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Letter frequency (English)Taste of algorithms in JAVA

LetterFrequency (%)
A 8.167%
B 1.492%
C 2.782%
D 4.253%
E 12.702%
F 2.228%
G 2.015%
H 6.094%
I 6.966%
J 0.153%
K 0.772%
L 4.025%
M 2.406%
N 6.749%
O 7.507%
P 1.929%
Q 0.095%
R 5.987%
S 6.327%
T 9.056%
U 2.758%
V 0.978%
W 2.360%
X 0.150%
Y 1.974%
Z 0.074%
Relative letter frequencies (%)

Digraphs

th, er, on, an, re, he, in, ed, nd, ha, at, en, es, of, or, nt, ea, ti, to, it, st, io, le, is, ou, ar, as, de rt, ve

Trigraphs

the, and, tha, ent, ion, tio, for, nde, has, nce, edt, tis, oft, sth, men

Code

    /**
     * Prints out frequencies of input characters (in percent)
     * @param source input file
     * @param encoding encoding of the file
     */
    public static void count(File source, String encoding) throws UnsupportedEncodingException, IOException{
        BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(source), encoding));
        
        TreeMap<Character, Integer> occurences = new TreeMap<Character, Integer>();

        String s = null;
        int counter = 0;
        while((s = reader.readLine())!= null){
            for(int i = 0; i < s.length(); i++){
                counter++;
                Character curr = (Character) s.charAt(i);
                if(occurences.get(curr) == null){
                    occurences.put(curr, new Integer(1));
                } else {
                    occurences.put(curr, occurences.get(curr).intValue() + 1);
                }
            }
        }

        for(Character ch : occurences.keySet()){
            System.out.println(ch.toString() + ": " + (occurences.get(ch).intValue()/(double)counter * 100));
        }
    }

Sources

  • LEWAND, Robert. Cryptological mathematics. [s.l.] : The Mathematical Association of America, 2000. 199 p. ISBN 0-88385-719-7.







INFO WEB s.r.o.

Company INFO WEB s.r.o. offers development of systems, GIS, presentations and interactive maps, using the microcontrollers from the IoT (Tnternet of Things) technology. Beside this on PROGRAMMING-ALGORITHMS.NET we publish some of the algorithms, which helps to solve some of the spatial analysis and spatial problems, conversion of coordinate systems and helps to solve standard computing operations.

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