java-online-course · tregubowww · Jun 6, 2020
diff --git a/src/main/java/com/epam/izh/rd/online/Main.java b/src/main/java/com/epam/izh/rd/online/Main.java
@@ -1,4 +1,19 @@
 package com.epam.izh.rd.online;
 
+import java.io.File;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+
 public class Main {
+    public static void main(String[] args) {
+        BigDecimal bd1 = BigDecimal.valueOf(1);
+        BigDecimal bd2 = BigDecimal.valueOf(3);
+        BigDecimal result = bd1.divide(bd2, 2, BigDecimal.ROUND_HALF_UP);
+        System.out.println(result);
+    }
 }
diff --git a/src/main/java/com/epam/izh/rd/online/repository/SimpleFileRepository.java b/src/main/java/com/epam/izh/rd/online/repository/SimpleFileRepository.java
@@ -1,5 +1,11 @@
 package com.epam.izh.rd.online.repository;
 
+import java.io.*;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
 public class SimpleFileRepository implements FileRepository {
 
     /**
@@ -10,7 +16,21 @@ public class SimpleFileRepository implements FileRepository {
      */
     @Override
     public long countFilesInDirectory(String path) {
-        return 0;
+        long count = 0;
+        File file = new File("src\\main\\resources\\" + path);
+        File[] files = file.listFiles();
+        if (files != null) {
+            for (File f : files
+            ) {
+                if (f.isDirectory()) {
+                    count += countFilesInDirectory(path + "\\" + f.getName());
+                } else {
+                    count++;
+                }
+            }
+        }
+
+        return count;
     }
 
     /**
@@ -21,7 +41,18 @@ public long countFilesInDirectory(String path) {
      */
     @Override
     public long countDirsInDirectory(String path) {
-        return 0;
+        long count = 1;
+        File file = new File("src\\main\\resources\\" + path);
+        File[] files = file.listFiles();
+        if (files != null) {
+            for (File f : files
+            ) {
+                if (f.isDirectory()) {
+                    count += countDirsInDirectory(path + "\\" + f.getName());
+                }
+            }
+        }
+        return count;
     }
 
     /**
@@ -32,7 +63,17 @@ public long countDirsInDirectory(String path) {
      */
     @Override
     public void copyTXTFiles(String from, String to) {
-        return;
+        Path pathFrom = Paths.get("src\\main\\resources\\" + from);
+        try (DirectoryStream<Path> files =  Files.newDirectoryStream(pathFrom)){
+            for (Path path: files
+                 ) {
+                if (path.toString().endsWith(".txt")){
+                    Files.copy(path, Paths.get("src\\main\\resources\\" + to + path.getFileName()));
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 
     /**
@@ -44,7 +85,15 @@ public void copyTXTFiles(String from, String to) {
      */
     @Override
     public boolean createFile(String path, String name) {
-        return false;
+        File file = new File("src\\main\\resources\\" + path);
+        File file2 = new File(file, name);
+        boolean results = false;
+        try {
+            results = (file.mkdir() && file2.createNewFile());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return results;
     }
 
     /**
@@ -55,6 +104,14 @@ public boolean createFile(String path, String name) {
      */
     @Override
     public String readFileFromResources(String fileName) {
-        return null;
+        try (BufferedReader reader = new BufferedReader(new FileReader("src\\main\\resources\\" + fileName))) {
+            StringBuilder sb  = new StringBuilder();
+            while (reader.ready()){
+                sb.append(reader.readLine());
+                return sb.toString();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        } return null;
     }
 }
diff --git a/src/main/java/com/epam/izh/rd/online/service/SimpleBigNumbersService.java b/src/main/java/com/epam/izh/rd/online/service/SimpleBigNumbersService.java
@@ -2,6 +2,8 @@
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
 
 public class SimpleBigNumbersService implements BigNumbersService {
 
@@ -13,7 +15,10 @@ public class SimpleBigNumbersService implements BigNumbersService {
      */
     @Override
     public BigDecimal getPrecisionNumber(int a, int b, int range) {
-        return null;
+        BigDecimal bd1 = BigDecimal.valueOf(a);
+        BigDecimal bd2 = BigDecimal.valueOf(b);
+        BigDecimal result = bd1.divide(bd2, 2, BigDecimal.ROUND_HALF_UP);
+        return result;
     }
 
     /**
@@ -24,6 +29,19 @@ public BigDecimal getPrecisionNumber(int a, int b, int range) {
      */
     @Override
     public BigInteger getPrimaryNumber(int range) {
-        return null;
+        if (range == 1){
+            return BigInteger.valueOf(2);
+        }
+        BigInteger bi  =  BigInteger.valueOf(3);
+        int count = 0;
+        while (true){
+            if (bi.isProbablePrime(100)){
+                count++;
+            }
+            if (count == range){
+                return bi;
+            }
+            bi = bi.add(BigInteger.valueOf(2));
+        }
     }
 }
diff --git a/src/main/java/com/epam/izh/rd/online/service/SimpleDateService.java b/src/main/java/com/epam/izh/rd/online/service/SimpleDateService.java
@@ -1,5 +1,7 @@
 package com.epam.izh.rd.online.service;
 
+import javax.swing.text.DateFormatter;
+import java.text.SimpleDateFormat;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
@@ -14,7 +16,7 @@ public class SimpleDateService implements DateService {
      */
     @Override
     public String parseDate(LocalDate localDate) {
-        return null;
+        return localDate.format(DateTimeFormatter.ofPattern("dd-MM-yyyy"));
     }
 
     /**
@@ -25,7 +27,7 @@ public String parseDate(LocalDate localDate) {
      */
     @Override
     public LocalDateTime parseString(String string) {
-        return null;
+        return LocalDateTime.parse(string, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm"));
     }
 
     /**
@@ -37,7 +39,7 @@ public LocalDateTime parseString(String string) {
      */
     @Override
     public String convertToCustomFormat(LocalDate localDate, DateTimeFormatter formatter) {
-        return null;
+        return localDate.format(formatter);
     }
 
     /**
@@ -47,7 +49,15 @@ public String convertToCustomFormat(LocalDate localDate, DateTimeFormatter forma
      */
     @Override
     public long getNextLeapYear() {
-        return 0;
+        LocalDate localDate = LocalDate.now();
+        while (true){
+            if (localDate.isLeapYear()){
+                break;
+            }
+             localDate = localDate.plusYears(1);
+        }
+
+        return localDate.getYear();
     }
 
     /**
@@ -57,7 +67,8 @@ public long getNextLeapYear() {
      */
     @Override
     public long getSecondsInYear(int year) {
-        return 0;
+        LocalDate localDate = LocalDate.of(year, 1,1);
+        return localDate.lengthOfYear() * 24 * 60 * 60;
     }
 
 

diff --git a/src/main/java/com/epam/izh/rd/online/service/SimpleRegExpService.java b/src/main/java/com/epam/izh/rd/online/service/SimpleRegExpService.java
@@ -1,5 +1,12 @@
 package com.epam.izh.rd.online.service;
 
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 public class SimpleRegExpService implements RegExpService {
 
     /**
@@ -11,7 +18,24 @@ public class SimpleRegExpService implements RegExpService {
      */
     @Override
     public String maskSensitiveData() {
-        return null;
+        StringBuilder sb  = new StringBuilder();
+        try (BufferedReader reader = new BufferedReader(new FileReader("src\\main\\resources\\sensitive_data.txt"))) {
+            while (reader.ready()){
+                sb.append(reader.readLine());
+            }
+
+            Pattern pattern = Pattern.compile(" [\\d]{4} [\\d]{4} [\\d]{4} [\\d]{4} ");
+            Matcher matcher = pattern.matcher(sb.toString());
+            while (matcher.find()){
+                int startIndex = matcher.start();
+                sb.replace(startIndex + 6, startIndex + 15, "**** ****");
+            }
+
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return sb.toString();
     }
 
     /**
@@ -22,6 +46,15 @@ public String maskSensitiveData() {
      */
     @Override
     public String replacePlaceholders(double paymentAmount, double balance) {
-        return null;
+        StringBuilder sb =  new StringBuilder();
+        try (BufferedReader reader = new BufferedReader(new FileReader("src\\main\\resources\\sensitive_data.txt"))) {
+            while (reader.ready()){
+                String str =reader.readLine().replaceAll("\\$\\{payment_amount}", String.valueOf((int)(paymentAmount)) );
+                sb.append(str.replaceAll("\\$\\{balance}", String.valueOf((int)balance)));
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return sb.toString();
     }
 }
diff --git a/src/main/java/com/epam/izh/rd/online/service/SimpleTextService.java b/src/main/java/com/epam/izh/rd/online/service/SimpleTextService.java
@@ -13,7 +13,7 @@ public class SimpleTextService implements TextService {
      */
     @Override
     public String removeString(String base, String remove) {
-        return null; //TODO
+        return base.replaceAll(remove, "");
     }
 
     /**
@@ -24,7 +24,7 @@ public String removeString(String base, String remove) {
      */
     @Override
     public boolean isQuestionString(String text) {
-        return false; //TODO
+        return text.endsWith("?");
     }
 
     /**
@@ -35,7 +35,12 @@ public boolean isQuestionString(String text) {
      */
     @Override
     public String concatenate(String... elements) {
-        return null; //TODO
+        StringBuilder sb  = new StringBuilder();
+        for (String str : elements
+             ) {
+            sb.append(str);
+        }
+        return sb.toString(); //TODO
     }
 
     /**
@@ -47,7 +52,14 @@ public String concatenate(String... elements) {
      */
     @Override
     public String toJumpCase(String text) {
-        return null; //TODO
+        StringBuilder sb = new StringBuilder();
+        char[] array = text.toLowerCase().toCharArray();
+        for (int i = 0; i < array.length-1; i+=2) {
+            sb.append(array[i]);
+            sb.append(String.valueOf(array[i+1]).toUpperCase());
+
+        }
+        return sb.toString(); //TODO
     }
 
     /**
@@ -59,6 +71,13 @@ public String toJumpCase(String text) {
      */
     @Override
     public boolean isPalindrome(String string) {
-       return false; //TODO
+        String str = string.replaceAll("\\s", "").toLowerCase();
+        if (str == null)return false;
+        StringBuilder sb = new StringBuilder(str);
+        if (sb.reverse().toString().equals(str) && str !="" ){
+            return true;
+        }else {
+            return false; //TODO
+        }
     }
 }
diff --git a/src/main/resources/testDirCreateFile/newFile.txt b/src/main/resources/testDirCreateFile/newFile.txt