NullPointerException help needed

[katenka5]

I am getting a NullPointerException error and I cannot see where it is. It points to line 19 but I can't find what's wrong.

import java.awt.*;
import java.lang.Object;

public class Algorithm {

    public static void main (String args[]) {
        
    int deletedLines = 0;
    
    Label place[][];
                
    place = new Label[9][9];
    int counter=1;
    for (int i=0; i<9; i++)
    {
            for (int j=0; j<9; j++)
            {
            place[i][j].setText(&quot;aa&quot;);
            }
        }
    
        
    // HORIZONTAL LINES SEARCH

    for (int i=0; i<9; i++)
    {
            for (int j=0; j<5; j++)
        {
            if (place[i][j].getText() == place[i][j+1].getText())
            {
                counter++; //counter = 2 here
                if (place[i][j+1].getText() == place[i][j+counter].getText())
                {
                    counter++; //counter = 3 here
                    if (place[i][j+counter].getText() == place[i][j+counter+1].getText())
                    {
                        counter++; //counter = 4 here
                        if (place[i][j+counter].getText() == place[i][j+counter+1].getText())
                        {
                            counter++; //counter = 5 here
                            // call the DeleteFromBoard function here
                            deletedLines++;
                            System.out.println(deletedLines);                            
                        }
                        else counter=1;
                    }
                }
            }
        }
    }
    System.out.println(&quot;\n\n End of Program&quot;);
    
    
    }
    
}

 

[wushutwist]

You are never creating your Labels before trying to access them. Change your first for loop to look like this:

for (int i=0; i<9; i++) {
  for (int j=0; j<9; j++) {
    place[i][j] = new Label();
  }
}

 

[wayne2004]

Thanks Pete,

I have try to debug the code and find that the NullPointerException is most likely incurred by the InputStream and OutputStream, Since I found that when I try to close them , the same error appears, It seems that I have something wrong with the declaration of the In (inputStream) and Out (outputStream) . But I cannot spot it out as I just actually follow the procedures decribed in my textbook to create an inputStream and outputStream for socket TCP communication. I really can't figure it out ... :<

Thanks for note anyway