Математическо състезание

package Zadachi;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JLabel;

public class Mat {

    private JFrame frame;
    private JTextField textField;

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

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

    /**
     * Initialize the contents of the frame.
     */
    private void initialize() {
        frame = new JFrame();
        frame.setTitle("\u041C\u0430\u0442\u0435\u043C\u0430\u0442\u0438\u0447\u0435\u0441\u043A\u043E \u0441\u044A\u0441\u0442\u0435\u0437\u0430\u043D\u0438\u0435");
        frame.setBounds(100, 100, 710, 332);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(null);

        textField = new JTextField();
        textField.setBounds(80, 96, 86, 20);
        frame.getContentPane().add(textField);
        textField.setColumns(10);

        final DefaultListModel<String> points = new DefaultListModel<String>();
        final DefaultListModel m1 = new DefaultListModel();
        final DefaultListModel m2 = new DefaultListModel();
        final DefaultListModel m3 = new DefaultListModel();

        JList list1 = new JList(m1);
        list1.setBounds(244, 65, 133, 156);
        frame.getContentPane().add(list1);

        JList list2 = new JList(m2);
        list2.setBounds(399, 66, 124, 156);
        frame.getContentPane().add(list2);

        JList list3 = new JList(m3);
        list3.setBounds(533, 68, 133, 156);
        frame.getContentPane().add(list3);

        JButton btnNewButton = new JButton("Резултат");
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int br=Integer.parseInt(textField.getText());
                int t=0; int avg=0, sum = 0;

                for (int i = 1; i < br+1; i++) {
                    t=Integer.parseInt(JOptionPane.showInputDialog(null,"Въведете точките на участникa "));
                    if (t<0||t>100) {
                        JOptionPane.showConfirmDialog(null,"Некоректни данни");
                        i--;
                        continue;
                    }
                    sum+=t;
                    points.addElement(Integer.toString(t));
                }
                avg=sum/br;
                for (int i = 0; i < br; i++) {
                    if (Integer.parseInt(points.getElementAt(i))<avg) {
                        m1.addElement(points.getElementAt(i));
                    }
                    if (Integer.parseInt(points.getElementAt(i))==avg) {
                        m2.addElement(points.getElementAt(i));
                    }

                    if (Integer.parseInt(points.getElementAt(i))>avg) {
                        m3.addElement(points.getElementAt(i));
                    }
                }
            }
        });
        btnNewButton.setBounds(493, 253, 154, 23);
        frame.getContentPane().add(btnNewButton);

        JLabel lblNewLabel = new JLabel("Въведете броя на участниците");
        lblNewLabel.setBounds(23, 66, 176, 19);
        frame.getContentPane().add(lblNewLabel);

        JLabel lblNewLabel_1 = new JLabel("Под средното ниво");
        lblNewLabel_1.setBounds(244, 45, 124, 14);
        frame.getContentPane().add(lblNewLabel_1);

        JLabel lblNewLabel_2 = new JLabel("средното ниво");
        lblNewLabel_2.setBounds(397, 45, 126, 14);
        frame.getContentPane().add(lblNewLabel_2);

        JLabel lblNewLabel_3 = new JLabel("Над средното ниво");
        lblNewLabel_3.setBounds(530, 45, 136, 14);
        frame.getContentPane().add(lblNewLabel_3);
    }
}