reverse string in java

1public class ReverseString {
2    public static void main(String[] args) {
3        String s1 = "neelendra";
4        for(int i=s1.length()-1;i>=0;i--)
5            {
6                System.out.print(s1.charAt(i));
7            }
8    }
9}

1// Library approach
2public static String solution(String str) {
3	// StringBuilder is not thread-safe, use StringBuffer
4	return new StringBuffer(str).reverse().toString();
5}
6
7// DIY approach
8public static String solution(String str) {
9	char[] chars = str.toCharArray();
10	for(int i = 0, j = str.length() - 1; i < j; i++, j--) {
11		char ch = chars[i];
12		chars[i] = chars[j];
13		chars[j] = ch;
14	}
15	return new String(chars);
16}

1String string="whatever";
2String reverse = new StringBuffer(string).reverse().toString();
3System.out.println(reverse);
4

1// reverse a string using reverse() method of StringBuilder class
2class ReverseUsingReverseMethod
3{
4   public static void main(String[] args)
5   {
6      String str = "Hello world Java";
7      StringBuilder sb = new StringBuilder();
8      // append string to StringBuilder
9      sb.append(str);
10      sb = sb.reverse();
11      // printing reversed String
12      System.out.println(sb);
13   }
14}

1String reverse = new StringBuilder(string).reverse().toString();

1String s = "abcde";
2s.reverse();
3System.out.println(s);
4
5//s == "edcba"