题目:
输入:一个字符串(由字母空格组成),一个长度
输出:将所有单词前后位置颠倒,大小写颠倒
例如:
输入:
This is a sample,16
输出:
SAMPLE A IS tHIS
public String trans(String s,int n) {//处理全部是空格的情况if(s.trim().length() == 0) return s;s = s.substring(0,n); //校准s长度if(s.length() ==0) return s;//处理长度为0StringBuilder sb = new StringBuilder();s = changeStr(s); //大小写反转/** 截取末单词置首*/for (int i = s.length()-1; i >= 0; i--) {if(s.charAt(i)==' '){String str = s.substring(i+1);sb.append(str+" ");s=s.substring(0,i);}}sb.append(s);return sb.toString();}//大小写反转类public String changeStr(String s) {StringBuilder sb = new StringBuilder();for (char c : s.toCharArray()) {if (c <= 'z' && c >= 'a') {c = Character.toUpperCase(c);} else if (c <= 'Z' && c >= 'A') {c = Character.toLowerCase(c);}sb.append(c);}return sb.toString();}
如果觉得《单词前后位置颠倒 大小写颠倒》对你有帮助,请点赞、收藏,并留下你的观点哦!