GUI update+Exception Handling

Author: Dev-eloperr

src/com/company/Main.java

@@ -3,8 +3,8 @@
 public class Main {
     static int[][] sudoku_array = new int[9][9];
     public static void main(String[] args) {
-        guiController gui = new guiController();
-        gui.setVisible(true);
+        guiController gui = new guiController();//Initializes program
+        gui.setVisible(true);//sets the GUI as visible
     }
 }
 class solver{

src/com/company/guiController.java

@@ -7,20 +7,25 @@
 import java.io.IOException;
 
 class guiController extends JFrame {
-
-    private JPanel grid = new JPanel(new GridLayout(9, 9));
+/*
+This class handle GUI related functions and also allows GUI refresh whenever any move is taken by AI
+ */
+    private JPanel grid = new JPanel(new GridLayout(9, 9)); //Grid layout
     private JPanel buttons = new JPanel(new GridLayout(2, 1));
-    private JTextField[][] fieldArray = new JTextField[9][9];
+    private JTextField[][] fieldArray = new JTextField[9][9]; //array of fields for easy extraction
 
-    private sudokuInitializer sud = new sudokuInitializer();
+    private sudokuInitializer sud = new sudokuInitializer(); //initializes array from file
     private int flag;
 
     guiController() {
-        flag = chooseInputStream();
-        guiInit();
+        flag = chooseInputStream(); //choose input method
+        guiInit();//Initializes GUI
         //sud.printArray();
     }
-
+/*
+Function to display GUI for the user to choose input method method
+File or Manual
+ */
     private int chooseInputStream() {
         String[] options = new String[]{"File", "Manual"};
         int response = JOptionPane.showOptionDialog(null, "Choose one way", "",
@@ -30,13 +35,15 @@ private int chooseInputStream() {
         if (response == 0) {
             try {
                 sud.fileInput();
-            } catch (IOException e) {
-                e.printStackTrace();
+            } catch (Exception e) {
+                JOptionPane.showMessageDialog(null,"Critical Error");
             }
         }
         return response;
     }
-
+/*
+Initializes GUI with the given content from the array
+ */
     private void guiInit() {
         for (int i = 0; i < 9; i++) {
             for (int j = 0; j < 9; j++) {
@@ -65,39 +72,48 @@ private void guiInit() {
 
         }
         add(grid);
-        JButton solve = new JButton("Solve");
+        JButton solve = new JButton("Solve");//Button to compute
         solve.setBorder(null);
         solve.setBackground(Color.white);
         buttons.add(solve);
         buttons.add(new JLabel());
         buttons.setBackground(Color.white);
         add(buttons, BorderLayout.SOUTH);
-        solve.addActionListener(e -> {
-            if (flag != 0)
-                getText();
-            sud.printArray();
-            solve.setEnabled(false);
+        solve.addActionListener(e -> { //If the button is pressed
+            if (flag != 0) {
+                try {
+                    getText(); //takes in text from the GUI
+                    sud.printArray(); //debugging purpose
+                    solve.setEnabled(false);//cell value becomes fixed
+                } catch (Exception ex) {
+                    JOptionPane.showMessageDialog(null,"Invalid Input");//Throws error if the input is invalid
+                }
+            }
         });
-
+        //Basic Frame parameters are set below this
         setSize(400, 500);
-        //setVisible(true);
+        //setVisible(true);//done in Main function
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setLocationRelativeTo(null);
     }
-
-    private void getText() {
+/*
+takes in valid input and sets the GUI cells as non editable
+ */
+    private void getText() throws Exception{
         String temp;
         for (int i = 0; i < 9; i++) {
             for (int j = 0; j < 9; j++) {
                     temp = fieldArray[i][j].getText();
                     if (!temp.equals("")) {
-                        Main.sudoku_array[i][j] = Integer.parseInt(temp);
-                        fieldArray[i][j].setEditable(false);
+                            Main.sudoku_array[i][j] = sud.checkValidInput(temp); //throws exception
+                            fieldArray[i][j].setEditable(false);
                     }
             }
         }
     }
-
+/*
+Refreshes the GUI whenever AI makes some changes
+ */
     void refreshGUI(){
         for (int i = 0; i < 9; i++) {
             for (int j = 0; j < 9; j++) {

src/com/company/sudokuInitializer.java

@@ -1,12 +1,23 @@
 package com.company;
 
 import javax.swing.*;
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileReader;
-import java.io.IOException;
+import java.io.*;
 
 class sudokuInitializer {
+    /*
+    Function to check whether the input given via file or manually is valid or not
+    Thorws exception for Invalid Input
+     */
+    int checkValidInput(String input) throws Exception{
+        int n = Integer.parseInt(input+"");
+        if (n<10 && n>-1)
+            return n;
+        else throw new Exception();
+    }
+    /*
+    Function to print content of the array
+    Used for debugging situations
+     */
     void printArray(){
         System.out.println("Printing...");
         for (int i=0;i<9;i++) {
@@ -15,33 +26,38 @@ void printArray(){
                 System.out.print(Main.sudoku_array[i][j] + " ");
         }
     }
+    /*
+    Takes input from file using Jfilechooser, and the input from the file is inserted in the array
+    While inserting, it checks for valid input as well
+     */
     void fileInput() throws IOException {
-        System.out.println("opening Jfilechooser");
-        //JFrame f = new JFrame("Choose a file");
         JFileChooser fileChooser = new JFileChooser("D:\\Windows\\Documents");
         int result = fileChooser.showOpenDialog(null);
         if (result == JFileChooser.APPROVE_OPTION) {
             File selectedFile = fileChooser.getSelectedFile();
-            BufferedReader br = new BufferedReader(new FileReader(selectedFile));
+            BufferedReader br = new BufferedReader(new FileReader(selectedFile));//reads the file
 
-            StringBuilder st = new StringBuilder();
+            StringBuilder st = new StringBuilder(); //  To store Extracted string
             String stt;
             int i=0;
-            while (((stt = br.readLine())) != null){
+            while (((stt = br.readLine())) != null){ //while file has content
                 st.insert(0,stt);
                 for (int j=0;j<st.length();j++){
-                        Main.sudoku_array[i][j] = Integer.parseInt(st.charAt(j)+"");
-                    //System.out.print(i+","+j+":"+Main.sudoku_array[i][j]+"  ");
+                    try {
+                        Main.sudoku_array[i][j] = checkValidInput(st.charAt(j)+""); //checks valid input, catches exception
+                    }catch (Exception E){
+                        JOptionPane.showMessageDialog(null,"Error in extracting data from file\nExiting...");
+                        System.exit(1);
+                    }
                 }
                 i++;
-                //System.out.println();
                 st.delete(0,st.length());
             }
         }
     }
     /*
 
-    //NOTE : Class only to be used in catastrophic situations only
+    //NOTE : Method only to be used in catastrophic situations only, used to take in console input
     void manualInput(){
         String[] str = new String[9];
         Scanner input = new Scanner(System.in);