java 统计英文字符

import java.util.Arrays;

/*
 * The Associated Press won an award for its series on 
the profiling of Muslims by the New York Police 
Department.
But for the first time since 1977 there was no prize 
for fiction.The Pulitzer panel praised the Patriot-News.
统计出英文字符的个数,打印出出现的次数及字符
打印出出现次数最多的字符及次数
 */
public class temp {
    public static void main(String[] args) {
        String str = "The Associated Press won an award for its series on"
                +"the profiling of Muslims by the New York Police Department."
                +"But for the first time since 1977 there was no prize"
                +"for fiction.The Pulitzer panel praised the Patriot-News.";
        //定义数组存储26个字母
        char[] arr = new char[26];
        int index = 0;
        for(char chars = 'a'; chars <= 'z'; chars++){
            arr[index] = chars;
            index++; 
        }
        System.out.println(Arrays.toString(arr));
        //将字符串中的字母变成小写
        str = str.toLowerCase();
        //定义一个数组存储每个字符出现的次数
        int[] nArr = new int[26];
        for(int i = 0;i < arr.length;i++){
            for(int j = 0;j < str.length();j++){
                if(str.charAt(j) == arr[i]){
                    nArr[i]++;
                }
            }
        }
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i] + "=" +nArr[i]);
        }
        //找出nArr数组中的最大值
        int max = 0;
        for (int i = 0; i < nArr.length; i++) {
            if(nArr[i] > max){
                max = nArr[i];
            }
        }
        System.out.println("输出出先次数最多的元素及次数");
        for (int i = 0; i < nArr.length; i++) {
            if(nArr[i] == max){
                System.out.println(arr[i] + "=" + nArr[i]);
            }
        }
    }
}