java string reverse

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 str = "Hello";
2String reverse(String str){
3  StringBuilder sb = new StringBuilder();
4  sb.append(str);
5  sb.reverse();
6  return sb.toString();
7}

1String rev = new StringBuilder("Your String").reverse().toString();

1String str = "Reverse this strings";
2//for loop
3for (int i = str.length() - 1; i >= 0; i--) {
4	System.out.print(str.charAt(i));
5}
6
7// StringBuffer for multi thread
8StringBuffer sb = new StringBuffer(); 
9sb.append(str);
10System.out.print(sb.reverse().toString());
11
12// StringBuffer for single thread
13StringBuilder sb = new StringBuilder(); 
14sb.append(str);
15System.out.print(sb.reverse().toString());

1// reverse a string using character array
2class ReverseUsingCharacterArray
3{
4   public static void main(String[] args)
5   {
6      String str = "HelloWorldJava";
7      char[] ch = str.toCharArray();
8      for(int a = ch.length - 1; a >= 0; a--)
9         System.out.print(ch[a]);
10   }
11}