ReverseString.java

package coding;

import org.testng.annotations.Test;

public class ReverseString extends BaseTestNg{

	String data ="i am going good";
	// Using StringBuilder class
	@Test(priority=1)
	public void reverseUsingStringBuilder() {		 
		StringBuilder input = new StringBuilder(data);
		System.out.println(input.reverse());
	}

	// Using character array
	@Test(priority=2)
	public void reverseUsingCharacter() {		 
		char[] chr = data.toCharArray();
		for (int i = chr.length-1; i>=0; i--)
			System.out.print(chr[i]);
		System.out.println();
	}

	// Using character position
	@Test(priority=3)
	public void reverseUsingCharAt() {		 
		for (int i = data.length()-1; i>=0; i--)
			System.out.print(data.charAt(i));		
		System.out.println();
	}
}