// Example 1, remove all instances of a word with another in a String.
// Example 2, remove all white spaces from a String
public static String manipulateString(String s){
String result = s;
//1 replace all instances of the word foo with the word bee
result = result.replaceAll("(?:foo)", "bee");
// remove all white space
result = result.replaceAll("\\s+", "");
return result;
}