// date:17.3.31

// author: linyang <linyang@xiaomi.com>

// 统计字符串中每个字母

import javax.swing.JOptionPane;

public class CountEachLetter {

public static void main(String[] args) {

String s = JOptionPane.showInputDialog("enter a string");

int[] counts = countLetters(s.toLowerCase());

String output = "";

for (int i = 0; i < counts.length; i++) {

if (counts[i] != 0) {

output += (char)('a' + i) + " appeas " +

counts[i] + ((counts[i] == 1)? " time\n" : " times\n");

}

}

JOptionPane.showMessageDialog(null, output);

}

public static int[] countLetters(String s) {

int[] counts = new int[26];

for (int i = 0; i < s.length(); i++) {

if (Character.isLetter(s.charAt(i))) {

counts[s.charAt(i) - 'a']++;

}

}

return counts;

}

}