Replace multiple characters in a string in Java

Question

I have some strings with equations in the following format ((a+b)/(c+(d*e))).

I also have a text file that contains the names of each variable, e.g.:

Answer 1

For string str, use the replaceAll() function:

str = str.toUpperCase();  //Prevent substitutions of characters in the middle of a word
str = str.replaceAll("A", "velocity");
str = str.replaceAll("B", "distance");
//etc.