Thread: Platform game player doesn't respond to keyboard

I started learning java, and tried to make a game, i almost finished it but then i realized that it doesn't work, so i copied the project and started dumping code from my game to find what did i do wrong, but i just cant figure it out. Here is the main class:

import javax.swing.JFrame;
 
public class Main extends JFrame {
 
	//	KONSTRUKTOR
	public Main() {
		super("Plavko glupavko");
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(800, 600);
		setResizable(false);
		setVisible(true);
 
		add(new Igra());
	}
 
	//	MAIN METOD
	public static void main(String[] args) {
		new Main();
	}
}

here is igra class:

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
 
import javax.swing.JPanel;
import javax.swing.Timer;
 
 
public class Igra extends JPanel implements ActionListener {
 
	private Timer tajmer;
	private Tabla tabla;
	private Igrac igrac;
 
	private int igracV;
	private int igracDx;
 
	//	KONSTRUKTOR
	public Igra() {
		setSize(800, 600);
		setBackground(Color.WHITE);
		addKeyListener(new Slusalac());
		setFocusable(true);
 
		tabla = new Tabla(1);
		igrac = tabla.getIgrac();
 
		igracV = 2;
		igracDx = 0;
 
		tajmer = new Timer(50, this);
		tajmer.start();
	}
 
	//	ISCRTAVANJE
	public void paint(Graphics g) {
		super.paint(g);
 
		//	Igrac
		g.drawImage(igrac.getSlika(), igrac.getX(), igrac.getY(), null);
 
		Toolkit.getDefaultToolkit().sync();
		g.dispose();
	}
 
	//	GLAVNA PETLJA
	public void actionPerformed(ActionEvent e) {
		pomeriIgracaX();
 
		repaint();
	}
 
	//	Kretanje igraca
	public void pomeriIgracaX() {
		int duhx = igrac.getXBezPomeraja() + igracDx;
		igrac.setX(duhx);
	}
 
 
	//	KLASA ZA TASTATURU
	private class Slusalac extends KeyAdapter {
		public void keyPressed(KeyEvent e) {
			int kod = e.getKeyCode();
			//	pomeraj desno
			if (kod == KeyEvent.VK_RIGHT) {
				igracDx = igracV;
			}
			//	pomeraj levo
			if (kod == KeyEvent.VK_LEFT) {
				igracDx = -igracV;
			}
		}
		public void keyReleased(KeyEvent e) {
			int kod = e.getKeyCode();
			if (kod == KeyEvent.VK_RIGHT) {
				if (igracDx > 0)
					igracDx = 0;
			}
			if (kod == KeyEvent.VK_LEFT) {
				if (igracDx < 0)
					igracDx = 0;
			}
		}
	}
}

here is tabla class:

import java.awt.Image;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
 
 
public class Tabla {
	private Image pozadina;
	//	ove liste ce da sadrze objekte
	private Igrac igrac;
 
	public Tabla(int tabla) {
		Scanner s;
 
		String imefajla = "table/tabla"+tabla+".tbl";
		File fajl = new File(imefajla);
 
 
		try {
			s = new Scanner(fajl);
			int brreda = 0;
			while (s.hasNextLine()) {
				String red = s.nextLine();
				for (int i = 0; i < red.length(); i++) {
					if (red.charAt(i) == 'i') {
						igrac = new Igrac(i, brreda);
					}
				}
				brreda++;
			}
			s.close();
		} catch (FileNotFoundException e) {}
	}
 
	//	GETERI
 
	public Igrac getIgrac() {
		return igrac;
	}
}

and here is igrac class:

import java.awt.Image;
import java.awt.Rectangle;
 
import javax.swing.ImageIcon;
 
 
public class Igrac {
	private Image slika;
	private final int SIRINA = 30;
	private final int VISINA = 30;
	private int x;
	private int y;
 
	//	pomeraj za kameru
	public static int kpx = 0;
	public static int kpy = 0;
 
	//	KONSTRUKTOR
	public Igrac(int x, int y) {
		this.x = x * 30;
		this.y = y * 30;
		String fajl = "slike/igrac.png";
		slika = new ImageIcon(fajl).getImage();
	}
 
	//	GETERI
	public Image getSlika() {
		return slika;
	}
 
	public Rectangle getGranice() {
		return new Rectangle(x, y, SIRINA, VISINA);
	}
 
	public int getXBezPomeraja() {
		return x;
	}
 
	public int getYBezPomeraja() {
		return y;
	}
 
	public int getX() {
		return x + kpx;
	}
 
	public int getY() {
		return y + kpy;
	}
 
	//	SETERI
	public void setX(int x) {
		this.x = x;
	}
 
	public void setY(int y) {
		this.y = y;
	}
}

Did you ever have a Key Listener?

Also, I'm not very familiar with those and could only possibly do things that weren't combinations, like Shift+F or something.

Yes, as you can see in Igra class i added key listener and made a private class (Slusalac) to serve as one, when i create Igrac object directly in my Igra class it all works, but when i create Igrac object within the Tabla class and then pass it to Igra class it doesn't work. I tried debugging but i get no errors.

Yes that's it, requestFocus() did it. Thank you i would never figure this out by myself.