diff --git a/COMPRESSION/Utilities.java b/COMPRESSION/Utilities.java
new file mode 100644
index 0000000..9d55272
--- /dev/null
+++ b/COMPRESSION/Utilities.java
@@ -0,0 +1,226 @@
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Random;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Utilities {
+
+    public static String genomic_sequence = "";
+    public static List<Integer> position_list = new ArrayList<Integer>();
+
+    public static List<Contig> restList;
+
+    public static String readSequence(String sequenceFileName) throws IOException {
+        System.out.println("READING SEQUENCE...");
+
+        FileInputStream fileInputStream = new FileInputStream(sequenceFileName);
+        DataInputStream dataInputStream = new DataInputStream(fileInputStream);
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(dataInputStream));
+        String line;
+        StringBuilder sequence = new StringBuilder();
+
+        while ((line = bufferedReader.readLine()) != null) {
+            if (!line.startsWith(">")) {
+                sequence.append(line);
+            }
+        }
+        return sequence.toString();
+    }
+
+    public static List<String> readContigs(String contigsFileName) throws IOException {
+        List<String> list = new ArrayList<String>();
+        FileInputStream fileInputStream = new FileInputStream(contigsFileName);
+        DataInputStream dataInputStream = new DataInputStream(fileInputStream);
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(dataInputStream));
+        String line;
+        while ((line = bufferedReader.readLine()) != null) {
+            if (!line.contains("contig")) {
+                list.add(line);
+            }
+        }
+        return list;
+    }
+
+    public static List<Integer> positionsOfPattern(String text, String pattern, double probability) {
+        List<Integer> positions = new ArrayList<Integer>();
+        Pattern p = Pattern.compile(pattern);
+        Matcher m = p.matcher(text);
+        while (m.find()) {
+            positions.add(m.start());
+            /*if (!canNotBeAdded(probability)) {
+                positions.add(m.start());
+            } else {
+                //System.out.println("MISSED...");
+            }*/
+        }
+        return positions;
+    }
+
+    public static int count_occurrences(String text, String pattern) {
+        Pattern p = Pattern.compile(pattern);
+        Matcher m = p.matcher(text);
+        int count = 0;
+        while (m.find()) {
+            count++;
+        }
+        return count;
+    }
+
+    public static boolean canNotBeAdded(double probability) {
+
+        if (probability <= 0.0) {
+            return false;
+        }
+        Random random = new Random();
+        double randomNumber = random.nextDouble();
+        return randomNumber <= probability;
+    }
+
+    public static void writeToDisk(String fileName, String text, boolean append) throws IOException {
+        FileWriter fstream = new FileWriter(fileName, append);
+        BufferedWriter out = new BufferedWriter(fstream);
+        out.write(text);
+        out.close();
+    }
+
+    public static void write(String fileName, String text, boolean append) throws IOException {
+        FileWriter fileWriter = new FileWriter(fileName, append);
+        BufferedWriter out = new BufferedWriter(fileWriter);
+        out.write(text);
+        out.close();
+    }
+
+    public static List<Double> getFragmentSizeList(String sequence, String pattern, double probability, double elongation) throws IOException {
+
+        List<Integer> list = positionsOfPattern(sequence, pattern, probability);
+        position_list.addAll(list);
+
+        if (list.size() <= 1) {
+
+            if (list.size() == 1) {
+                Contig contig = new Contig();
+                contig.setStartingPosition(list.get(0));
+                restList.add(contig);
+            }
+
+            return null;
+        }
+
+        List<Double> fragmentSizeList = new ArrayList<Double>();
+        fragmentSizeList.add((double) (list.get(0) + pattern.length()));
+        if (elongation > 1) {
+            Random random = new Random();
+            for (int i = 1; i < list.size(); i++) {
+                if (random.nextInt(2) == 1) {
+                    double size = list.get(i) - list.get(i - 1);
+                    double increaseBy = size * ((double) random.nextInt((int) elongation)) / 100;
+                    size = size + increaseBy;
+                    fragmentSizeList.add(size);
+                } else {
+                    double size = list.get(i) - list.get(i - 1);
+                    double decreaseBy = size * ((double) random.nextInt((int) elongation)) / 100;
+                    size = size - decreaseBy;
+                    fragmentSizeList.add(size);
+                }
+            }
+        } else {
+            for (int i = 1; i < list.size(); i++) {
+                double size = list.get(i) - list.get(i - 1);
+                fragmentSizeList.add(size);
+            }
+        }
+
+        return fragmentSizeList;
+    }
+
+    public static void createOpMap(String opFileName, List<Double> list) throws IOException {
+        deleteFile(opFileName);
+        StringBuilder text = new StringBuilder();
+        for (int i = 0; i < list.size(); i++) {
+            text.append(String.valueOf(list.get(i).intValue()) + "\n");
+        }
+        writeToDisk(opFileName, text.toString(), false);
+    }
+
+    public static void deleteFile(String fileName) {
+        File file = new File(fileName);
+        if (file.exists()) {
+            file.delete();
+        }
+    }
+
+    public static List<Double> readOpMap(String fileName) throws IOException {
+        List<Double> list = new ArrayList<Double>();
+        FileInputStream fileInputStream = new FileInputStream(fileName);
+
+        DataInputStream dataInputStream = new DataInputStream(fileInputStream);
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(dataInputStream));
+
+        String strLine;
+
+        while ((strLine = bufferedReader.readLine()) != null) {
+            list.add((double) Integer.parseInt(strLine));
+        }
+
+        dataInputStream.close();
+        return list;
+    }
+
+    public static int min(int a, int b, int c) {
+        return (Math.min(Math.min(a, b), c));
+    }
+
+    public static List<String> createContigs(String sequence, int length) throws IOException {
+
+        List<String> contigs = new ArrayList<String>();
+
+        System.out.println("TARGET SIZE: " + sequence.length());
+
+        int parts = sequence.length() / length;
+        String contig = "";
+        int start = 0, end = 0;
+
+        for (int i = 0; i <= parts; i++) {
+            if (i == 0) {
+                end = length;
+                contig = sequence.substring(start, end);
+                contigs.add(contig);
+            } else if (i < parts) {
+                start = end;
+                end = start + length;
+                contig = sequence.substring(start, end);
+                contigs.add(contig);
+            } else {
+                /*start = end;
+                contig = sequence.substring(start);
+                contigs.add(contig);*/
+
+                start = end;
+                contig = sequence.substring(start);
+                contig = contigs.get(contigs.size() - 1) + contig;
+                contigs.set((contigs.size() - 1), contig);
+            }
+        }
+        return contigs;
+    }
+
+    public static void similarityCheck(String fileOne, String fileTwo) throws IOException {
+        String s1 = readSequence(fileOne);
+        List<String> list = readContigs(fileTwo);
+        String s2 = "";
+        for (String string : list) {
+            s2 += string;
+        }
+
+        if (s1.equals(s2)) {
+            System.out.println("HURRAY! SIMILAR...");
+        } else {
+            System.out.println("OH GOD! NOT SIMILAR...");
+        }
+
+        System.out.println(s1.length() + "    " + s2.length());
+    }
+}