this is my code, but its is not able to read the input file, i have not idea why.

public class Assignmentl public static void main(String[] args) BufferedReader br = null; tr FileInputstream fstream = new FileInputStream("assignment1.txt ") CircularLinkedList circularLinkedList- new CircularLinkedList); br new BufferedReader(new InputStreamReader(fstream)); StringBuilder sb = new StringBuilder(); string line = br.readLine(); int i = 1; while (null != line) { sb.append(line); sb.append (System.LineSeparator)); executeCommand(line,circularLinkedList); line = br . readLine(); catch (IOException e) { e.printStackTrace); Finally{ try if (br != null) { br.clos) catch (IOException e) { e.printstackTrace)