Complete

pom.xml

@@ -7,6 +7,18 @@
     <groupId>io.zipcoder</groupId>
     <artifactId>collections</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 
     <dependencies>
         <dependency>

src/main/java/io/zipcoder/ParenChecker.java

@@ -1,4 +1,57 @@
 package io.zipcoder;
 
+import java.util.Stack;
+
 public class ParenChecker {
+
+    private String sentence = "";
+
+    static boolean isMatchingPair(char character1, char character2)
+    {
+        if (character1 == '(' && character2 == ')')
+            return true;
+        else if (character1 == '{' && character2 == '}')
+            return true;
+        else if (character1 == '[' && character2 == ']')
+            return true;
+        else if (character1 == '<' && character2 == '>'){
+            return true;
+        }
+        else if (character1 == '\"' && character2 == '\"'){
+            return true;
+        }
+        else if (character1 == '\'' && character2 == '\''){
+            return true;
+        }
+        else
+            return false;
+    }
+
+    public boolean parenChecker(String sentence){
+
+        Stack<Character> stack = new Stack<>();
+        char[] characters = sentence.toCharArray();
+        for (int i = 0; i < characters.length; i++){
+            if (characters[i] == '(' || characters[i] == '{' || characters[i] == '[' ||
+                    characters[i] == '<' || characters[i] == '\"' || characters[i] == '\''){
+                stack.push(characters[i]);
+                continue;
+            }
+            if (characters[i] == ')' || characters[i] == '}' || characters[i] == ']' ||
+                    characters[i] == '>' || characters[i] == '\"' || characters[i] == '\''){
+                if (stack.isEmpty()){
+                    return false;
+                } else {
+                    if (!isMatchingPair(stack.peek(), characters[i]))
+                        return false;
+                    else
+                        stack.pop();
+                }
+            }
+        }
+        if (stack.isEmpty()){
+            return true;
+        }
+        return false;
+    }
 }

src/main/java/io/zipcoder/WC.java

@@ -1,12 +1,14 @@
 package io.zipcoder;
 
+
 import java.io.FileNotFoundException;
 import java.io.FileReader;
-import java.util.Iterator;
-import java.util.Scanner;
+import java.util.*;
 
 public class WC {
     private Iterator<String> si;
+    private LinkedHashMap<String, Integer> wordCount;
+    private String separator = "[^\\w]+";
 
     public WC(String fileName) {
         try {
@@ -15,9 +17,50 @@ public WC(String fileName) {
             System.out.println(fileName + " Does Not Exist");
             System.exit(-1);
         }
+        wordCount = new LinkedHashMap<>();
     }
-
     public WC(Iterator<String> si) {
         this.si = si;
+        wordCount = new LinkedHashMap<>();
+    }
+
+    public void textIterator(){
+        wordCount = new LinkedHashMap<>();
+        while (si.hasNext()){
+            //put all the words in the text into a string[].
+            String[] allTextSeparated = si.next().toLowerCase().split(separator);
+            for (String word : allTextSeparated){
+                if (wordCount.containsKey(word)){
+                    int value = wordCount.get(word) + 1;
+                    wordCount.put(word, value);
+                }
+                else {
+                    wordCount.put(word, 1);
+                }
+            }
+        }
+    }
+    public List <Map.Entry<String, Integer>> sorted(){
+        List<Map.Entry<String, Integer>> sortedMap = new ArrayList<>(wordCount.entrySet());
+        Collections.sort(sortedMap, new Comparator<Map.Entry<String, Integer>>() {
+            @Override
+            public int compare(Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2) {
+                return (o2.getValue()).compareTo(o1.getValue());
+            }
+
+        });
+        for(Map.Entry<String, Integer> entry: sortedMap){
+            System.out.println(entry.getKey() + " : " + entry.getValue());
+        }
+        return sortedMap;
+    }
+    public String toString(){
+       StringBuilder usedForTest = new StringBuilder();
+        for (Map.Entry<String, Integer> entry : sorted()){
+            usedForTest.append(entry.getKey() + " : " + entry.getValue() + "\n");
+        }
+        return usedForTest.toString();
     }
+
+
 }