FileAnalysis.java

package com.example.FileAnalysis;

// Program to provide simple text analysis on a chosen file
// Filler code by Mr. David

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;
import javax.swing.filechooser.FileNameExtensionFilter;

public class FileAnalysis {
    private final int WIDTH = 600, HEIGHT = 600;
    private String content;

    // return an array of size 26, where each entry in the array is the
    // frequency of the corresponding letter (the first value represents
    // the frequency of 'a', the second 'b', and so on
    private int[] calcFrequencies() {
        int numOfLetters[] = new int[26];
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) <= 'z' && content.charAt(i) >= 'a'){
                numOfLetters[content.charAt(i) - 97]++;
            }
            if (content.charAt(i) <= 'Z' && content.charAt(i) >= 'A'){
                numOfLetters[content.charAt(i) - 65]++;
            }
        }
        return numOfLetters;
    }

    // returns the number of words in the file
    private int numWords() {
        int numOfWords = 1;
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) == ' '){
                numOfWords++;
            }
            if (content.charAt(i) == ','){
                numOfWords++;
            }
            if (content.charAt(i) == '.' && content.charAt(i-1) == '.'){
                numOfWords++;
            }
            if (content.charAt(i) == '!'){
                numOfWords++;
            }
            if (content.charAt(i) == '?'){
                numOfWords++;
            }
            if (content.charAt(i) == '"'){
                numOfWords++;
            }
            if (content.charAt(i) >= 48 && content.charAt(i) <= 57){
                numOfWords++;
            }
        }
        return numOfWords;
    }

    // returns the number of lines in the file
    private int numLines() {
        int numOfLines = 1;
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) == '\n'){
                numOfLines++;
            }
        }
        return numOfLines;
    }

    // returns the longest word in the file
    private String longestWord() {
        int longestLength = 0;
        String word = "";
        for (int i = 0; i <= content.length() - 1; i++){
            for (int j = i + 1; j <= content.length() - 1; j++){
                if (!Character.isLetter(content.charAt(j))){
                    if (j - i - 1 > longestLength){
                        longestLength = j - i - 1;
                        word = content.substring(i, j);
                    }
                    i = j + 1;
                }
            }
        }
        return word;
    }

    // returns the most common letter in the file
    private char mostCommonLetter() {
        int numOfLetters[] = new int[26];
        int common = numOfLetters[0];
        int commonPos = 0;
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) <= 'z' && content.charAt(i) >= 'a'){
                numOfLetters[content.charAt(i) - 97]++;
            }
            if (content.charAt(i) <= 'Z' && content.charAt(i) >= 'A'){
                numOfLetters[content.charAt(i) - 65]++;
            }
        }
        for (int i = 0; i <= 25; i++){
            if (numOfLetters[i] > common){
                common = numOfLetters[i];
                commonPos = i;
            }
        }
        return (char)(commonPos + 97);
    }

    // returns the most common word in the file
    private String mostCommonWord() {
        int numOfWords = 1;
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) == ' '){
                numOfWords++;
            }
            if (content.charAt(i) == ','){
                numOfWords++;
            }
            if (content.charAt(i) == '.' && content.charAt(i-1) == '.'){
                numOfWords++;
            }
            if (content.charAt(i) == '!'){
                numOfWords++;
            }
            if (content.charAt(i) == '?'){
                numOfWords++;
            }
            if (content.charAt(i) == '"'){
                numOfWords++;
            }
            if (content.charAt(i) >= 48 && content.charAt(i) <= 57){
                numOfWords++;
            }
        }
        String a[] =  new String[numOfWords * 2];
        int pos = 0;
        int num = 0;
        int max = 0;
        String word = "";
        for (int i = 0; i <= content.length() - 1; i++){
            for (int j = i + 1; j <= content.length() - 1; j++){
                if (!Character.isLetter(content.charAt(j))){
                    a[pos] = content.substring(i, j);
                    pos++;
                    i = j + 1;
                }
            }
        }
        for (int i = 0; i <= numOfWords - 1; i++){
            num = 0;
            for (int j = 0; j <= numOfWords - 1; j++){
                if (a[i].equals(a[j])){
                    num++;
                }
            }
            if (num > max && a[i].length() >= 4){
                max = num;
                word = a[i];
            }
        }
        return word;
    }

    // returns the ten most common words (of length > 5) in
    // the file, in order from most common to least common
    private String[] tenMostCommonWords() {
        int numOfWords = 1;
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) == ' '){
                numOfWords++;
            }
            if (content.charAt(i) == ','){
                numOfWords++;
            }
            if (content.charAt(i) == '.' && content.charAt(i-1) == '.'){
                numOfWords++;
            }
            if (content.charAt(i) == '!'){
                numOfWords++;
            }
            if (content.charAt(i) == '?'){
                numOfWords++;
            }
            if (content.charAt(i) == '"'){
                numOfWords++;
            }
            if (content.charAt(i) >= 48 && content.charAt(i) <= 57){
                numOfWords++;
            }
        }
        String a[] =  new String[numOfWords * 2];
        int pos = 0;
        int num = 0;
        int min = 0;
        int minPos = 1;
        int max[] = new int[10];
        boolean noDup = true;
        String word[] = new String[10];
        for (int i = 0; i <= content.length() - 1; i++){
            for (int j = i + 1; j <= content.length() - 1; j++){
                if (!Character.isLetter(content.charAt(j))){
                    a[pos] = content.substring(i, j);
                    pos++;
                    i = j + 1;
                }
            }
        }
        for (int i = 0; i <= numOfWords - 1; i++){
            num = 0;
            min = max[0];
            minPos = 0;
            noDup = true;
            for (int j = 0; j <= numOfWords - 1; j++){
                if (a[i].equals(a[j])){
                    num++;
                }
            }
            for (int k = 0; k <= 9; k++){
                if (max[k] < min){
                    min = max[k];
                    minPos = k;
                }
            }
            for (int k = 0; k <= 9; k++){
                if (a[i].equals(word[k])){
                    noDup = false;
                }
            }
            if (num > min && a[i].length() >= 5 && noDup == true){
                word[minPos] = a[i];
                max[minPos] = num;
            }
        }
        return word;
    }

    // returns the longest sentence in the file
    private String longestSentence() {
        int longestLength = 0;
        String sentence = "";
        for (int i = 0; i <= content.length() - 1; i++){
            for (int j = i + 1; j <= content.length() - 1; j++){
                if (content.charAt(j) == '.' || content.charAt(j) == '!' || content.charAt(j) == '?'){
                    if (j - i - 1 > longestLength){
                        longestLength = j - i - 1;
                        sentence = content.substring(i, j);
                    }
                    i = j + 1;
                }
            }
        }
        return sentence;
    }

    // returns the percent of characters in the file that are vowels.
    // cast the decimal to a string, shorten it to a few decimal
    // points, then add a % sign to the end
    private String percentVowels() {
        String percent = "";
        double vowels = 0;
        double sum = 0;
        int numOfLetters[] = new int[26];
        for (int i = 0; i <= content.length()-1; i++){
            if (content.charAt(i) <= 'z' && content.charAt(i) >= 'a'){
                numOfLetters[content.charAt(i) - 97]++;
            }
            if (content.charAt(i) <= 'Z' && content.charAt(i) >= 'A'){
                numOfLetters[content.charAt(i) - 65]++;
            }
        }
        for (int i = 0; i <= 25; i++){
            if (i == 0 || i == 4 || i == 8 || i == 14 || i == 20){
                vowels += numOfLetters[i];
            }
            sum += numOfLetters[i];
        }
        percent += vowels / sum * 100;
        return percent.substring(0, 5) + "%";
    }



    // ***** STOP HERE ***** //


    public FileAnalysis() {

        JFileChooser fc = new JFileChooser();
        File workingDirectory = new File(System.getProperty("user.dir"));
        fc.setCurrentDirectory(workingDirectory);
        fc.showOpenDialog(null);
        File f = fc.getSelectedFile();
        if (f == null)
            System.exit(-1);

        try {
            BufferedReader in = new BufferedReader(new FileReader(f));

            for (int letter = in.read(); letter != -1; letter = in.read()) {
                content += (char)letter;
            }
            in.close();
            content = content.toLowerCase();
        } catch (FileNotFoundException e1) {
            System.out.println("File not found :(");
            return;
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        // the main container
        JFrame frame = new JFrame();
        frame.setSize(WIDTH, HEIGHT);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // the inner container
        JPanel panel = new JPanel();
        BoxLayout boxlayout = new BoxLayout(panel, BoxLayout.Y_AXIS);
        panel.setLayout(boxlayout);
        panel.setBorder(BorderFactory.createTitledBorder("File Analysis"));

        // text container
        JTextArea displayarea = new JTextArea();
        displayarea.setEditable(false);

        // create and add listeners to the buttons
        JButton freqButton = new JButton("Letter Frequencies");
        freqButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "";
                int[] freq = calcFrequencies();
                output = "\n   Letter frequencies in " + f.getName()+": \n";
                for (int i = 0; i < freq.length; i++)
                    output += "\n      "+(char)(i+97)+": " +freq[i];
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton numWordsButton = new JButton("Number of Words in File");
        numWordsButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Number of words in "+f.getName()+": " + numWords();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton numLinesButton = new JButton("Number of Lines in File");
        numLinesButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Number of lines in "+f.getName()+": " + numLines();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton mostCommonLetterButton = new JButton("Most Common Letter");
        mostCommonLetterButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Most common letter in "+f.getName()+": "+mostCommonLetter();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton mostCommonWordButton = new JButton("Most Common Word");
        mostCommonWordButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Most common word in "+f.getName()+": "+mostCommonWord();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton tenMostCommonButton = new JButton("10 Most Common Words");
        tenMostCommonButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "";
                String[] common = tenMostCommonWords();
                output += "\n   10 most common words in "+f.getName()+
                        " (of at least length 5):\n";
                for (int i = 0; i < common.length; i++)
                    output += "\n      "+(i+1)+". "+common[i];
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton longestSentenceButton = new JButton("Longest Sentence");
        longestSentenceButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Longest sentence in "+f.getName()+":";
                output += "\n\n      "+longestSentence();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });
        JButton clearButton = new JButton("Clear");
        clearButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                displayarea.setText("\n   Currently working in "+f.getName()+".");
            }
        });

        JButton percentVowelsButton = new JButton("Percent Vowels");
        percentVowelsButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Vowels make up "+percentVowels() +
                        " of letters in "+f.getName()+".";
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });

        JButton longestWordButton  = new JButton("Longest Word");
        longestWordButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String output = "\n   Longest Word: "+longestWord();
                displayarea.setText(displayarea.getText()+"\n"+output+"\n");
            }
        });

        // add a scroll bar to the text area
        JScrollPane scroll = new JScrollPane (displayarea);
        scroll.setVerticalScrollBarPolicy(
                ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        scroll.setPreferredSize(new Dimension(400,475));
        panel.add(scroll);

        // create three containers for the three button rows
        JPanel innerPanel2 = new JPanel(),innerPanel3 = new JPanel(),
                innerPanel4 = new JPanel();
        innerPanel2.add(freqButton);
        innerPanel2.add(numWordsButton);
        innerPanel2.add(numLinesButton);
        innerPanel3.add(mostCommonLetterButton);
        innerPanel3.add(mostCommonWordButton);
        innerPanel3.add(tenMostCommonButton);
        innerPanel4.add(percentVowelsButton);
        innerPanel4.add(longestSentenceButton);
        innerPanel4.add(longestWordButton);
        innerPanel4.add(clearButton);
        panel.add(innerPanel2);
        panel.add(innerPanel3);
        panel.add(innerPanel4);

        // final setup on the frame
        frame.add(panel);
        frame.setLocationRelativeTo(null);
        frame.setResizable(false);
        frame.setVisible(true);

        // beginning text display
        displayarea.setText("\n   Currently working in "+f.getName()+".");
    }

    public static void main(String[] args) {
        new FileAnalysis();
    }
}