[JAVA] String splicing Efficiency

Source: Internet
Author: User

344. Reverse String

Write a function that takes a string as input and returns the string reversed.

Example:
Given s = "Hello", Return "Olleh".

I wrote a code at the beginning.

class Solution {    public  String reversestring (string s) {        int len = s.length ( );        String ans= "";          for (int i=len-1;i>=0;i--)            ans+ =S.charat (i)        ; return ans;    }}

The last case of the above code did not pass, check the next found that the last cases about more than 42,300 characters

Because I beginner Java, for many details are not very understanding, then looked up some information, and also did some tests, found that compared to StringBuilder

Stitching at 50,000-character levels differs by more than 1600 times in speed. Here is to remind everyone string when using a large number of splicing, as far as possible to replace StringBuilder

[JAVA] String splicing Efficiency

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.