Java Help puzzle

[pmrg]

Hi there,

Im stuck on my assigment :s the problem is everything is compiling but the program is not doing anything.
1st I need to call repaint() if slideBlock return true and I don't know how to.

2nd problem not sure if the slideBlock method is 100% right.

boolean slideBlock(int thisCol, int thisRow)
			{
				if(thisCol<0 || thisCol>=empty_col)
					return false;
				if(thisRow<0 || thisRow>=empty_row)
					return false;
				
				
				if ( (Math.abs(thisRow-empty_row) == 1) && (Math.abs(thisCol-empty_col) > 0) || ((Math.abs(thisRow-empty_row) != 1) && (Math.abs(thisCol-empty_col) > 0)) )
			{
				puzzle[empty_col][empty_row] = puzzle[thisCol][thisRow];
				
				control[empty_col][empty_row] = control[thisCol][thisRow];
				puzzle[thisCol][thisRow] = null;
				
				empty_col = thisCol;
				empty_row = thisRow;
				return true;
			}
			else
			{
				return false;
			}

mouse event

public void mouseClicked(MouseEvent event)
	{
		int thisCol = getCol(event.getX());
		int thisRow = getRow(event.getY());
		
		if (buttNum == 1)
			{
				myModel.slideBlock(thisCol,thisRow);
				
			}
		
		System.out.println("you clicked in column " + thisCol + " and Row " + thisRow);

	}

I just posted the 2sections Im stuck in let me know if you need the whole 2 files.

Thanks in advance
Pedro