reverse string in java without using function code example

Example 1: reverse string java

// Use StringBuilder for non-thread environment, it is faster
String string="whatever";
String reverse = new StringBuilder(string).reverse().toString();
System.out.println(reverse);

Example 2: java reverse a string

// Library approach
public static String solution(String str) {
	// StringBuilder is not thread-safe, use StringBuffer
	return new StringBuffer(str).reverse().toString();
}

// DIY approach
public static String solution(String str) {
	char[] chars = str.toCharArray();
	for(int i = 0, j = str.length() - 1; i < j; i++, j--) {
		char ch = chars[i];
		chars[i] = chars[j];
		chars[j] = ch;
	}
	return new String(chars);
}

Example 3: java string reverse

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

Example 4: Reverse a string in java

// reverse a string using reverse() method of StringBuilder class
class ReverseUsingReverseMethod
{
   public static void main(String[] args)
   {
      String str = "Hello world Java";
      StringBuilder sb = new StringBuilder();
      // append string to StringBuilder
      sb.append(str);
      sb = sb.reverse();
      // printing reversed String
      System.out.println(sb);
   }
}

Example 5: reverse a string in java

Solution 1 

public static String StrReverse(String str) {

String reverse="";

for(int i=str.length()-1; i >= 0; i--)

reverse += str.toCharArray()[i];

 

return  reverse;

}

 

Solution 2 (using string buffer)

public  static String  Reverse(String str) {

return new StringBuffer(str).reverse().toString());

}

Example 6: Java how to reverse a string

Don't use Java, use C#