextField txtUsr;
private JTextField txtPasswd;
private JSeparator separator;
private JTextField txtUsr_1;
private JTextField txtPasswd_1;
private JButton btnNewButton_1;
private JSeparator separator_1;
private JButton btnNewButton;
private JButton btnNewButton_2;
private JButton btnNewButton_3;
private JButton btnAddPicture;
private JButton btnNewButton_4;
private JButton btnBack;
private JButton btnSortAlphabetically;
private JButton btnNewButton_5;
private JLabel lblNewLabel;


/**
 * Launch the application.
 */
public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        public void run() {
            try {
                ForumView window = new ForumView();
                window.frame.setVisible(true);
                window.frame.update(window.frame.getGraphics());
                window.frame.revalidate();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}

/**
 * Create the application.
 */
public ForumView() {
    initialize();

}

public void redrawMethod() {
    frame.repaint();
    txtUsr.repaint();
    txtPasswd.repaint();
    btnNewButton.repaint();
    separator_1.repaint();
    separator.repaint();

    txtUsr_1.repaint();
    txtPasswd_1.repaint();
    btnNewButton_1.repaint();
    separator_1.repaint();
    btnNewButton.repaint();
    btnNewButton_2.repaint();
    btnNewButton_3.repaint();
    btnAddPicture.repaint();
    btnNewButton_4.repaint();
    btnBack.repaint();
    btnSortAlphabetically.repaint();
    btnNewButton_5.repaint();
    lblNewLabel.repaint();
}

/**
 * Initialize the contents of the frame.
 */
private void initialize() {
    frame = new JFrame();
    frame.setBounds(100, 100, 1318, 814);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.getContentPane().setLayout(null);

    txtUsr = new JTextField();

    txtUsr.setBounds(10, 11, 86, 28);
    frame.getContentPane().add(txtUsr);
    txtUsr.setColumns(10);

    txtPasswd = new JTextField();

    txtPasswd.setBounds(10, 42, 86, 28);
    frame.getContentPane().add(txtPasswd);
    txtPasswd.setColumns(10);

    btnNewButton = new JButton("Login");
    btnNewButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            System.out.println(txtUsr.getText());
        }
    });
    btnNewButton.setBounds(106, 10, 89, 23);
    frame.getContentPane().add(btnNewButton);

    separator = new JSeparator();
    separator.setOrientation(SwingConstants.VERTICAL);
    separator.setBounds(205, 11, 2, 51);
    frame.getContentPane().add(separator);

    txtUsr_1 = new JTextField();
    txtUsr_1.setText("usr");
    txtUsr_1.setBounds(217, 11, 86, 28);
    frame.getContentPane().add(txtUsr_1);
    txtUsr_1.setColumns(10);

    txtPasswd_1 = new JTextField();
    txtPasswd_1.setText("passwd");
    txtPasswd_1.setBounds(217, 42, 86, 28);
    frame.getContentPane().add(txtPasswd_1);
    txtPasswd_1.setColumns(10);

    btnNewButton_1 = new JButton("register");
    btnNewButton_1.setBounds(313, 10, 89, 23);
    frame.getContentPane().add(btnNewButton_1);

    separator_1 = new JSeparator();
    separator_1.setBounds(10, 73, 1282, 2);
    frame.getContentPane().add(separator_1);

    btnNewButton_2 = new JButton("Add topic");
    btnNewButton_2.setEnabled(false);

    btnNewButton_2.setBounds(10, 120, 100, 23);
    frame.getContentPane().add(btnNewButton_2);

    btnNewButton_3 = new JButton("Passwd change");
    btnNewButton_3.setEnabled(false);
    btnNewButton_3.setBounds(10, 154, 100, 23);
    frame.getContentPane().add(btnNewButton_3);

    btnAddPicture = new JButton("Add picture");
    btnAddPicture.setEnabled(false);
    btnAddPicture.setBounds(10, 186, 98, 26);
    frame.getContentPane().add(btnAddPicture);

    btnNewButton_4 = new JButton("Logout");
    btnNewButton_4.setBounds(106, 43, 89, 26);
    frame.getContentPane().add(btnNewButton_4);

    btnBack = new JButton("Back");
    btnBack.setEnabled(false);
    btnBack.setBounds(10, 223, 98, 26);
    frame.getContentPane().add(btnBack);

    btnSortAlphabetically = new JButton("Sort Alphabetically");
    btnSortAlphabetically.setEnabled(false);
    btnSortAlphabetically.setBounds(10, 257, 98, 26);
    frame.getContentPane().add(btnSortAlphabetically);

    btnNewButton_5 = new JButton("Add Comment");
    btnNewButton_5.setEnabled(false);
    btnNewButton_5.setBounds(10, 294, 98, 26);
    frame.getContentPane().add(btnNewButton_5);

    lblNewLabel = new JLabel("No Photo");
    lblNewLabel.setBounds(420, 11, 55, 51);
    frame.getContentPane().add(lblNewLabel);
    frame.validate();
    txtUsr.validate();
    txtPasswd.validate();
    separator.validate();
    txtUsr_1.validate();
    txtPasswd_1.validate();
    btnNewButton_1.validate();
    separator_1.validate();
    btnNewButton.validate();
    btnNewButton_2.validate();
    btnNewButton_3.validate();
    btnAddPicture.validate();
    btnNewButton_4.validate();
    btnBack.validate();
    btnSortAlphabetically.validate();
    btnNewButton_5.validate();
    lblNewLabel.validate();

    }
}

Thanks.

EDIT: Now the "main" GUI works, but everything else is freezing. I used an openfiledialog to open a image file, but that dialog freezes out too. Here is the code I've tried:

btnAddPicture.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            frame.createBufferStrategy(2);
            frame.validate();
            frame.repaint();
            final JFileChooser fc = new JFileChooser();
            //RepaintManager.currentManager(fc).setDoubleBufferingEnabled(true);
             System.out.println(RepaintManager.currentManager(fc).isDoubleBufferingEnabled());
            //returns true
            //fc.repaint();
            // in response to a button click:
            int returnVal = fc.showOpenDialog(frame);

            if (returnVal == JFileChooser.APPROVE_OPTION) {
                File file = fc.getSelectedFile();

            } else {
                System.out.println("Open command cancelled by user.");
            }
        }
    });

EDIT 2: On Linux machine everything works like a charm.

Answer 1

I tested that code, and it works fine for me. The window is opened for about 2 minutes and everything works as it should. When does lag begin? When clicking buttons? Moving the window?