Different ways to reverse String in java

There can be different ways to reverse the String. Here , we are mentioning few.

Let’s understand them with example.

1. We can reverse the string by using a for loop and method charAt.

		String OriginalString = "Hello World!!";
		String temp = "";
		System.out.println("Original String is "+OriginalString);
		
		for(int i=0;i<OriginalString.length();i++){
			char ch = OriginalString.charAt(i);
			temp  = ch +temp;
		}

		System.out.println("Reversed string is "+temp);
Output:
Original String is Hello World!!
Reversed string is !!dlroW olleH

 

2. Using the StringBuffer class.

public class StringReverse {

	public static void main(String[] args) throws InterruptedException {
		
		String OriginalString = "Hello World!!";
		String temp = "";
		System.out.println("Original String is "+OriginalString);
		StringBuffer strBfr = new StringBuffer(OriginalString);
		strBfr.reverse();
		System.out.println("Reversed string is "+strBfr);
	}

}
Output:
Original String is Hello World!!
Reversed string is !!dlroW olleH

 

3. Using the StringBuilder class.

public class StringReverse {

	public static void main(String[] args) throws InterruptedException {
		
		String OriginalString = "Hello World!!";
		String temp = "";
		System.out.println("Original String is "+OriginalString);
		StringBuilder strBld = new StringBuilder(OriginalString);
		strBld.reverse();
		System.out.println("Reversed string is "+strBld);
	}

}
Output:
Original String is Hello World!!
Reversed string is !!dlroW olleH
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Shekhar Sharma

Shekhar Sharma is founder of testingpool.com. This website is his window to the world. He believes that ,"Knowledge increases by sharing but not by saving".

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