Field

package com.vladislav;

// Import libraries for create UI, event and I/O
import javax.imageio.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.File;

// Field contain player, background, etc.
public class Field extends JPanel {
    // Image and x-coordinate for player
    private Image background, player;
    public int x = 400;
    private int hard;
    private Prize[] prize;


    public Field(int hard) {
        this.hard = hard;

        // Timer for update prizes
        Timer timerUpdate = new Timer(3000, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                updateStart();
            }
        });

        // Timer for FPS and start him
        Timer timer = new Timer(50, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                repaint();
            }
        });

        timer.start();
        timerUpdate.start();

        // Load image
        prize = new Prize[7];
        try {
            background = ImageIO.read(new File("background.jpg"));
            player = ImageIO.read(new File("head.jpg"));

            for (int i = 0; i < 7; i++)
                prize[i] = new Prize(ImageIO.read(new File("prize" + i + ".png")));
        } catch (Exception e) {
            System.out.print("Downloading error!");
            System.exit(1);
        }
    }

    private void updateStart() {
        int count = 0;

        for (int i = 0; i < 7; i++) {
            if (prize[i].activity == false && count < hard) {
                prize[i].start();
                break;
            } else
                count++;
        }
    }

    // Draw graphics
    public void paintComponent(Graphics graph) {
        super.paintComponent(graph);

        // First - background, second - player
        graph.drawImage(background, 0, 0, 800, 600, null);
        graph.drawImage(player, x, 320, null);

        for (int i = 0; i < 7; i++)
            prize[i].draw(graph);
    }
}