test2.java

统计字符数组中字母

package com.totyuedu.c69.a20080902;

public class Test2 {
    
    public static void main(String[] args) {

        // 对一个字母的字符数组,去除重复字符，并按升序排序
        char[] c = { 'c', 'a', 'f', 'z', 'x', 'a', 'j', 'f', 'p', 'c' };
        int len = c.length;
        char temp;

        // 排序前顺序
        printArray(c);
        // 先对数组排序
        for (int i = 0; i < len; i++) {
            for (int j = i + 1; j < len; j++) {
                if (c[i] > c[j]) {
                    temp = c[j];
                    c[j] = c[i];
                    c[i] = temp;
                }
            }

        }
        // 排序后顺序
        printArray(c);

        // 去除重复
        char cc = c[0];
        System.out.print(cc + ",");
        for (int i = 1; i < len; i++) {
            if (cc != c[i]) {
                cc = c[i];
                System.out.print(cc + ",");
            }
        }
    }

    public static void printArray(char[] c) {
        if (c == null) {
            return;
        }
        for (int i = 0; i < c.length; i++) {
            System.out.print(c[i] + ",");
        }
        System.out.println();
    }
}