Swapping pair of character in a string

[HelpMePls]

For one assignment I've gotten today, I need to take the string and swap every 2 pairs of characters as encryption.

eg. testing here

After the encrypting,

It will be "ettsni geher"

How do i go about it??

Thanks a million in advance! :(

[Junky]

Use the methods of the String class but remember String is immutable so you need to create a new String all the time.

Or you can use StringBuilder or StringBuffer classes which are basically mutable Strings and have mostly the same methods that String has.

[pbrockway2]

Another way would be to look at the String methods for one that gives you an array of characters. (And for a suitable constructor so you can get a String back when you have finished working on the array).

Working along the array and swapping the characters is something that suggests using a for loop.