import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.Rectangle2D;

import javax.swing.JFrame;
import javax.swing.Timer;

public class Main extends JFrame implements ActionListener , KeyListener{

private static final long serialVersionUID = 3206847208968227199L;

public static int Score = 0;
public static boolean run = true;

Timer tm = new Timer(5 , this);

double velx = 0, vely = 0 ;

int x = 0, y = 0;

public static void setScore(){
    do{
        Score = Score + 1 ;
    }while(run);
}

public void up(){
    vely = -1.5;
    velx =  0;
}

public void down(){
    vely = 1.5;
    velx =  0;
}

public void left(){
    velx = -1.5;
    vely = 0;
}

public void right(){
    velx = 1.5;
    vely = 0;
}

@Override
public void keyTyped(KeyEvent e) {

}

@Override
public void keyPressed(KeyEvent e) {
    int code = e.getKeyCode();

    if(code == KeyEvent.VK_UP){

        if(y <= 20){
            y = 20;
        }else{
            up();
        }
    }
    if(code == KeyEvent.VK_DOWN){

        if(y >= 400){
            y = 460;
        }else{
            down();
        }
    }
    if(code == KeyEvent.VK_LEFT){

        if(x <= 0){
            x = 0;
        }else{
            left();
        }
    }
    if(code == KeyEvent.VK_RIGHT){

        if(x >= 400){
            x = 460;
        }else{
            right();
        }
    }

}

@Override
public void keyReleased(KeyEvent e) {

    int code = e.getKeyCode();

    if(code == KeyEvent.VK_UP){
        velx = 0;
        vely = -0.1;
    }
    if(code == KeyEvent.VK_DOWN){
        velx = 0;
        vely = 0.1;
    }
    if(code == KeyEvent.VK_LEFT){
        velx = -0.1;
        vely = 0;
    }
    if(code == KeyEvent.VK_RIGHT){
        velx = 0.1;
        vely = 0;
    }
}


public void paint(Graphics g){


    super.paintComponents(g);
    Graphics2D g2 = (Graphics2D) g;
    g2.setColor(Color.BLACK);
    g2.fill(new Rectangle2D.Double(x , y , 40 , 40));
    g2.drawString("Score : " + Score, 5 , 10 );
    tm.start();

}

public Main(){
    addKeyListener(this);
    pack();
    setTitle("Game");
    setSize(500, 500);
    setResizable(false);
    setVisible(true);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
}

public static void main(String [] args) {

new Main();

}

@Override
public void actionPerformed(ActionEvent arg0) {
    repaint();
    x += velx;
    y += vely;

}

}