How to reverse a string in java

How to reverse a string

If the students are familiar with StringBuilder and StringBuffer, this question is very simple, just reverse() and it’s done, right?

public class ReverseAString {     public static void main(String[] args) {         reverseInputString("沉默王二");     }     private static void reverseInputString(String input) {         StringBuilder sb = new StringBuilder(input);         String result = sb.reverse().toString();         System.out.println(result);     } }

The output result is as follows:

二王murshen

One more thing, StringBuffer and StringBuilder are very similar. The former is synchronized, and all public methods are synchronized. Key Words can be used in multi-threads; the latter is asynchronous and does not have the synchronized keyword, so it has better performance. If there are no concurrency requirements, use StringBuilder.

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