Tutorial: 344. Reverse String

阿新 • • 發佈：2019-01-31

題目

將輸入的字串反過來，再輸出

演算法

新建一個StringBuilder
把原來的字串裡面的字（char），倒著用charAt（）方法倒著讀出來，新增到這個StringBuilder
把這個StringBuilder用toString（）方法轉成字串

程式碼

private String reverseString(String s){
    StringBuilder sb=new StringBuilder();
    for(int i=s.length()-1;i>=0;i--) {
        sb.append(s.charAt(i));
    }
    return 
 sb.toString();
}

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Tutorial: 344. Reverse String

題目

演算法

程式碼

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