Java判断字符串是否有重复

检测是否重复:

     public static boolean checkDifferent(String iniString) {
         boolean isbool = false;
         char[] chars = iniString.toCharArray();
         for (int i = 0; i < chars.length; i++) {
             for (int j = i + 1; j < chars.length; j++) {
                 if (chars[i] == chars[j]) {
                     isbool = true;
                     return isbool;
                 } else {
                     isbool = false;
                 }
             }
         }
         return isbool;
     }

输出重复:

 public static void repeat_find( String s) {
         for (int i = 0; i < s.length(); i++) {
             char c = s.charAt(i);
             for (int j = i + 1; j < s.length(); j++) {
                 if (s.charAt(j) == c) {
                     System.out.println("找到了重复的字符为：" + c);
                 }
             }
         }
     }