Initial data commit

Task/Letter-frequency/Java/letter-frequency-3.java

@@ -0,0 +1,26 @@
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Arrays;
+
+public class LetterFreq {
+	public static int[] countLetters(String filename) throws IOException{
+		int[] freqs = new int[26];
+		BufferedReader in = new BufferedReader(new FileReader(filename));
+		String line;
+		while((line = in.readLine()) != null){
+			line = line.toUpperCase();
+			for(char ch:line.toCharArray()){
+				if(Character.isLetter(ch)){
+					freqs[ch - 'A']++;
+				}
+			}
+		}
+		in.close();
+		return freqs;
+	}
+	
+	public static void main(String[] args) throws IOException{
+		System.out.println(Arrays.toString(countLetters("filename.txt")));
+	}
+}