Reformat The String
给一个string, 问能不能重组这个string, 让数字和字母间隔分布.
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class Solution { public String reformat(String s) { if(s == null || s.isEmpty()) return s; String characters = ""; String digits = ""; for(char c : s.toCharArray()){ if(Character.isDigit(c)) digits += c; if(Character.isLetter(c)) characters += c; } if(Math.abs(digits.length() - characters.length()) > 1) return ""; if(digits.length() > characters.length()) return getString(characters,digits); return getString(digits,characters); } private String getString(String first, String second){ int i = 0; String result = ""; while(i < first.length()) result += second.charAt(i) + "" + first.charAt(i++); if(i < second.length()) result += second.charAt(i); return result; } } |