/**
*
* Java program to reverse String in Java. There are multiple ways
to reverse
* String in Java, you can either take help of standard Java API
StringBuffer
* to reverse String in Java. StringBuffer has a reverse() method which
return StringBuffer
* with reversed contents. On the other hand you can also reverse it by
applying your
* own logic, if asked to reverse String without using StringBuffer in
Java. By the way
* you can also use StringBuilder to reverse String in Java. StringBuilder
is non thread-safe
* version of StringBuffer and provides similar API. You can use StringBuilder's
reverse()
* method to reverse content and then convert it back to String
*
* @author http://java67.blogspot.com
*/
public class
StringReverseExample {
public static void
main(String args[])
{
//quick wasy to
reverse String in Java - Use StringBuffer
String word = "HelloWorld";
String reverse =
new StringBuffer(word).reverse().toString();
System.out.printf(" original String : %s , reversed String %s
%n", word, reverse);
//another quick to
reverse String in Java - use StringBuilder
word = "WakeUp";
reverse = new StringBuilder(word).reverse().toString();
System.out.printf(" original String : %s , reversed String %s %n",
word, reverse);
//one way to reverse
String without using StringBuffer or StringBuilder is writing
//own utility method
word = "Band";
reverse =
reverse(word);
System.out.printf(" original String : %s , reversed String %s %n",
word, reverse);
}
public static String reverse(String
source){
if(source == null ||
source.isEmpty()){
return
source;
}
String reverse =
"";
for(int i = source.length() -1; i>=0; i--){
reverse =
reverse + source.charAt(i);
}
return
reverse;
}
}
Output:
original String : HelloWorld , reversed
String dlroWolleH
original String : WakeUp , reversed String
pUekaW
original String : Band , reversed String
dnaB
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