laba_3_4_java

import java.util.Scanner;
import java.lang.String;
import java.io.*;
public class Main {
   private static final Scanner scan = new Scanner(System.in);
   private static final char[] brakes = new char[]{'[', ']', '{', '}', '(', ')'};
   private static final int SQUARE_BRACKET = 0;
   private static final int BRACE = 2;
   private static final int BRACKET = 4;
   private static final int[] counters = new int[6];

   public static void main(String[] args) {
      System.out.println("Check if the given text has a balance of opening and closing brackets.");
      System.out.println("Enter type of input. " + '\n' + "1 is console input, 0 is file input.");
      boolean chose = choose();
      String strInput;
      String path;
      if (chose) {
         System.out.println("Input string:");
         strInput = consoleInputString();
      } else {
         path = inputFilePath();
         strInput = FileInputString(path);
      }
      loop(brakes, counters, strInput);
      System.out.println("Enter type of output. " + '\n' + "1 is console output, 0 is file output.");
      chose = choose();
      if (chose) {
         check(counters);
      } else {
         path = inputFilePath();
         fileOutput(path, counters);
      }
   }

   private static boolean choose() {
      int inputNumber = 0;
      boolean isIncorrect;
      final int MIN_NUM = 0;
      final int MAX_NUM = 1;
      do {
         isIncorrect = false;
         try {
            inputNumber = Integer.parseInt(scan.nextLine());
         } catch (Exception e) {
            isIncorrect = true;
            System.out.println("Please, enter a number.");
         }
         if (!isIncorrect && (inputNumber < MIN_NUM || inputNumber > MAX_NUM)) {
            System.out.println("You are out of input range!:");
            isIncorrect = true;

         }
      } while (isIncorrect);
      if (inputNumber == 1)
         return true;
      else
         return false;
   }

   //console
   private static String consoleInputString() {
      String strInput = "";
      boolean isIncorrect;
      do {
         isIncorrect = false;
         try {
            strInput = scan.nextLine();
         } catch (Exception e) {
            isIncorrect = true;
            System.out.println("Check input data.");
         }
      } while (isIncorrect);
      return strInput;
   }

   static void countBrackets(int j, int i, char[] brakes, int[] counters, String str) {
      if (str.charAt(i) == brakes[j])
         counters[j]++;
      if (str.charAt(i) == brakes[j + 1])
         counters[j + 1]++;
   }

   static void loop(char[] brakes, int[] counters, String str) {
      for (int i = 0; i < str.length(); i++) {
         countBrackets(SQUARE_BRACKET, i, brakes, counters, str);
         if (counters[SQUARE_BRACKET + 1] > counters[SQUARE_BRACKET])
            break;
         countBrackets(BRACE, i, brakes, counters, str);
         if (counters[BRACE + 1] > counters[BRACE])
            break;
         countBrackets(BRACKET, i, brakes, counters, str);
         if (counters[BRACKET + 1] > counters[BRACKET])
            break;
      }
   }

   static void check(int[] counters) {
      if ((counters[SQUARE_BRACKET] == counters[SQUARE_BRACKET + 1]) && (counters[BRACE] == counters[BRACE + 1]) && (counters[BRACKET] == counters[BRACKET + 1]))
         System.out.println("Поздравляю! Баланс есть!");
      else
         System.out.println("Баланса нет.");
   }

   //files
   private static String inputFilePath() {
      String path;
      boolean isIncorrect;
      do {
         isIncorrect = false;
         System.out.println("Input file path:");
         path = scan.nextLine();
         File file = new File(path);
         if (!file.exists()) {
            System.out.println("Wrong way to file.");
            isIncorrect = true;
         }
         if (!file.canRead() && file.exists()) {
            System.out.println("Impossible to read a file.");
            isIncorrect = true;
         }
         if (!file.canWrite() && file.canRead()) {
            System.out.println("Impossible to write a file.");
            isIncorrect = true;
         }
      } while (isIncorrect);
      return path;
   }

   private static String FileInputString(String path) {
      String strInput = "";
      boolean isIncorrect;
      do {
         isIncorrect = false;
         try {
            Scanner fileScanner = new Scanner(new File(path));
            strInput = fileScanner.nextLine();
         } catch (Exception q) {
            isIncorrect = true;
            System.out.println("Check file");
            path = inputFilePath();
         }
      } while (isIncorrect);
      return strInput;
   }

   private static void fileOutput(String path, int[] counters) {
      boolean isIncorrect;
      do {
         isIncorrect = false;
         try {
            FileWriter writer = new FileWriter(path);
            if ((counters[SQUARE_BRACKET] == counters[SQUARE_BRACKET + 1]) && (counters[BRACE] == counters[BRACE + 1]) && (counters[BRACKET] == counters[BRACKET + 1]))
               writer.write(("Congratulations! Balance is exist!"));
            else
               writer.write(("There is no balance there."));
            writer.close();
         } catch (IOException e) {
            isIncorrect = true;
            System.out.println("Mistake of output in file. Input path.");
            path = inputFilePath();
         }
      } while (isIncorrect);
      System.out.println("Successful output in file.");
   }
}