JFrame: JButtons in a grid

[jackal]

Hi, I am trying to make a checkers game using a JFrame. So far I was able to display each space on the checker board as a JButton. But when I try to remove all the buttons from the grid and put new ones in by using the removeAll method it only displays a transparent JFrame.

Here is my code:

public class BoardOperations 
{
	
	public static void initializeBoard(JFrame checkerBoard, ImageIcon blkBackground, ImageIcon redBackground, ImageIcon whiteChkr, ImageIcon redChkr, boolean chkrBlockWhite, boolean chkrBlockRed)
	{
		checkerBoard.setSize(1000,1000);
		checkerBoard.setTitle("CheckerBoard");
		checkerBoard.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        int row = 8;
 
        int col = 8;
 
        Container pane = checkerBoard.getContentPane();
        pane.setLayout(new GridLayout(row,col, 1, 1));
        
        int count = 0;
         
        //Populates the board with spaces and checkers
        for (int x = 1; x <=(row*col); x++)
        {
           int altr = 0;
           altr = (x-1) % col;
           altr += (x-1) / col;
           //Inserts red spaces in checker board
           if (altr % 2 == 0)
           {
              pane.add(new JButton(redBackground));
           }
           //Inserts black spaces or checkers in checker board	
           else
           {
            	//Inserts white checkers
            	if(chkrBlockWhite == true && count < 12)
         	   		pane.add(new JButton(whiteChkr));
            	
            	//Inserts red checkers
         	    else if(chkrBlockRed == true && count > 19)
         	   		pane.add(new JButton(redChkr));
         	    //Inserts black spaces
         	    else
                   pane.add(new JButton(blkBackground));
            	count++;
               
            }
 
          
           
            
        }
       
        checkerBoard.setVisible(true);
        
    }
	public static void movePiece(JFrame checkerBoard, ImageIcon blkBackground, ImageIcon redBackground, ImageIcon whiteChkr, ImageIcon redChkr, boolean chkrBlockWhite, boolean chkrBlockRed)
	{
		checkerBoard.removeAll();
		
		Container pane = checkerBoard.getContentPane();
        pane.setLayout(new GridLayout(8,8, 1, 1));
		for (int x = 1; x <=(8*8); x++)
        {
           int altr = 0;
           altr = (x-1) % 8;
           altr += (x-1) / 8;
           //Inserts red spaces in checker board
           if (altr % 2 == 0)
           {
              pane.add(new JButton(redBackground));
           }
           //Inserts black spaces or checkers in checker board	
           else
           {
            	//Inserts white checkers
            	if(chkrBlockWhite == true)
         	   		pane.add(new JButton(whiteChkr));
            	
            	//Inserts red checkers
         	    else if(chkrBlockRed == true)
         	   		pane.add(new JButton(redChkr));
         	    //Inserts black spaces
         	    else{
                   pane.add(new JButton(blkBackground));
            	   
         	    }
               
            }
         }
		
	}
}

[jackal]

Never mind I figured out my problem, I was using removeAll() on the JFrame when I should have been using it on the Container.

[camickr]

Generally you need to tell the Container that you have finished adding/removing components from it so all the components can be layed out properly. One way to do this is to use:

validate();
repaint();

on the content pane.