[SOLVED] Gravity is colliding with collide detection

Hello, I'm new here.
I'm coding platform game. I had been stuck on collision detection for 3 days, finally I've solved it.
But now I have to pull player down when he doesn't intersect anything. I did it this way:

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Runnable gravity = new Runnable() {
      public void run() {
         while (true) {
            player.y += yspeed;
            collide.gravity();
            repaint();
            try {
               Thread.sleep(10);
            } catch (InterruptedException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
            }
         }
      }
   };

//Gravity method:
   public void gravity() {
      for (int i = 0; i < box.getX().length; i++)
         if (player.getBounds().intersects(box.getBounds(i))
               && game.yspeed != 0) {
            game.yspeed = 0;
            break;
         } else {
            game.yspeed = 1;
         }
   }

And it works well, player is going down and stops when collides. But there's one glitch caused by right-left collision. Player can't move.

check() method:

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   public void check() {
      // collision from right side
      for (int i = 0; i < box.getX().length; i++) {
         if (player.getBounds().intersects(box.getBounds(i))
               && player.xspeed > 0) {
            setLeft(true);
         } else if (!player.getBounds().intersects(box.getBounds(i))
               && player.xspeed < 0) {
            setLeft(false);
         }
         if (player.getBounds().intersects(box.getBounds(i))
               && player.xspeed < 0) {
            setRight(true);
         } else if (!player.getBounds().intersects(box.getBounds(i))
               && player.xspeed > -1) {
            setRight(false);
         }
      }
   }

And methods responsible for movement:

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@Override
   public void keyPressed(KeyEvent e) {
      int key = e.getKeyCode();
      switch (key) {
      case KeyEvent.VK_LEFT:
         left = true;
         game.collide.check();
         move();
         break;
      case KeyEvent.VK_RIGHT:
         right = true;
         game.collide.check();
         move();
         break;
      case KeyEvent.VK_UP:
         y -= 3;
         game.repaint();
         break;
      case KeyEvent.VK_DOWN:
         y += 3;
         game.repaint();
         break;
      default:
         break;
      }
   }

   private void move() {
      if (left) {
         leftSpeed = 1;
         xspeed = 1;
         scroll();
      } else if (right) {
         leftSpeed = 1;
         xspeed = -1;
         scroll();
      }
   }

   public boolean dudeLeftCollision() {
      return game.collide.left;
   }

   public boolean dudeRightCollision() {
      return game.collide.right;
   }

   private void scroll() {
      if (dudeLeftCollision() && !dudeRightCollision()) {
         leftSpeed = 0;
         rightSpeed = -1;
         for (int i = 0; i < game.box.getX().length; i++) {
            game.box.getX()[i] = game.box.getX()[i];
         }
      }
      if (!dudeLeftCollision() && dudeRightCollision()) {
         leftSpeed = 0;
         rightSpeed = 1;
         for (int i = 0; i < game.box.getX().length; i++) {
            game.box.getX()[i] = game.box.getX()[i];
         }
      }
      if (!dudeLeftCollision() && !dudeRightCollision()) {
         for (int i = 0; i < game.box.getX().length; i++) {
            game.box.getX()[i] += xspeed;
         }
      }
      game.repaint();
   }

It's my story. I have to figure out how to code collision-detection gravity-right-left without any glitches.

Hope you help me,
Thank you,
Szinek

[size=5pt]I wonder if my english is very bad.[/size]

Oops, wrong board? I should write this in "Game Mechanics"?