dynamically chane icons on label

[MEENAKSHI123]

I am doing a project on Nqueens and i need dynamically show the movement of queens but the screen shows only the final o/p and not the proc ess of how is it working!How can i visualize each step!
i am giving a part of that code

//THIS FOR CREATING CHESS BOARD
p3.setLayout(new GridLayout(i,i));
                     gbl=new GridBagConstraints();
                    for(int m=0;m<i;m++)
                    {
                        for(int n=0;n<i;n++)
                        {    
                            gbl.gridx=m;
                            gbl.gridy=n;
                            l[m][n]=new JLabel();
                            l[m][n].setOpaque(true);
                            if((m+n)%2==0)
                            {
                                l[m][n].setBackground(Color.black);
                                l[m][n].setIcon(new ImageIcon("wb.jpg"));
                                p3.add(l[m][n],gbl);
                            }
                            else
                            {    l[m][n].setBackground(Color.white);
                                l[m][n].setIcon(new ImageIcon("ww.jpg"));    
                                p3.add(l[m][n],gbl);
                            }
                        }
                    }
//THIS IS TO DYNAMICALLY GENERATE
for(int hh=0;hh<n;hh++)
        {    for(int m=0;m<n;m++)
            {
                if(l[hh][m].getIcon()!=null)
                    l[hh][m].setIcon(null);
 
            }
        }
 
 
        if((k+ii)%2==0)
        {
 
            l[k][ii].setIcon(new ImageIcon("wb.jpg"));
 
            //p3.add(l,gbl);
 
        }
        else
        {
 
            l[k][ii].setIcon(new ImageIcon("ww.jpg"));
 
            //p3.add(l,gbl);
 
        }

[chaarmann]

You can visualize it by using a debugger. In Eclipse switch to the "debug" view, set a breakpoint on line 3, start your program with "run"->"debug" and step through your program line by line.

Another way is to print out the variables in every line
for example with System.out.println("line xx: myVariable=" + myVariable)