From 81148e884973475b84e5a53ddc072bc3375ae1c0 Mon Sep 17 00:00:00 2001
From: Petr Tsvetkov <petr.tsv@gmail.com>
Date: Mon, 9 Oct 2017 16:44:06 +0300
Subject: [PATCH 1/2] Tasks 8 and 9 done

---
 .../javacourses2016/task8/SolverTask8.java    | 33 +++++++++++++++++--
 .../javacourses2016/task9/SolverTask9.java    | 18 ++++++++--
 2 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/epam/javacourses2016/task8/SolverTask8.java b/src/main/java/com/epam/javacourses2016/task8/SolverTask8.java
index 46a0bfe..c49623b 100644
--- a/src/main/java/com/epam/javacourses2016/task8/SolverTask8.java
+++ b/src/main/java/com/epam/javacourses2016/task8/SolverTask8.java
@@ -1,5 +1,7 @@
 package com.epam.javacourses2016.task8;
 
+import java.util.Stack;
+
 /**
  * Задана строка, возможно содержащая символы '(', ')', '[', ']', '{', '}'.
  * Проверить правильность расстановки скобок.
@@ -15,7 +17,34 @@ public class SolverTask8 {
      * @param string Анализируемая строка.
      * @return true - скобки расставлены верно, иначе - false.
      */
-    public boolean isNormalBrackets(String string) {
-        return false;
+    public boolean isNormalBrackets(String string)
+    {
+        Stack<Character> stack = new Stack<Character>();
+        String open = "([{";
+        String close = ")]}";
+        boolean result = true;
+        for (char chr : string.toCharArray())
+        {
+            if (open.indexOf(chr) != -1)
+            {
+                stack.add(chr);
+            } else if (close.indexOf(chr) != -1)
+            {
+                if (stack.empty() || open.indexOf(stack.lastElement()) != close.indexOf(chr))
+                {
+                    result = false;
+                }
+                if (!stack.empty())
+                {
+                    stack.pop();
+                }
+            }
+        }
+        if (stack.size() > 0)
+        {
+            result = false;
+        }
+
+        return result;
     }
 }
diff --git a/src/main/java/com/epam/javacourses2016/task9/SolverTask9.java b/src/main/java/com/epam/javacourses2016/task9/SolverTask9.java
index 4702747..6bff13d 100644
--- a/src/main/java/com/epam/javacourses2016/task9/SolverTask9.java
+++ b/src/main/java/com/epam/javacourses2016/task9/SolverTask9.java
@@ -1,7 +1,9 @@
 package com.epam.javacourses2016.task9;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.util.HashSet;
+import java.util.Scanner;
 
 /**
  * Задан файл, содержащий английские слова (без знаков препинания).
@@ -9,14 +11,24 @@
  * Слова, отличающиеся только регистром букв, считать одинаковыми.
  * Использовать класс HashSet.
  */
-public class SolverTask9 {
+public class SolverTask9
+{
 
     /**
      * Формирует множество уникальных слов, извлекая их из файла.
+     *
      * @param input Анализируемый файл.
      * @return Множество полученных слов.
      */
-    public HashSet<String> getUniqueWords(File input) {
-        return null;
+    public HashSet<String> getUniqueWords(File input) throws FileNotFoundException
+    {
+        HashSet<String> result = new HashSet<>();
+        Scanner scanner = new Scanner(input);
+        while (scanner.hasNext())
+        {
+            String word = scanner.next().toLowerCase();
+            result.add(word);
+        }
+        return result;
     }
 }

From 00ef8846054cfd3d0de1b2830d57e96fab00f16b Mon Sep 17 00:00:00 2001
From: Petr Tsvetkov <petr.tsv@gmail.com>
Date: Mon, 9 Oct 2017 16:51:22 +0300
Subject: [PATCH 2/2] Tests enabled

---
 .../java/com/epam/javacourses2016/task8/SolverTask8Test.java    | 2 +-
 .../java/com/epam/javacourses2016/task9/SolverTask9Test.java    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/test/java/com/epam/javacourses2016/task8/SolverTask8Test.java b/src/test/java/com/epam/javacourses2016/task8/SolverTask8Test.java
index bea83d6..fcd9f64 100644
--- a/src/test/java/com/epam/javacourses2016/task8/SolverTask8Test.java
+++ b/src/test/java/com/epam/javacourses2016/task8/SolverTask8Test.java
@@ -6,7 +6,7 @@
 
 public class SolverTask8Test {
 
-    @Test(enabled = false, dataProvider = "myString")
+    @Test(enabled = true, dataProvider = "myString")
     public void testIsNormalBrackets(String string, boolean result) throws Exception {
         SolverTask8 solver = new SolverTask8();
         Assert.assertEquals(solver.isNormalBrackets(string), result);
diff --git a/src/test/java/com/epam/javacourses2016/task9/SolverTask9Test.java b/src/test/java/com/epam/javacourses2016/task9/SolverTask9Test.java
index 39cd428..a6fafea 100644
--- a/src/test/java/com/epam/javacourses2016/task9/SolverTask9Test.java
+++ b/src/test/java/com/epam/javacourses2016/task9/SolverTask9Test.java
@@ -11,7 +11,7 @@
 
 public class SolverTask9Test {
 
-    @Test(enabled = false, dataProvider = "text")
+    @Test(enabled = true, dataProvider = "text")
     public void testGetUniqueWords(String fileName, String fileResult) throws Exception {
         SolverTask9 solver = new SolverTask9();
         ClassLoader classLoader = getClass().getClassLoader();