leetcode557反轉字串中的單詞 III
思路:按空格拆分單詞存成string[ ],存成StringBuffer呼叫reverse(),注意:stringbuffer要用tostring方法變成string類
class Solution {
public String reverseWords(String s) {
String[] word=s.split(" ");
String newword="";
for(int i=0;i<word.length;i++){
word[i]=new StringBuffer(word[i]).reverse().toString();
newword=newword+" "+word[i];
}
return newword.trim();
}
}
也可以自己寫一個單詞的反轉
public static void main(String[] args) {
String s="let me fly";
System.out.println(reverseWords(s));
}
public static String reverseWords(String s) {
String[] word=s.split(" ");
String newword="";
for(int i=0;i<word.length;i++){
newword=reverseWord(word[i])+" "+newword;
}
return newword;
}
public static String reverseWord(String s) {
String newstring="";
for(int i=0;i<s.length();i++) {
newstring=s.charAt(i)+newstring;//charAt來完成單詞反轉
}
return newstring;
}