public class Test {    public static void main(String[] args) {        String[] array = {"D","B","A","C"};        //sort(array);        shortStr("BDAC");    }    /**     * 方法 一：数组排序返回字符串     * @param array     */    public static void sort(String[] array) {        int len = array.length;        String temp = null;        for (int i = 0; i < len - 1; i++) {            for (int j = 0; j < len - 1 - i; j++) {                if ((array[j].compareTo(array[j + 1])) > 0) {                    temp = array[j];                    array[j] = array[j + 1];                    array[j + 1] = temp;                }            }        }                StringBuffer s=new StringBuffer();        for (String str : array) {            s.append(str);        }        System.out.println("结果是："+s);    }    /**     * 方法二：字符串排序返回字符串     */    public static void shortStr(String str){                char[] c =str.toCharArray();        char temp = ‘_‘;        for (int i = 0; i < c.length; i++) {            for (int j = 0; j < c.length-i-1; j++) {                if (c[j]>c[j+1]) {                    temp = c[j];                    c[j] = c[j+1];                    c[j+1]=temp;                }            }        }
　　　　 StringBuffer s = new StringBuffer();        for (int i = 0; i < c.length; i++) {            s.append(c[i]);        }        System.out.println("结果是："+s);    }        /**     * 字符转换     * @param str     * @return     */    public String[] getLongStrings(String str){        String[] strs = str.split("");        String[] ss = new String[strs.length-1];        for (int i = 0; i < ss.length; i++) {            ss[i] = strs[i+1];        }        return ss;    }        public String[] getShotStrings(String str){        char[] cs = str.toCharArray();        String[] ss=new String[cs.length];        for (int i = 0; i < ss.length; i++) {            ss[i] = cs[i]+"";        }        return ss;    }    }