import TokenizerProcess.StringTokenizer;
import javax.swing.JOptionPane;

public class ReadFile {
	public static int count = 0;
	public static String[][]file = new String[6][3];
	public void isReadFile(){
		SubjectInput input = new SubjectInput();
			BufferedReader reader = new BufferedReader
			(new FileReader("SubjectFiles/subjects.txt"));
			String line;
			while((line = reader.readLine())!=null){
				StringTokenizer tokenFile = new StringTokenizer(line);
				file[count][0] = tokenFile.nextToken();
				file[count][1] = tokenFile.nextToken();
				file[count][2] = tokenFile.nextToken();
		}catch(Exception e){
			JOptionPane.showMessageDialog(null,"File not found.");
	public static void main (String args[]){


Hello, can someone help me, i dont know what is the problem with this. If i want to output the file[1][1], the output is "null". But if I will use the "sysout" at the isReadFile method, it will output the file[1][1]. I dont know what is the problem. Help. Thank you ahead.

Either make the String array as a member of ReadFile or make the method isReadFile static. Anyways, if your code looks the same way as you have posted, you are missing the invocation of isReadFile in main() which actually initializes the two dimensional String array.

If all you need to do is to read the contents of the file once, there is no need to maintain static member variables or impart any state to the ReadFile class; just make it a utility method and you should be good to go.